[FFmpeg-trac] #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples
FFmpeg
trac at avcodec.org
Tue Dec 8 03:53:55 CET 2015
#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):
Another crash example, probably another arithmetic overflow like
comment:440. I think anything above -q:a 3 should be clipped to -q:a 3,
because I don't think of any practical use, and to simplify the testing
procedure.
[[Image(http://listening-test.coresv.net/img2/noexp1.png)]]
[[Image(http://listening-test.coresv.net/img2/noexp2.png)]]
[[Image(http://listening-test.coresv.net/img2/noexp3.png)]]
{{{
ffmpeg77126 -y -i FFmpeg_anmr_error6.flac -c:a aac -q:a 1280k out.mp4
ffmpeg version N-77126-g357c626 Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 5.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-
libmp3
lame --enable-libvo-aacenc --enable-libvorbis --enable-libfdk-aac
--enable-w32th
reads --extra-ldflags=-static --extra-cflags='-mtune=nocona'
--optflags=-O2
libavutil 55. 10.100 / 55. 10.100
libavcodec 57. 17.100 / 57. 17.100
libavformat 57. 19.100 / 57. 19.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 20.100 / 6. 20.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, flac, from 'FFmpeg_anmr_error6.flac':
Duration: 00:00:10.00, start: 0.000000, bitrate: 218 kb/s
Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:453>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list