diff options
Diffstat (limited to 'src/core.py')
| -rw-r--r-- | src/core.py | 107 |
1 files changed, 90 insertions, 17 deletions
diff --git a/src/core.py b/src/core.py index 4c12209..a0a028b 100644 --- a/src/core.py +++ b/src/core.py @@ -468,7 +468,8 @@ class Core: ''' Constructs the major ffmpeg command used to export the video ''' - duration = str(duration) + safeDuration = "{0:.3f}".format(duration - 0.05) # used by filters + duration = "{0:.3f}".format(duration + 0.1) # used by input sources # Test if user has libfdk_aac encoders = toolkit.checkOutput( @@ -526,35 +527,103 @@ class Core: '-i', inputFile ] + # Add extra audio inputs and any needed avfilters + # NOTE: Global filters are currently hard-coded here for debugging use + globalFilters = 0 # increase to add global filters extraAudio = [ comp.audio() for comp in self.selectedComponents if 'audio' in comp.properties() ] - if extraAudio: - unwantedVideoStreams = [] - for streamNo, params in enumerate(extraAudio): + if extraAudio or globalFilters > 0: + # Add -i options for extra input files + extraFilters = {} + for streamNo, params in enumerate(reversed(extraAudio)): extraInputFile, params = params ffmpegCommand.extend([ - '-t', duration, + '-t', safeDuration, + # Tell ffmpeg about shorter clips (seemingly not needed) + # streamDuration = self.getAudioDuration(extraInputFile) + # if streamDuration > float(safeDuration) + # else "{0:.3f}".format(streamDuration), '-i', extraInputFile ]) - if 'map' in params and params['map'] == '-v': - # a video stream to remove - unwantedVideoStreams.append(streamNo + 1) + # Construct dataset of extra filters we'll need to add later + for ffmpegFilter in params: + if streamNo + 2 not in extraFilters: + extraFilters[streamNo + 2] = [] + extraFilters[streamNo + 2].append(( + ffmpegFilter, params[ffmpegFilter] + )) + + # Start creating avfilters! Popen-style, so don't use semicolons; + extraFilterCommand = [] + + if globalFilters <= 0: + # Dictionary of last-used tmp labels for a given stream number + tmpInputs = {streamNo: -1 for streamNo in extraFilters} + else: + # Insert blank entries for global filters into extraFilters + # so the per-stream filters know what input to source later + for streamNo in range(len(extraAudio), 0, -1): + if streamNo + 1 not in extraFilters: + extraFilters[streamNo + 1] = [] + # Also filter the primary audio track + extraFilters[1] = [] + tmpInputs = { + streamNo: globalFilters - 1 + for streamNo in extraFilters + } + + # Add the global filters! + # NOTE: list length must = globalFilters, currently hardcoded + if tmpInputs: + extraFilterCommand.extend([ + '[%s:a] ashowinfo [%stmp0]' % ( + str(streamNo), + str(streamNo) + ) + for streamNo in tmpInputs + ]) + + # Now add the per-stream filters! + for streamNo, paramList in extraFilters.items(): + for param in paramList: + source = '[%s:a]' % str(streamNo) \ + if tmpInputs[streamNo] == -1 else \ + '[%stmp%s]' % ( + str(streamNo), str(tmpInputs[streamNo]) + ) + tmpInputs[streamNo] = tmpInputs[streamNo] + 1 + extraFilterCommand.append( + '%s %s%s [%stmp%s]' % ( + source, param[0], param[1], str(streamNo), + str(tmpInputs[streamNo]) + ) + ) - if unwantedVideoStreams: - ffmpegCommand.extend(['-map', '0']) - for streamNo in unwantedVideoStreams: - ffmpegCommand.extend([ - '-map', '-%s:v' % str(streamNo) - ]) + # Join all the filters together and combine into 1 stream + extraFilterCommand = "; ".join(extraFilterCommand) + '; ' \ + if tmpInputs else '' ffmpegCommand.extend([ '-filter_complex', - 'amix=inputs=%s:duration=first:dropout_transition=3' % str( - len(extraAudio) + 1 + extraFilterCommand + + '%s amix=inputs=%s:duration=first [a]' + % ( + "".join([ + '[%stmp%s]' % (str(i), tmpInputs[i]) + if i in extraFilters else '[%s:a]' % str(i) + for i in range(1, len(extraAudio) + 2) + ]), + str(len(extraAudio) + 1) ), ]) + # Only map audio from the filters, and video from the pipe + ffmpegCommand.extend([ + '-map', '0:v', + '-map', '[a]', + ]) + ffmpegCommand.extend([ # OUTPUT '-vcodec', vencoder, @@ -573,7 +642,7 @@ class Core: ffmpegCommand.append(outputFile) return ffmpegCommand - def readAudioFile(self, filename, parent): + def getAudioDuration(self, filename): command = [self.FFMPEG_BIN, '-i', filename] try: @@ -588,6 +657,10 @@ class Core: d = d.split(' ')[3] d = d.split(':') duration = float(d[0])*3600 + float(d[1])*60 + float(d[2]) + return duration + + def readAudioFile(self, filename, parent): + duration = self.getAudioDuration(filename) command = [ self.FFMPEG_BIN, |