Inner parts ared dumped as MKV. Head and tail of each part are dumped for video and sound.
This commit is contained in:
Frédéric Tronel
94
removeads.py
94
removeads.py
@@ -104,22 +104,61 @@ def getNearestIFrame(inputFile, timestamp, before=True, delta=timedelta(seconds=
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for frame in iframes:
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if before and timedelta(seconds=float(frame['pts_time'])) <= timestamp:
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found = True
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res = frame
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iframe = frame
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if not before and timedelta(seconds=float(frame['pts_time'])) >= timestamp:
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found = True
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res = frame
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iframe = frame
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break
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if found:
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logger.debug("Found: %s" % res)
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its = timedelta(seconds=float(iframe['pts_time']))
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nbFrames = 0
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for frame in frames:
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ts = timedelta(seconds=float(frame['pts_time']))
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if before:
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if its <= ts and ts <= timestamp:
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nbFrames = nbFrames+1
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else:
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if timestamp <= ts and ts <= its:
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nbFrames = nbFrames+1
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else:
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logger.error("Impossible to find I-frame around: %s" % timestamp)
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return(res)
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return(nbFrames-1, iframe)
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else:
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logger.error('Impossible to retrieve video frames inside file around [%s,%s]' % (tbegin, tend))
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return None
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def extractMKVPart(inputFile, outputFile, begin, end):
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inputFile.seek(0,0)
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outputFile.seek(0,0)
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infd = inputFile.fileno()
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outfd = outputFile.fileno()
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set_inheritable(infd, True)
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set_inheritable(outfd, True)
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with Popen(['mkvmerge', '-o', '/proc/self/fd/%d' % outfd, '--split', 'parts:%s-%s' % (begin, end), '/proc/self/fd/%d' % infd], stdout=PIPE, close_fds=False) as mkvmerge:
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for line in TextIOWrapper(mkvmerge.stdout, encoding="utf-8"):
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print(line, end='')
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def extractPictures(inputFile, begin, nbFrames, prefix, width=640, height=480):
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inputFile.seek(0,0)
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infd = inputFile.fileno()
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set_inheritable(infd, True)
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with Popen(['ffmpeg', '-loglevel', 'quiet', '-ss', '%s'%begin, '-i', '/proc/self/fd/%d' % infd, '-s', '%dx%d'%(width, height), '-vframes', '%d'%nbFrames, '-c:v', 'ppm', '-f', 'image2', '%s-%%03d.ppm' % prefix], stdout=PIPE, close_fds=False) as ffmpeg:
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for line in TextIOWrapper(ffmpeg.stdout, encoding="utf-8"):
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print(line, end='')
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def extractSound(inputFile, begin, outputFile, channel=0, nbPackets=10, sampleRate=48000, nbChannels=2):
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inputFile.seek(0,0)
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infd = inputFile.fileno()
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set_inheritable(infd, True)
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with Popen(['ffmpeg', '-loglevel', 'quiet', '-ss', '%s'%begin, '-i', '/proc/self/fd/%d' % infd, '-frames:a:%d' % channel, '%d' % nbPackets,
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'-c:a', 'pcm_s32le', '-sample_rate', '%d' % 48000, '-channels', '%d' % 2, '-f', 's32le', '%s.pcm' % outputFile], stdout=PIPE, close_fds=False) as ffmpeg:
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for line in TextIOWrapper(ffmpeg.stdout, encoding="utf-8"):
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print(line, end='')
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def parseTimeInterval(interval):
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logger = logging.getLogger(__name__)
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@@ -287,6 +326,8 @@ def main():
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for stream in streams:
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if stream['codec_type'] == 'video' and stream['disposition']['default'] == 1:
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mainVideo = stream
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width = stream['width']
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height = stream['height']
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if mainVideo == None:
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logger.error('Impossible to find main video stream.')
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@@ -305,17 +346,50 @@ def main():
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if postFrame == None:
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exit(-1)
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nbPreFrame, preIFrame = preFrame
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nbPostFrame, postIFrame = postFrame
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print(preFrame)
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print(postFrame)
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print("Found pre I-frame and %d frames between: %s" % (nbPreFrame, preIFrame))
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print("Found I-frame and %d frames between: %s" % (nbPostFrame, postIFrame))
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if timedelta(seconds=float(preFrame['pts_time'])) == ts1:
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preIFrameTS = timedelta(seconds=float(preIFrame['pts_time']))
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postIFrameTS = timedelta(seconds=float(postIFrame['pts_time']))
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if ts1 < preIFrameTS:
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for stream in streams:
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if stream['codec_type'] == 'video':
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extractPictures(inputFile=mkv, begin=ts1, nbFrames=nbPreFrame, prefix="pre-part-%d" % partnum, width=width, height=height)
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elif stream['codec_type'] == 'audio':
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print("Extracting audio stream: %s" % stream)
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sampleRate = stream['sample_rate']
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nbChannel = stream['channels']
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extractSound(inputFile=mkv, begin=ts1, nbPackets=nbPreFrame, outputFile="pre-part-%d" % partnum, sampleRate=sampleRate, nbChannels=nbChannels)
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else:
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pass
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else:
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# Nothing to do
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pass
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if postIFrameTS < ts2:
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for stream in streams:
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if stream['codec_type'] == 'video':
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extractPictures(inputFile=mkv, begin=postIFrameTS, nbFrames=nbPostFrame, prefix="post-part-%d" % partnum, width=width, height=height)
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elif stream['codec_type'] == 'audio':
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print("Extracting audio stream: %s" % stream)
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sampleRate = stream['sample_rate']
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nbChannel = stream['channels']
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# TODO: how many packets should be dumped ...
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# TODO: take into account multiple sound tracks ...
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extractSound(inputFile=mkv, begin=postIFrameTS, nbPackets=nbPostFrame, outputFile="post-part-%d" % partnum, sampleRate=sampleRate, nbChannels=nbChannels)
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else:
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pass
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else:
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# Nothing to do !
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pass
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if timedelta(seconds=float(postFrame['pts_time'])) == ts2:
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# Nothing to do !
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pass
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# Creating MKV file that corresponds to current part between I-frames
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with open('part-%d.mkv' % partnum, 'w') as partmkv:
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extractMKVPart(inputFile=mkv, outputFile=partmkv, begin=preIFrameTS, end=postIFrameTS)
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# Trouver l'estampille de la trame 'I' la plus proche (mais postérieure) au début de la portion.
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# Trouver l'estampille de la trame 'I' la plus proche (mais antérieure) à la fin de la portion.
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