• Refactored input/output options variables and methods from FFmpegCommand into ShellCommand, so that all subclasses can use them. • Enhanced ConvertCommand to do more intelligent processing of PDF frames of varying sizes and aspect ratios.

nigel.stanger / process_podcast

Browse code • Refactored input/output options variables and methods from FFmpegCommand into ShellCommand, so that all subclasses can use them. • Enhanced ConvertCommand to do more intelligent processing of PDF frames of varying sizes and aspect ratios. Python2.7 master LAST_2.7_RELEASE
1 parent b62cf45 commit 59f1cc408be1aa73b4f8014a39ca79ccb46939cb Nigel Stanger authored on 29 Aug 2016

Patch

Showing 2 changed files

Ignore Space Show notes View segment.py
#!/usr/bin/env python from collections import OrderedDict import errno import itertools import logging import os import os.path import globals from shell_command import (ConvertCommand, FFprobeCommand, FFmpegCommand) class Segment(object): """A segment within the podcast. A segment has an input file, and a punch-in and punch-out point (both in seconds). """ # Automatic segment number generator. _new_segment_num = itertools.count().next # Keep track of input files in the order they're loaded, so that we # can easily reference them by index in the ffmpeg command (i.e., # first input file is, 0, etc.). _input_files = OrderedDict() # A string representing the type of the segment (e.g., "audio"). # This is handy for generating temporary files and means that we # can implement this as a single method in the root class. _TYPE = "" # Which trim and setpts filters to use in ffmpeg complex filters. # As above, this lets us implement a single method in the root class. _TRIM = "" _SETPTS = "" @staticmethod def input_files(): return Segment._input_files @staticmethod def _rename_input_file(old, new): tmp = OrderedDict() for f in Segment._input_files: if (f == old): tmp[new] = Segment._input_files[f] else: tmp[f] = Segment._input_files[f] Segment._input_files = tmp def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): self.segment_number = self.__class__._new_segment_num() self.input_file = file self.punch_in = punch_in self.punch_out = punch_out self.input_stream = input_stream self._temp_file = "" self._temp_suffix = "mov" if (file not in self.__class__._input_files): self.__class__._input_files[file] = None self._input_options = ["-ss", str(self.punch_in.total_seconds()), "-t", str(self.get_duration()), "-i", self.input_file] self._output_options = [] def __repr__(self): return('<{c} {n}: file "{f}", in {i}, out ' '{o}>'.format(c=self.__class__.__name__, n=self.segment_number, t=self._TYPE, f=self.input_file, i=self.punch_in, o=self.punch_out)) def get_duration(self): """Return the duration of the segment in seconds.""" return (self.punch_out - self.punch_in).total_seconds() def generate_temp_file(self, output): """Compile the segment from the original source file(s).""" fn = "generate_temp_file" self._temp_file = os.path.extsep.join( ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE, o=os.path.splitext(output)[0], n=self.segment_number), self._temp_suffix]) command = FFmpegCommand( input_options=self._input_options + ["-codec", "copy"], output_options=self._output_options + [self._temp_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): return self._temp_file else: return None def temp_file(self): """Return the temporary file associated with the segment.""" return self._temp_file def delete_temp_files(self): """Delete the temporary file(s) associated with the segment.""" # Note: sometimes segments (especially frame segments) may # share the same temporary file. Just ignore the file not # found exception that occurs in these cases. if (self._temp_file): try: os.remove(self._temp_file) except OSError as e: if (e.errno != errno.ENOENT): raise e def input_stream_specifier(self): """Return the segment's ffmpeg stream input specifier.""" return "[{n}:{t}]".format( n=self.__class__._input_files.keys().index(self.input_file), t=self._TYPE[0] if self._TYPE else "") def output_stream_specifier(self): """Return the segment's ffmpeg audio stream output specifier.""" return "[{t}{n}]".format(t=self._TYPE[0] if self._TYPE else "", n=self.segment_number) def trim_filter(self): """Return an FFMPEG trim filter for this segment.""" return ("{inspec} " "{trim}=start={pi}:duration={po},{setpts}=PTS-STARTPTS " "{outspec}".format( inspec=self.input_stream_specifier(), trim=self._TRIM, setpts=self._SETPTS, pi=self.punch_in.total_seconds(), po=self.get_duration(), outspec=self.output_stream_specifier())) class AudioSegment(Segment): """A segment of an audio input stream.""" _TYPE = "audio" _TRIM = "atrim" _SETPTS = "asetpts" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): super(AudioSegment, self).__init__(file, punch_in, punch_out, input_stream) self._temp_suffix = "wav" self._output_options = ["-ac", "1", "-map", "{n}:a".format(n=self.input_stream)] class VideoSegment(Segment): """A segment of a video input stream.""" _TYPE = "video" _TRIM = "trim" _SETPTS = "setpts" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): super(VideoSegment, self).__init__(file, punch_in, punch_out, input_stream) self._output_options = ["-map", "{n}:v".format(n=self.input_stream)] self._temp_frame_file = "" def get_last_frame_number(self): """Calculate frame number of segment's last frame using ffprobe.""" fn = "get_last_frame_number" if (self._temp_file): self._temp_frame_file = "__{f}".format(f=self._temp_file) # To speed things up, grab up to the last 5 seconds of the # segment's temporary file, as we otherwise have to scan the # entire temporary file to find the last frame, which can # take a while. command = FFmpegCommand( input_options=["-ss", str(max(self.get_duration() - 5, 0)), "-i", self._temp_file], output_options=["-codec:v", "copy", "-map", "0:v", self._temp_frame_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) command.run() command = FFprobeCommand( options=["-select_streams", "v", "-show_entries", "stream=nb_frames", "-print_format", "default=noprint_wrappers=1:nokey=1", self._temp_frame_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) return int(command.get_output().strip()) - 1 else: return -1 def generate_frame(self, frame_number, output): """Create a JPEG file from the specified frame of the segment.""" fn = "generate_frame" temp_frame = os.path.extsep.join( ["temp_{t}_{f}_{n:03d}".format(t=self._TYPE, f=os.path.splitext(output)[0], n=self.segment_number), "jpg"]) if (frame_number == -1): frame_number = self.get_last_frame_number() command = FFmpegCommand( input_options=["-i", self._temp_frame_file], output_options=["-filter:v", "select='eq(n, {n})'".format(n=frame_number), "-frames:v", "1", "-f", "image2", "-map", "0:v", temp_frame]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): os.remove(self._temp_frame_file) return temp_frame else: return None class FrameSegment(VideoSegment): """A video segment derived from a single still frame.""" _TYPE = "frame" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0, frame_number=0): super(FrameSegment, self).__init__(file, punch_in, punch_out, input_stream) self.frame_number = frame_number self._input_options = ["-loop", "1", "-t", str(self.get_duration()), "-i", self.input_file] self.__class__._input_files[file] = self._input_options[:4] def __repr__(self): return('<{c} {n}: file "{f}", in {i}, out {o}, frame number ' '{fn}>'.format(c=self.__class__.__name__, n=self.segment_number, t=self._TYPE, f=self.input_file, i=self.punch_in, o=self.punch_out, fn=self.frame_number)) def generate_temp_file(self, output): """Compile the segment from the original source file(s).""" fn = "generate_temp_file" self._temp_file = os.path.extsep.join( ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE, o=os.path.splitext(output)[0], n=self.segment_number), "jpg"]) command = ConvertCommand( input_options=["{f}[{n}]".format(f=self.input_file, n=self.frame_number)], output_options=["{f}".format(f=self._temp_file)]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): return self._temp_file else: return None def use_frame(self, frame): """Set the image to use for generating the frame video.""" self.__class__._rename_input_file(self.input_file, frame) self.input_file = frame self._input_options = ["-loop", "1", "-t", str(self.get_duration()), "-i", self.input_file] self.__class__._input_files[frame] = self._input_options[:4] def input_stream_specifier(self): """Return the segment's ffmpeg stream input specifier.""" return "[{n}:v]".format( n=self.__class__._input_files.keys().index(self.input_file)) def output_stream_specifier(self): """Return the segment's ffmpeg audio stream output specifier.""" return self.input_stream_specifier() def trim_filter(self): """Return an FFMPEG trim filter for this segment.""" return "" def delete_temp_files(self): """Delete the temporary file(s) associated with the scene.""" # Note: sometimes segments (especially frame segments) may # share the same temporary file. Just ignore the file not # found exception that occurs in these cases. if (self.input_file): try: os.remove(self.input_file) except OSError as e: if (e.errno != errno.ENOENT): raise e super(FrameSegment, self).delete_temp_files() if (__name__ == "__main__"): pass #!/usr/bin/env python from collections import OrderedDict import errno import itertools import logging import os import os.path import globals from shell_command import (ConvertCommand, FFprobeCommand, FFmpegCommand) class Segment(object): """A segment within the podcast. A segment has an input file, and a punch-in and punch-out point (both in seconds). """ # Automatic segment number generator. _new_segment_num = itertools.count().next # Keep track of input files in the order they're loaded, so that we # can easily reference them by index in the ffmpeg command (i.e., # first input file is, 0, etc.). _input_files = OrderedDict() # A string representing the type of the segment (e.g., "audio"). # This is handy for generating temporary files and means that we # can implement this as a single method in the root class. _TYPE = "" # Which trim and setpts filters to use in ffmpeg complex filters. # As above, this lets us implement a single method in the root class. _TRIM = "" _SETPTS = "" @staticmethod def input_files(): return Segment._input_files @staticmethod def _rename_input_file(old, new): tmp = OrderedDict() for f in Segment._input_files: if (f == old): tmp[new] = Segment._input_files[f] else: tmp[f] = Segment._input_files[f] Segment._input_files = tmp def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): self.segment_number = self.__class__._new_segment_num() self.input_file = file self.punch_in = punch_in self.punch_out = punch_out self.input_stream = input_stream self._temp_file = "" self._temp_suffix = "mov" if (file not in self.__class__._input_files): self.__class__._input_files[file] = None self._input_options = ["-ss", str(self.punch_in.total_seconds()), "-t", str(self.get_duration()), "-i", self.input_file] self._output_options = [] def __repr__(self): return('<{c} {n}: file "{f}", in {i}, out ' '{o}>'.format(c=self.__class__.__name__, n=self.segment_number, t=self._TYPE, f=self.input_file, i=self.punch_in, o=self.punch_out)) def get_duration(self): """Return the duration of the segment in seconds.""" return (self.punch_out - self.punch_in).total_seconds() def generate_temp_file(self, output): """Compile the segment from the original source file(s).""" fn = "generate_temp_file" self._temp_file = os.path.extsep.join( ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE, o=os.path.splitext(output)[0], n=self.segment_number), self._temp_suffix]) command = FFmpegCommand( input_options=self._input_options + ["-codec", "copy"], output_options=self._output_options + [self._temp_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): return self._temp_file else: return None def temp_file(self): """Return the temporary file associated with the segment.""" return self._temp_file def delete_temp_files(self): """Delete the temporary file(s) associated with the segment.""" # Note: sometimes segments (especially frame segments) may # share the same temporary file. Just ignore the file not # found exception that occurs in these cases. if (self._temp_file): try: os.remove(self._temp_file) except OSError as e: if (e.errno != errno.ENOENT): raise e def input_stream_specifier(self): """Return the segment's ffmpeg stream input specifier.""" return "[{n}:{t}]".format( n=self.__class__._input_files.keys().index(self.input_file), t=self._TYPE[0] if self._TYPE else "") def output_stream_specifier(self): """Return the segment's ffmpeg audio stream output specifier.""" return "[{t}{n}]".format(t=self._TYPE[0] if self._TYPE else "", n=self.segment_number) def trim_filter(self): """Return an FFMPEG trim filter for this segment.""" return ("{inspec} " "{trim}=start={pi}:duration={po},{setpts}=PTS-STARTPTS " "{outspec}".format( inspec=self.input_stream_specifier(), trim=self._TRIM, setpts=self._SETPTS, pi=self.punch_in.total_seconds(), po=self.get_duration(), outspec=self.output_stream_specifier())) class AudioSegment(Segment): """A segment of an audio input stream.""" _TYPE = "audio" _TRIM = "atrim" _SETPTS = "asetpts" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): super(AudioSegment, self).__init__(file, punch_in, punch_out, input_stream) self._temp_suffix = "wav" self._output_options = ["-ac", "1", "-map", "{n}:a".format(n=self.input_stream)] class VideoSegment(Segment): """A segment of a video input stream.""" _TYPE = "video" _TRIM = "trim" _SETPTS = "setpts" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0): super(VideoSegment, self).__init__(file, punch_in, punch_out, input_stream) self._output_options = ["-map", "{n}:v".format(n=self.input_stream)] self._temp_frame_file = "" def get_last_frame_number(self): """Calculate frame number of segment's last frame using ffprobe.""" fn = "get_last_frame_number" if (self._temp_file): self._temp_frame_file = "__{f}".format(f=self._temp_file) # To speed things up, grab up to the last 5 seconds of the # segment's temporary file, as we otherwise have to scan the # entire temporary file to find the last frame, which can # take a while. command = FFmpegCommand( input_options=["-ss", str(max(self.get_duration() - 5, 0)), "-i", self._temp_file], output_options=["-codec:v", "copy", "-map", "0:v", self._temp_frame_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) command.run() command = FFprobeCommand( options=["-select_streams", "v", "-show_entries", "stream=nb_frames", "-print_format", "default=noprint_wrappers=1:nokey=1", self._temp_frame_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) return int(command.get_output().strip()) - 1 else: return -1 def generate_frame(self, frame_number, output): """Create a JPEG file from the specified frame of the segment.""" fn = "generate_frame" temp_frame = os.path.extsep.join( ["temp_{t}_{f}_{n:03d}".format(t=self._TYPE, f=os.path.splitext(output)[0], n=self.segment_number), "jpg"]) if (frame_number == -1): frame_number = self.get_last_frame_number() command = FFmpegCommand( input_options=["-i", self._temp_frame_file], output_options=["-filter:v", "select='eq(n, {n})'".format(n=frame_number), "-frames:v", "1", "-f", "image2", "-map", "0:v", temp_frame]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): os.remove(self._temp_frame_file) return temp_frame else: return None class FrameSegment(VideoSegment): """A video segment derived from a single still frame.""" _TYPE = "frame" def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0, frame_number=0): super(FrameSegment, self).__init__(file, punch_in, punch_out, input_stream) self.frame_number = frame_number self._input_options = ["-loop", "1", "-t", str(self.get_duration()), "-i", self.input_file] self.__class__._input_files[file] = self._input_options[:4] def __repr__(self): return('<{c} {n}: file "{f}", in {i}, out {o}, frame number ' '{fn}>'.format(c=self.__class__.__name__, n=self.segment_number, t=self._TYPE, f=self.input_file, i=self.punch_in, o=self.punch_out, fn=self.frame_number)) def generate_temp_file(self, output): """Compile the segment from the original source file(s).""" fn = "generate_temp_file" self._temp_file = os.path.extsep.join( ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE, o=os.path.splitext(output)[0], n=self.segment_number), "jpg"]) command = ConvertCommand( options=["{f}[{n}]".format(f=self.input_file, n=self.frame_number), self._temp_file]) globals.log.debug("{cls}.{fn}(): {cmd}".format( cls=self.__class__.__name__, fn=fn, cmd=command)) if (command.run() == 0): return self._temp_file else: return None def use_frame(self, frame): """Set the image to use for generating the frame video.""" self.__class__._rename_input_file(self.input_file, frame) self.input_file = frame self._input_options = ["-loop", "1", "-t", str(self.get_duration()), "-i", self.input_file] self.__class__._input_files[frame] = self._input_options[:4] def input_stream_specifier(self): """Return the segment's ffmpeg stream input specifier.""" return "[{n}:v]".format( n=self.__class__._input_files.keys().index(self.input_file)) def output_stream_specifier(self): """Return the segment's ffmpeg audio stream output specifier.""" return self.input_stream_specifier() def trim_filter(self): """Return an FFMPEG trim filter for this segment.""" return "" def delete_temp_files(self): """Delete the temporary file(s) associated with the scene.""" # Note: sometimes segments (especially frame segments) may # share the same temporary file. Just ignore the file not # found exception that occurs in these cases. if (self.input_file): try: os.remove(self.input_file) except OSError as e: if (e.errno != errno.ENOENT): raise e super(FrameSegment, self).delete_temp_files() if (__name__ == "__main__"): pass

Ignore Space Show notes View

segment.py

#!/usr/bin/env python

from collections import OrderedDict
import errno
import itertools
import logging
import os
import os.path

import globals
from shell_command import (ConvertCommand, FFprobeCommand, FFmpegCommand)

class Segment(object):
    """A segment within the podcast.
    
    A segment has an input file, and a punch-in and punch-out
    point (both in seconds).
    """
    # Automatic segment number generator.
    _new_segment_num = itertools.count().next
    
    # Keep track of input files in the order they're loaded, so that we
    # can easily reference them by index in the ffmpeg command (i.e.,
    # first input file is, 0, etc.).
    _input_files = OrderedDict()
    
    # A string representing the type of the segment (e.g., "audio").
    # This is handy for generating temporary files and means that we
    # can implement this as a single method in the root class.
    _TYPE = ""
    
    # Which trim and setpts filters to use in ffmpeg complex filters.
    # As above, this lets us implement a single method in the root class.
    _TRIM = ""
    _SETPTS = ""
    
    @staticmethod
    def input_files():
        return Segment._input_files
    
    @staticmethod
    def _rename_input_file(old, new):
        tmp = OrderedDict()
        for f in Segment._input_files:
            if (f == old):
                tmp[new] = Segment._input_files[f]
            else:
                tmp[f] = Segment._input_files[f]
        Segment._input_files = tmp
    
    def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0):
        self.segment_number = self.__class__._new_segment_num()
        self.input_file = file
        self.punch_in = punch_in
        self.punch_out = punch_out
        self.input_stream = input_stream
        self._temp_file = ""
        self._temp_suffix = "mov"
        
        if (file not in self.__class__._input_files):
            self.__class__._input_files[file] = None
        
        self._input_options = ["-ss", str(self.punch_in.total_seconds()),
                               "-t", str(self.get_duration()),
                               "-i", self.input_file]
        self._output_options = []
            
    def __repr__(self):
        return('<{c} {n}: file "{f}", in {i}, out '
               '{o}>'.format(c=self.__class__.__name__,
                             n=self.segment_number,
                             t=self._TYPE,
                             f=self.input_file,
                             i=self.punch_in,
                             o=self.punch_out))
    
    def get_duration(self):
        """Return the duration of the segment in seconds."""
        return (self.punch_out - self.punch_in).total_seconds()
    
    def generate_temp_file(self, output):
        """Compile the segment from the original source file(s)."""
        fn = "generate_temp_file"
        self._temp_file = os.path.extsep.join(
            ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE,
                                           o=os.path.splitext(output)[0],
                                           n=self.segment_number),
             self._temp_suffix])
        command = FFmpegCommand(
            input_options=self._input_options + ["-codec", "copy"],
            output_options=self._output_options + [self._temp_file])
        globals.log.debug("{cls}.{fn}(): {cmd}".format(
            cls=self.__class__.__name__, fn=fn, cmd=command))
        if (command.run() == 0):
            return self._temp_file
        else:
            return None
    
    def temp_file(self):
        """Return the temporary file associated with the segment."""
        return self._temp_file
    
    def delete_temp_files(self):
        """Delete the temporary file(s) associated with the segment."""
        # Note: sometimes segments (especially frame segments) may
        # share the same temporary file. Just ignore the file not
        # found exception that occurs in these cases.
        if (self._temp_file):
            try:
                os.remove(self._temp_file)
            except OSError as e:
                if (e.errno != errno.ENOENT):
                    raise e
    
    def input_stream_specifier(self):
        """Return the segment's ffmpeg stream input specifier."""
        return "[{n}:{t}]".format(
            n=self.__class__._input_files.keys().index(self.input_file),
            t=self._TYPE[0] if self._TYPE else "")
        
    def output_stream_specifier(self):
        """Return the segment's ffmpeg audio stream output specifier."""
        return "[{t}{n}]".format(t=self._TYPE[0] if self._TYPE else "",
                                 n=self.segment_number)
    
    def trim_filter(self):
        """Return an FFMPEG trim filter for this segment."""
        return ("{inspec} "
                "{trim}=start={pi}:duration={po},{setpts}=PTS-STARTPTS "
                "{outspec}".format(
                    inspec=self.input_stream_specifier(),
                    trim=self._TRIM, setpts=self._SETPTS,
                    pi=self.punch_in.total_seconds(),
                    po=self.get_duration(),
                    outspec=self.output_stream_specifier()))

class AudioSegment(Segment):
    """A segment of an audio input stream."""
    _TYPE = "audio"
    _TRIM = "atrim"
    _SETPTS = "asetpts"

def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0):
        super(AudioSegment, self).__init__(file, punch_in, punch_out,
                                           input_stream)
        self._temp_suffix = "wav"
        self._output_options = ["-ac", "1",
                                "-map", "{n}:a".format(n=self.input_stream)]

class VideoSegment(Segment):
    """A segment of a video input stream."""
    _TYPE = "video"
    _TRIM = "trim"
    _SETPTS = "setpts"

def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0):
        super(VideoSegment, self).__init__(file, punch_in, punch_out,
                                           input_stream)
        self._output_options = ["-map", "{n}:v".format(n=self.input_stream)]
        self._temp_frame_file = ""
    
    def get_last_frame_number(self):
        """Calculate frame number of segment's last frame using ffprobe."""
        fn = "get_last_frame_number"
        if (self._temp_file):
            self._temp_frame_file = "__{f}".format(f=self._temp_file)
        
            # To speed things up, grab up to the last 5 seconds of the
            # segment's temporary file, as we otherwise have to scan the
            # entire temporary file to find the last frame, which can
            # take a while.
            command = FFmpegCommand(
                input_options=["-ss", str(max(self.get_duration() - 5, 0)),
                               "-i", self._temp_file],
                output_options=["-codec:v", "copy",
                                "-map", "0:v",
                                self._temp_frame_file])
            globals.log.debug("{cls}.{fn}(): {cmd}".format(
                cls=self.__class__.__name__, fn=fn, cmd=command))
            command.run()
            command = FFprobeCommand(
                options=["-select_streams", "v",
                         "-show_entries", "stream=nb_frames",
                         "-print_format", "default=noprint_wrappers=1:nokey=1",
                         self._temp_frame_file])
            globals.log.debug("{cls}.{fn}(): {cmd}".format(
                cls=self.__class__.__name__, fn=fn, cmd=command))
            return int(command.get_output().strip()) - 1
        else:
            return -1
    
    def generate_frame(self, frame_number, output):
        """Create a JPEG file from the specified frame of the segment."""
        fn = "generate_frame"
        temp_frame = os.path.extsep.join(
            ["temp_{t}_{f}_{n:03d}".format(t=self._TYPE,
                                           f=os.path.splitext(output)[0],
                                           n=self.segment_number),
             "jpg"])
        if (frame_number == -1):
            frame_number = self.get_last_frame_number()
        command = FFmpegCommand(
            input_options=["-i", self._temp_frame_file],
            output_options=["-filter:v",
                            "select='eq(n, {n})'".format(n=frame_number),
                            "-frames:v", "1",
                            "-f", "image2",
                            "-map", "0:v",
                            temp_frame])
        globals.log.debug("{cls}.{fn}(): {cmd}".format(
            cls=self.__class__.__name__, fn=fn, cmd=command))
        if (command.run() == 0):
            os.remove(self._temp_frame_file)
            return temp_frame
        else:
            return None

class FrameSegment(VideoSegment):
    """A video segment derived from a single still frame."""
    _TYPE = "frame"
    
    def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0,
                 frame_number=0):
        super(FrameSegment, self).__init__(file, punch_in, punch_out,
                                           input_stream)
        self.frame_number = frame_number
        self._input_options = ["-loop", "1",
                               "-t", str(self.get_duration()),
                               "-i", self.input_file]
        self.__class__._input_files[file] = self._input_options[:4]
    
    def __repr__(self):
        return('<{c} {n}: file "{f}", in {i}, out {o}, frame number '
               '{fn}>'.format(c=self.__class__.__name__,
                             n=self.segment_number,
                             t=self._TYPE,
                             f=self.input_file,
                             i=self.punch_in,
                             o=self.punch_out,
                             fn=self.frame_number))
    
    def generate_temp_file(self, output):
        """Compile the segment from the original source file(s)."""
        fn = "generate_temp_file"
        self._temp_file = os.path.extsep.join(
            ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE,
                                           o=os.path.splitext(output)[0],
                                           n=self.segment_number),
             "jpg"])
        command = ConvertCommand(
            input_options=["{f}[{n}]".format(f=self.input_file,
                                             n=self.frame_number)],
            output_options=["{f}".format(f=self._temp_file)])
        globals.log.debug("{cls}.{fn}(): {cmd}".format(
            cls=self.__class__.__name__, fn=fn, cmd=command))
        if (command.run() == 0):
            return self._temp_file
        else:
            return None
    
    def use_frame(self, frame):
        """Set the image to use for generating the frame video."""
        self.__class__._rename_input_file(self.input_file, frame)
        self.input_file = frame
        self._input_options = ["-loop", "1",
                               "-t", str(self.get_duration()),
                               "-i", self.input_file]
        self.__class__._input_files[frame] = self._input_options[:4]
        
    def input_stream_specifier(self):
        """Return the segment's ffmpeg stream input specifier."""
        return "[{n}:v]".format(
            n=self.__class__._input_files.keys().index(self.input_file))
        
    def output_stream_specifier(self):
        """Return the segment's ffmpeg audio stream output specifier."""
        return self.input_stream_specifier()
    
    def trim_filter(self):
        """Return an FFMPEG trim filter for this segment."""
        return ""
    
    def delete_temp_files(self):
        """Delete the temporary file(s) associated with the scene."""
        # Note: sometimes segments (especially frame segments) may
        # share the same temporary file. Just ignore the file not
        # found exception that occurs in these cases.
        if (self.input_file):
            try:
                os.remove(self.input_file)
            except OSError as e:
                if (e.errno != errno.ENOENT):
                    raise e
        super(FrameSegment, self).delete_temp_files()

if (__name__ == "__main__"):
    pass

#!/usr/bin/env python

from collections import OrderedDict
import errno
import itertools
import logging
import os
import os.path

import globals
from shell_command import (ConvertCommand, FFprobeCommand, FFmpegCommand)

class AudioSegment(Segment):
    """A segment of an audio input stream."""
    _TYPE = "audio"
    _TRIM = "atrim"
    _SETPTS = "asetpts"

class VideoSegment(Segment):
    """A segment of a video input stream."""
    _TYPE = "video"
    _TRIM = "trim"
    _SETPTS = "setpts"

class FrameSegment(VideoSegment):
    """A video segment derived from a single still frame."""
    _TYPE = "frame"
    
    def __init__(self, file="", punch_in=0, punch_out=0, input_stream=0,
                 frame_number=0):
        super(FrameSegment, self).__init__(file, punch_in, punch_out,
                                           input_stream)
        self.frame_number = frame_number
        self._input_options = ["-loop", "1",
                               "-t", str(self.get_duration()),
                               "-i", self.input_file]
        self.__class__._input_files[file] = self._input_options[:4]
    
    def __repr__(self):
        return('<{c} {n}: file "{f}", in {i}, out {o}, frame number '
               '{fn}>'.format(c=self.__class__.__name__,
                             n=self.segment_number,
                             t=self._TYPE,
                             f=self.input_file,
                             i=self.punch_in,
                             o=self.punch_out,
                             fn=self.frame_number))
    
    def generate_temp_file(self, output):
        """Compile the segment from the original source file(s)."""
        fn = "generate_temp_file"
        self._temp_file = os.path.extsep.join(
            ["temp_{t}_{o}_{n:03d}".format(t=self._TYPE,
                                           o=os.path.splitext(output)[0],
                                           n=self.segment_number),
             "jpg"])
        command = ConvertCommand(
            options=["{f}[{n}]".format(f=self.input_file,
                                       n=self.frame_number),
                     self._temp_file])
        globals.log.debug("{cls}.{fn}(): {cmd}".format(
            cls=self.__class__.__name__, fn=fn, cmd=command))
        if (command.run() == 0):
            return self._temp_file
        else:
            return None
    
    def use_frame(self, frame):
        """Set the image to use for generating the frame video."""
        self.__class__._rename_input_file(self.input_file, frame)
        self.input_file = frame
        self._input_options = ["-loop", "1",
                               "-t", str(self.get_duration()),
                               "-i", self.input_file]
        self.__class__._input_files[frame] = self._input_options[:4]
        
    def input_stream_specifier(self):
        """Return the segment's ffmpeg stream input specifier."""
        return "[{n}:v]".format(
            n=self.__class__._input_files.keys().index(self.input_file))
        
    def output_stream_specifier(self):
        """Return the segment's ffmpeg audio stream output specifier."""
        return self.input_stream_specifier()
    
    def trim_filter(self):
        """Return an FFMPEG trim filter for this segment."""
        return ""
    
    def delete_temp_files(self):
        """Delete the temporary file(s) associated with the scene."""
        # Note: sometimes segments (especially frame segments) may
        # share the same temporary file. Just ignore the file not
        # found exception that occurs in these cases.
        if (self.input_file):
            try:
                os.remove(self.input_file)
            except OSError as e:
                if (e.errno != errno.ENOENT):
                    raise e
        super(FrameSegment, self).delete_temp_files()

if (__name__ == "__main__"):
    pass

Ignore Space Show notes View shell_command.py
#!/usr/bin/env python import distutils.spawn import re import subprocess class ShellCommand(object): """A shell command. _executable contains the full path to the relevant executable. _base_options is a list of standard general options for this command. """ _executable = "" _base_options = [] def __init__(self, input_options=[], output_options=[]): self.input_options = input_options self.output_options = output_options def __repr__(self): return "<{cls}: {cmd}>".format( cls=self.__class__.__name__, cmd=" ".join(self.command_items(True))) def append_input_options(self, items=[]): """Add a list of items to the end of the input options.""" self.input_options += items def prepend_input_options(self, items=[]): """Add a list of items at the front of the input options.""" self.input_options = items + self.input_options def append_output_options(self, items=[]): """Add a list of items to the end of the output options.""" self.output_options += items def prepend_output_options(self, items=[]): """Add a list of items at the front of the output options.""" self.output_options = items + self.output_options def command_items(self, debug=False): """Return the list of items representing the command.""" return ([self._executable] + self._base_options + self.input_options + self.output_options) def run(self): """Execute the command in a subprocess.""" return subprocess.call(self.command_items()) def get_output(self): """Execute the command in a subprocess and return the output.""" return subprocess.check_output(self.command_items()) class ConvertCommand(ShellCommand): """An ImageMagick convert command.""" _executable = distutils.spawn.find_executable("convert") _base_options = ["-density", "600", "-define", "colorspace:auto-grayscale=off", # force RGB "-type", "truecolor", "-size", "2048x1536", "xc:dimgrey", "null:", # dark grey background "("] def __init__(self, input_options=[], output_options=[]): super(ConvertCommand, self).__init__(input_options, output_options) self.append_input_options(["-resize", "2048x1536", "-background", "white", "-alpha", "remove"]) self.prepend_output_options([")", "-gravity", "center", "-layers", "composite", "-flatten"]) def command_items(self, debug=False): """Return the list of items representing the command.""" base_opts = self._base_options input_opts = self.input_options output_opts = self.output_options if (debug): # Wrap frame specifiers in 'single quotes' and prefix # parentheses with backslashes, so that we can copy and # paste the command string directly into the shell for # testing. base_opts = [re.sub(r"\(", r"\\(", s) for s in self._base_options] input_opts = [re.sub(r"\[(\d+)\]", r"'[\1]'", s) for s in self.input_options] output_opts = [re.sub(r"\)", r"\\)", s) for s in self.output_options] return ([self._executable] + base_opts + input_opts + output_opts) class FFprobeCommand(ShellCommand): """An ffprobe shell command.""" _executable = distutils.spawn.find_executable("ffprobe") _base_options = ["-loglevel", "error"] class FFmpegCommand(ShellCommand): """A "simple" ffmpeg shell command.""" _executable = distutils.spawn.find_executable("ffmpeg") _base_options = ["-y", "-loglevel", "error", "-nostdin"] class FFmpegConcatCommand(FFmpegCommand): """An ffmpeg shell command with a complex concat filter.""" def __init__(self, input_options=[], output_options=[]): super(FFmpegConcatCommand, self).__init__( input_options, output_options) self.prepend_output_options(["-codec:a", "pcm_s16le", "-ac", "1", "-codec:v", "h264", "-pix_fmt", "yuv420p", "-map", "[vconc]", "-map", "[anorm]"]) self.filters = [] def append_filter(self, filter): """Append a filter to the filters list.""" self.filters.append(filter) def append_normalisation_filter(self): """Append a normalisation audio filter to the complex filter.""" self.append_filter("[aconc] dynaudnorm=r=0.25:f=10:b=y [anorm]") def append_concat_filter(self, type, segments=[]): """Append a concat filter to the filters list""" if (len(segments) > 1): self.append_filter( "{inspecs} concat=n={n}:v={v}:a={a} [{t}conc]".format( inspecs=" ".join([s.output_stream_specifier() for s in segments]), n=len(segments), v=int(type == "v"), a=int(type == "a"), t=type)) elif (len(segments) == 1): self.append_filter( "{inspec} {a}null [{t}conc]".format( inspec=segments[0].output_stream_specifier(), a=type if type == "a" else "", t=type)) def build_complex_filter(self): """Build the complete complex filter. Filters in the filtergraph are separated by ";". """ return "{f}".format(f=";".join(self.filters)) def command_items(self, debug=False): """Return the list of items representing the command.""" complex_filter = self.build_complex_filter() output_opts = self.output_options if (debug): # Wrap the output streams and the entire complex filter # in 'single quotes', so that we can copy and paste the # command string directly into the shell for testing. complex_filter = "'{f}'".format(f=complex_filter) output_opts = [re.sub(r"\[(\w+)\]", r"'[\1]'", s) for s in self.output_options] return ([self._executable] + self._base_options + self.input_options + ["-filter_complex", complex_filter] + output_opts) if (__name__ == "__main__"): print ShellCommand() print ConvertCommand(input_options=["in.pdf[12]"], output_options=["out.png"]) print FFprobeCommand(input_options=["-i", "in.mov"]) print FFmpegCommand(input_options=["-i", "in.mov"], output_options=["out.mov"]) concat = FFmpegConcatCommand(input_options=["-i", "in.mov"], output_options=["out.mov"]) concat.append_normalisation_filter() print concat #!/usr/bin/env python import distutils.spawn import re import subprocess class ShellCommand(object): """A shell command. _executable contains the full path to the relevant executable. _base_options is a list of standard general options for this command. """ _executable = "" _base_options = [] def __init__(self, options=[]): self.options = options def __repr__(self): return "<{cls}: {cmd}>".format( cls=self.__class__.__name__, cmd=" ".join(self.command_items(True))) def command_items(self, debug=False): """Return the list of items representing the command.""" return ([self._executable] + self._base_options + self.options) def run(self): """Execute the command in a subprocess.""" return subprocess.call(self.command_items()) def get_output(self): """Execute the command in a subprocess and return the output.""" return subprocess.check_output(self.command_items()) class ConvertCommand(ShellCommand): """An ImageMagick convert command.""" _executable = distutils.spawn.find_executable("convert") _base_options = ["-scale", "2048x1536", "-density", "600", "-background", "white", "-flatten"] class FFprobeCommand(ShellCommand): """An ffprobe shell command.""" _executable = distutils.spawn.find_executable("ffprobe") _base_options = ["-loglevel", "error"] class FFmpegCommand(ShellCommand): """A "simple" ffmpeg shell command.""" _executable = distutils.spawn.find_executable("ffmpeg") _base_options = ["-y", "-loglevel", "error", "-nostdin"] def __init__(self, input_options=[], output_options=[]): self.input_options = input_options self.output_options = output_options def append_input_options(self, items=[]): """Add a list of items to the end of the input options.""" self.input_options += items def prepend_input_options(self, items=[]): """Add a list of items at the front of the input options.""" self.input_options = items + self.input_options def append_output_options(self, items=[]): """Add a list of items to the end of the output options.""" self.output_options += items def prepend_output_options(self, items=[]): """Add a list of items at the front of the output options.""" self.output_options = items + self.output_options def command_items(self, debug=False): """Return the list of items representing the command.""" return ([self._executable] + self._base_options + self.input_options + self.output_options) class FFmpegConcatCommand(FFmpegCommand): """An ffmpeg shell command with a complex concat filter.""" def __init__(self, input_options=[], output_options=[]): super(FFmpegConcatCommand, self).__init__( input_options, output_options) self.prepend_output_options(["-codec:a", "pcm_s16le", "-ac", "1", "-codec:v", "h264", "-pix_fmt", "yuv420p", "-map", "[vconc]", "-map", "[anorm]"]) self.filters = [] def append_filter(self, filter): """Append a filter to the filters list.""" self.filters.append(filter) def append_normalisation_filter(self): """Append a normalisation audio filter to the complex filter.""" self.append_filter("[aconc] dynaudnorm=r=0.25:f=10:b=y [anorm]") def append_concat_filter(self, type, segments=[]): """Append a concat filter to the filters list""" if (len(segments) > 1): self.append_filter( "{inspecs} concat=n={n}:v={v}:a={a} [{t}conc]".format( inspecs=" ".join([s.output_stream_specifier() for s in segments]), n=len(segments), v=int(type == "v"), a=int(type == "a"), t=type)) elif (len(segments) == 1): self.append_filter( "{inspec} {a}null [{t}conc]".format( inspec=segments[0].output_stream_specifier(), a=type if type == "a" else "", t=type)) def build_complex_filter(self): """Build the complete complex filter. Filters in the filtergraph are separated by ";". """ return "{f}".format(f=";".join(self.filters)) def command_items(self, debug=False): """Return the list of items representing the command.""" complex_filter = self.build_complex_filter() output_opts = self.output_options if (debug): # Wrap the output streams and the entire complex filter # in 'single quotes', so that we can copy and paste the # command string directly into the shell for testing. complex_filter = "'{f}'".format(f=complex_filter) output_opts = [re.sub(r"\[(\w+)\]", r"'[\1]'", s) for s in self.output_options] return ([self._executable] + self._base_options + self.input_options + ["-filter_complex", complex_filter] + output_opts) if (__name__ == "__main__"): print ShellCommand() print ConvertCommand(options=["in.pdf"]) print FFprobeCommand(options=["-i", "in.mov"]) print FFmpegCommand(input_options=["-i", "in.mov"], output_options=["out.mov"]) concat = FFmpegConcatCommand(input_options=["-i", "in.mov"], output_options=["out.mov"]) concat.append_normalisation_filter() print concat

Ignore Space Show notes View

shell_command.py

#!/usr/bin/env python

import distutils.spawn
import re
import subprocess

class ShellCommand(object):
    """A shell command.
    
    _executable contains the full path to the relevant executable.
    
    _base_options is a list of standard general options for this
    command.
    """
    _executable = ""
    _base_options = []
    
    def __init__(self, input_options=[], output_options=[]):
        self.input_options = input_options
        self.output_options = output_options
    
    def __repr__(self):
        return "<{cls}: {cmd}>".format(
            cls=self.__class__.__name__,
            cmd=" ".join(self.command_items(True)))

def append_input_options(self, items=[]):
        """Add a list of items to the end of the input options."""
        self.input_options += items
    
    def prepend_input_options(self, items=[]):
        """Add a list of items at the front of the input options."""
        self.input_options = items + self.input_options
    
    def append_output_options(self, items=[]):
        """Add a list of items to the end of the output options."""
        self.output_options += items
    
    def prepend_output_options(self, items=[]):
        """Add a list of items at the front of the output options."""
        self.output_options = items + self.output_options
    
    def command_items(self, debug=False):
        """Return the list of items representing the command."""
        return ([self._executable] + self._base_options +
                self.input_options + self.output_options)
    
    def run(self):
        """Execute the command in a subprocess."""
        return subprocess.call(self.command_items())
    
    def get_output(self):
        """Execute the command in a subprocess and return the output."""
        return subprocess.check_output(self.command_items())

class ConvertCommand(ShellCommand):
    """An ImageMagick convert command."""
    _executable = distutils.spawn.find_executable("convert")
    _base_options = ["-density", "600",
                     "-define", "colorspace:auto-grayscale=off", # force RGB
                     "-type", "truecolor",
                     "-size", "2048x1536",
                     "xc:dimgrey", "null:", # dark grey background
                     "("]
    
    def __init__(self, input_options=[], output_options=[]):
        super(ConvertCommand, self).__init__(input_options, output_options)
        self.append_input_options(["-resize", "2048x1536",
                                   "-background", "white", 
                                   "-alpha", "remove"])
        self.prepend_output_options([")",
                                     "-gravity", "center",
                                     "-layers", "composite",
                                     "-flatten"])
    
    def command_items(self, debug=False):
        """Return the list of items representing the command."""
        base_opts = self._base_options
        input_opts = self.input_options
        output_opts = self.output_options
        if (debug):
            # Wrap frame specifiers in 'single quotes' and prefix
            # parentheses with backslashes, so that we can copy and
            # paste the command string directly into the shell for
            # testing.
            base_opts = [re.sub(r"\(", r"\\(", s)
                         for s in self._base_options]
            input_opts = [re.sub(r"\[(\d+)\]", r"'[\1]'", s)
                          for s in self.input_options]
            output_opts = [re.sub(r"\)", r"\\)", s)
                           for s in self.output_options]
        return ([self._executable] + base_opts + input_opts + output_opts)

class FFprobeCommand(ShellCommand):
    """An ffprobe shell command."""
    _executable = distutils.spawn.find_executable("ffprobe")
    _base_options = ["-loglevel", "error"]

class FFmpegCommand(ShellCommand):
    """A "simple" ffmpeg shell command."""
    _executable = distutils.spawn.find_executable("ffmpeg")
    _base_options = ["-y", "-loglevel", "error", "-nostdin"]

class FFmpegConcatCommand(FFmpegCommand):
    """An ffmpeg shell command with a complex concat filter."""
    def __init__(self, input_options=[], output_options=[]):
        super(FFmpegConcatCommand, self).__init__(
            input_options, output_options)
        self.prepend_output_options(["-codec:a", "pcm_s16le",
                                     "-ac", "1",
                                     "-codec:v", "h264",
                                     "-pix_fmt", "yuv420p",
                                     "-map", "[vconc]",
                                     "-map", "[anorm]"])
        self.filters = []
    
    def append_filter(self, filter):
        """Append a filter to the filters list."""
        self.filters.append(filter)
        
    def append_normalisation_filter(self):
        """Append a normalisation audio filter to the complex filter."""
        self.append_filter("[aconc] dynaudnorm=r=0.25:f=10:b=y [anorm]")
    
    def append_concat_filter(self, type, segments=[]):
        """Append a concat filter to the filters list"""
        if (len(segments) > 1):
            self.append_filter(
                "{inspecs} concat=n={n}:v={v}:a={a} [{t}conc]".format(
                    inspecs=" ".join([s.output_stream_specifier()
                                      for s in segments]),
                    n=len(segments), v=int(type == "v"),
                    a=int(type == "a"), t=type))
        elif (len(segments) == 1):
            self.append_filter(
                "{inspec} {a}null [{t}conc]".format(
                    inspec=segments[0].output_stream_specifier(),
                    a=type if type == "a" else "", t=type))
        
    def build_complex_filter(self):
        """Build the complete complex filter.
        
        Filters in the filtergraph are separated by ";".
        """
        return "{f}".format(f=";".join(self.filters))
    
    def command_items(self, debug=False):
        """Return the list of items representing the command."""
        complex_filter = self.build_complex_filter()
        output_opts = self.output_options
        if (debug):
            # Wrap the output streams and the entire complex filter
            # in 'single quotes', so that we can copy and paste the
            # command string directly into the shell for testing.
            complex_filter = "'{f}'".format(f=complex_filter)
            output_opts = [re.sub(r"\[(\w+)\]", r"'[\1]'", s)
                           for s in self.output_options]
        return ([self._executable] + self._base_options + self.input_options +
                ["-filter_complex", complex_filter] + output_opts)

if (__name__ == "__main__"):
    print ShellCommand()
    print ConvertCommand(input_options=["in.pdf[12]"], output_options=["out.png"])
    print FFprobeCommand(input_options=["-i", "in.mov"])
    print FFmpegCommand(input_options=["-i", "in.mov"],
                        output_options=["out.mov"])
    concat = FFmpegConcatCommand(input_options=["-i", "in.mov"],
                                 output_options=["out.mov"])
    concat.append_normalisation_filter()
    print concat

#!/usr/bin/env python

import distutils.spawn
import re
import subprocess

class ShellCommand(object):
    """A shell command.
    
    _executable contains the full path to the relevant executable.
    
    _base_options is a list of standard general options for this
    command.
    """
    _executable = ""
    _base_options = []
    
    def __init__(self, options=[]):
        self.options = options
    
    def __repr__(self):
        return "<{cls}: {cmd}>".format(
            cls=self.__class__.__name__,
            cmd=" ".join(self.command_items(True)))
    
    def command_items(self, debug=False):
        """Return the list of items representing the command."""
        return ([self._executable] + self._base_options + self.options)
    
    def run(self):
        """Execute the command in a subprocess."""
        return subprocess.call(self.command_items())
    
    def get_output(self):
        """Execute the command in a subprocess and return the output."""
        return subprocess.check_output(self.command_items())

class ConvertCommand(ShellCommand):
    """An ImageMagick convert command."""
    _executable = distutils.spawn.find_executable("convert")
    _base_options = ["-scale", "2048x1536", "-density", "600",
                     "-background", "white", "-flatten"]

class FFprobeCommand(ShellCommand):
    """An ffprobe shell command."""
    _executable = distutils.spawn.find_executable("ffprobe")
    _base_options = ["-loglevel", "error"]

class FFmpegCommand(ShellCommand):
    """A "simple" ffmpeg shell command."""
    _executable = distutils.spawn.find_executable("ffmpeg")
    _base_options = ["-y", "-loglevel", "error", "-nostdin"]

def __init__(self, input_options=[], output_options=[]):
        self.input_options = input_options
        self.output_options = output_options
    
    def append_input_options(self, items=[]):
        """Add a list of items to the end of the input options."""
        self.input_options += items
    
    def prepend_input_options(self, items=[]):
        """Add a list of items at the front of the input options."""
        self.input_options = items + self.input_options
    
    def append_output_options(self, items=[]):
        """Add a list of items to the end of the output options."""
        self.output_options += items
    
    def prepend_output_options(self, items=[]):
        """Add a list of items at the front of the output options."""
        self.output_options = items + self.output_options
    
    def command_items(self, debug=False):
        """Return the list of items representing the command."""
        return ([self._executable] + self._base_options +
                self.input_options + self.output_options)

if (__name__ == "__main__"):
    print ShellCommand()
    print ConvertCommand(options=["in.pdf"])
    print FFprobeCommand(options=["-i", "in.mov"])
    print FFmpegCommand(input_options=["-i", "in.mov"],
                        output_options=["out.mov"])
    concat = FFmpegConcatCommand(input_options=["-i", "in.mov"],
                                 output_options=["out.mov"])
    concat.append_normalisation_filter()
    print concat

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