#2686: Native AAC encoder collapses at high bitrates on some samples
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Reporter: Kamedo2 | Owner:
Type: defect | Status: open
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: aac | Blocked By:
regression | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
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Comment (by Kamedo2):
The bug is most obvious at -b:a 224k. The file is 672,362 Bytes, 267 kbps.
{{{
ffmpeg_2.1v8fix -y -i ItCouldBeSweet.wav -vn -c:a aac -strict -2 -b:a 224k
ItCouldBeSweet_224k.mp4
}}}
{{{
ffmpeg version 2.1.git Copyright (c) 2000-2014 the FFmpeg developers
built on May 3 2014 15:51:52 with gcc 4.8.1 (GCC)
configuration: --enable-gpl --enable-version3 --enable-nonfree --extra-
ldflags=-static --extra-cflags='-march=native -mfpmath=sse' --optflags=-O2
libavutil 52. 63.101 / 52. 63.101
libavcodec 55. 52.101 / 55. 52.101
libavformat 55. 32.101 / 55. 32.101
libavdevice 55. 9.101 / 55. 9.101
libavfilter 4. 1.102 / 4. 1.102
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'ItCouldBeSweet.wav':
Duration: 00:00:20.02, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Output #0, mp4, to 'ItCouldBeSweet.ffv8f_224k.mp4':
Metadata:
encoder : Lavf55.32.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
fltp, 224 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> aac)
Press [q] to stop, [?] for help
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:269>
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