[FFmpeg-trac] #3853(undetermined:new): silence in front of generated audio mpegts
FFmpeg
trac at avcodec.org
Thu Aug 14 18:26:17 CEST 2014
#3853: silence in front of generated audio mpegts
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Reporter: mpapp | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Let a.ts be an mpegts with aac encoded audio only.
Then
/ffmpeg/ffmpeg -i a.ts -acodec aac -strict -2 -loglevel debug audio.ts
Input #0, aac, from 'a.ts': Duration: 00:00:05.06, bitrate: 126 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 126 kb/s
if I convert a.ts and audio.ts into .wav I will get two wav files, one of
them has silence in front of it. I used audacity to determine that about
0.031s audio.ts will have some silence.
I can see that a.ts has 215 audio frames and audio.ts 216.
Any explanations why is silence added to ts? As far as I can see it could
be a bug.
Summary: the command at top introduces one extra frame to the start of aac
stream, making aac longer as it should.
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Ticket URL: <https://trac.ffmpeg.org/ticket/3853>
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