[FFmpeg-trac] #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples
FFmpeg
trac at avcodec.org
Wed Jan 13 20:39:38 CET 2016
#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 |
-------------------------------------+-------------------------------------
Comment (by Kamedo2):
Now the faad decode and the low bitrate encodes above are properly working
on x86.
But this will fail.
{{{
ffmpeg77827 -y -i short_block_test_2.flac -c:a aac -b:a 8k -cutoff 15000
-ar 48000 out.mp4
ffmpeg version N-77827-g9006567 Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 5.2.0 (GCC)
configuration:
libavutil 55. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
Input #0, flac, from 'short_block_test_2.flac':
Duration: 00:00:15.00, start: 0.000000, bitrate: 91 kb/s
Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
Output #0, mp4, to 'out.mp4':
Metadata:
encoder : Lavf57.21.101
Stream #0:0: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz,
stereo, flt
p (16 bit), 8 kb/s
Metadata:
encoder : Lavc57.22.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (flac (native) -> aac (native))
Press [q] to stop, [?] for help
Assertion diff >= 0 && diff <= 120 failed at libavcodec/aacenc.c:363
This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:487>
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