#2686: Native AAC encoder collapses at high bitrates on some samples
-------------------------------------+-------------------------------------
Reporter: Kamedo2 | Owner:
Type: defect | klaussfreire
Priority: normal | Status: open
Version: git-master | Component: avcodec
Keywords: aac | Resolution:
regression | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by Kamedo2):
The new AAC output cannot be decoded properly by the faad decoder.
{{{
ffmpeg77208 -y -i abc\compilation2.wav -c:a aac -b:a 96k out.mp4
}}}
{{{
faad -b 1 out.mp4 out.wav
}}}
results in collapsed sounds.
{{{
ffmpeg77208 -y -i abc\compilation2.wav -c:a aac -b:a 96k out.mp4
}}}
{{{
faad -q -b 4 out.mp4 out.wav
}}}
decoding to 32bit float also results in collapsed sounds.
{{{
ffmpeg77208 -y -i abc\compilation2.wav -c:a aac -b:a 96k out.mp4
}}}
{{{
ffmpeg77208 -y -i out.mp4 -c:a pcm_s16le out.wav
}}}
The same AAC output decoded by the new FFmpeg is OK.
{{{
ffmpeg77208 -y -i abc\compilation2.wav -c:a aac -b:a 96k out.mp4
}}}
{{{
ffmpeg72585 -y -i out.mp4 -c:a pcm_s16le out.wav
}}}
The same AAC output decoded by older FFmpeg is also OK.
{{{
ffmpeg76735 -y -i abc\compilation2.wav -c:a aac -b:a 96k -strict -2
out.mp4
}}}
{{{
faad -b 1 out.mp4 out.wav
}}}
72585, 76735 was OK, but the 76851, 76877, 76976, 77208 suffer the same
problem.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:459>
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