I guess this implies the audio has been re-encoded, from VBR to CBR, presumably losing some audio data in re- (lossy) compression (unless such BR conversion is cleverer than that). this produced an file of AAC with CBR, 93.3 kb/s, size 5.1 MB
It makes ffmpeg omit the decoding and encoding step. įfmpeg -i infile.ts -codec copy outfile.m4a Stream copy is a mode selected by supplying the copy parameter to the -codec option. I believe this only works for simple filtergrahps that contain exactly one input and one output. In this example, filtering is a file with the filtergraph. I assume this reduction in size is due to the TS format's transmission-error tolerance data having been "filtered out". You can use the -filterscript option: ffmpeg -i input -filterscript filtering -codec:a copy output.mkv. produced an file of AAC with VBR, 162 kb/s, size 7.1 MB The source file, with extension, is VBR, overall 162 kb/s, size 8.5 MB However there seem to be two ways of getting ffmpeg to do this, producing different results. This function makes a deep copy of the frame if it isn't writeable, so we can use the same logic to make a deep copy of the frame here: AVFrame copyFrame avframealloc () copyFrame->format frame->format copyFrame->width frame->width copyFrame->height frame. My intention is (or was) to perform this without re-encoding. In that case, you can look at the source code of the avframemakewritable. There seems to be a known issue about it but I am trying to see if there is any workaround.I am using ffmpeg to convert AAC audio from TS (Transport Stream) container format to M4A container format. Unsupported codec id in stream 1Ĭould not write header for output file #0 (incorrect codec parameters ?): Invalid argument Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 500x500, 90k tbr, 90k tbn, 90k tbc (attached pic) Wir waren lange nicht mehr zusammen und hatten wie gewohnt alle auf einmal viele Fragen zur: Küchenplanung, Hotelgeschichte, Filetier-Tech Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 152 kb/sĬomment : DocPhil, Cindy, Frau Katja und Onkel Andi zu Besuch bei Susanne DeOcampo-Herrmann, der Chefköchin im Hotel Berlin. I am currently using: ffmpeg -i input.ogg -map 0 -c copy output.oggīut for example on this file it fails with: Input #0, ogg, from 'KR369.ogg':ĭuration: 01:32:53.80, start: 0.000000, bitrate: 164 kb/s The issue is that it fails on files with covers. ffmpeg is pretty good at reconstructing files and can remove various strangeness various encoders insert. I am trying to use ffmpeg to copy files with all streams intact to fix various issues with files.
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