[FFmpeg-trac] #2439(FFmpeg:new): allow to copy latm aac to raw aac without reencoding audio
FFmpeg
trac at avcodec.org
Sat Apr 6 06:56:06 CEST 2013
#2439: allow to copy latm aac to raw aac without reencoding audio
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Reporter: nars | Type: enhancement
Status: new | Priority: normal
Component: FFmpeg | Version: unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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I would like to purpose an enhancement to ffmpeg, so that it would be
possible to copy latm aac stream to raw aac without reencoding audio,
possibly through a bitstream filter (similar to the existing
aac_adtstoasc), it would allow to do something like:
ffmpeg -i in.ts -vcodec copy -acodec copy -absf aac_latmtoraw out.mkv
ffmpeg already includes code to handle latm aac (then it may be an easy
task?), for eg. this will work on the same source file with latm aac:
ffmpeg -i in.ts -vcodec copy -acodec libvo_aacenc out.mkv
but doing this will obviously reencode aac audio and what I'm suggesting
is a way to convert it from latm to raw aac without the need to reencode
audio.
P.S. This feature would be useful to convert ts files recorded from some
DVB-T streams to mkv, doing copy of latm stream to mkv doesn't seem to be
well supported on many players while raw aac is.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2439>
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