#9667: HE-AAC (not in mp4) decode samples off by one sample-time
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Reporter: Nick | Owner: (none)
Type: defect | Status: reopened
Priority: minor | Component: avcodec
Version: git-master | Resolution:
Keywords: aac | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Changes (by Balling):
* status: closed => reopened
* resolution: fixed =>
* reproduced: 0 => 1
* summary: HE-AAC decode samples off by one sample-time => HE-AAC (not in
mp4) decode samples off by one sample-time
Comment:
Since it was bothering me, I checked 48k flac decoded to wav and then
encoded that way to .aac and .mp4 with libfdk_aac. I then decoded both to
wav with native decoder. mp4 is perfectly aligned in Audacity, '''so
removal of initial priming is sample accurate'''. (Remainder is still not
removed.)
'''Now, I check''' raw .aac file. Indeed if you will remove 5057 (counting
from 0) in Audacity you need to remove one more sample to get in sync. So
reopening.
AGAIN, mp4 editlist is not affected!
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Ticket URL: <https://trac.ffmpeg.org/ticket/9667#comment:9>
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