#2686: Native AAC encoder collapses at high bitrates on some samples
-------------------------------------+-------------------------------------
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 |
-------------------------------------+-------------------------------------
Comment (by Kamedo2):
FFmpeg crashes when the sampling rate is 7350Hz, both vbr and abr.
Insignificant, but in case you have missed something.
It worked on 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
16000, 8000Hz.
{{{
ffmpeg56668.exe -v 9 -loglevel 99 -y -i ffmpeg_aac_lead_voice.flac -c:a
aac -str
ict -2 -ar 7350 -b:a 128k ffmpeg_aac_lead_voiceb128.mp4
ffmpeg version N-56667-g32cde96 Copyright (c) 2000-2013 the FFmpeg
developers
built on Sep 29 2013 23:03:27 with gcc 4.8.1 (GCC)
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-
libfdk
-aac --enable-libfaac --enable-libmp3lame --extra-ldflags=-static --extra-
cflags
='-march=nocona -mfpmath=sse' --optflags=-O2
libavutil 52. 46.100 / 52. 46.100
libavcodec 55. 33.100 / 55. 33.100
libavformat 55. 18.102 / 55. 18.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 87.100 / 3. 87.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument
'9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level)
with argument '99'.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argu
ment '1'.
Reading option '-i' ... matched as input file with argument
'\ffmpeg_aac_lead_vo
ice.flac'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument
'aac'
.
Reading option '-strict' ... matched as AVOption 'strict' with argument
'-2'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate
(in Hz)
) with argument '7350'.
Reading option '-b:a' ... matched as option 'b' (video bitrate (please use
-b:v)
) with argument '128k'.
Reading option 'ffmpeg_aac_lead_voiceb128.mp4' ...
matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file ffmpeg_aac_
lead_voice.flac.
Successfully parsed a group of options.
Opening an input file: ffmpeg_aac_lead_voice.flac.
[flac @ 0159f2e0] Format flac probed with size=2048 and score=50
[flac @ 0159f2e0] File position before avformat_find_stream_info() is 4374
[flac @ 030866e0] sample/frame number mismatch in adjacent frames
Last message repeated 114 times
[flac @ 0159f2e0] max_analyze_duration 5000000 reached at 5015510
microseconds
[flac @ 0159f2e0] File position after avformat_find_stream_info() is
377856
Input #0, flac, from 'ffmpeg_aac_lead_voice.flac':
Metadata:
REPLAYGAIN_TRACK_PEAK: 0.67306519
REPLAYGAIN_TRACK_GAIN: -4.18 dB
REPLAYGAIN_ALBUM_PEAK: 0.67306519
REPLAYGAIN_ALBUM_GAIN: -4.18 dB
COMMENT : Encoded by FLAC v1.1.2a with FLAC Frontend v1.7.1
Duration: 00:00:24.68, bitrate: 471 kb/s
Stream #0:0, 50, 1/44100: Audio: flac, 44100 Hz, mono, s16
Successfully opened the file.
Parsing a group of options: output file ffmpeg_aac
_lead_voiceb128.mp4.
Applying option c:a (codec name) with argument aac.
Applying option ar (set audio sampling rate (in Hz)) with argument 7350.
Applying option b:a (video bitrate (please use -b:v)) with argument 128k.
Successfully parsed a group of options.
Opening an output file: ffmpeg_aac_lead_voiceb128.
mp4.
Successfully opened the file.
detected 8 logical cores
[graph 0 input from stream 0:0 @ 0159f100] Setting 'time_base' to value
'1/44100
'
[graph 0 input from stream 0:0 @ 0159f100] Setting 'sample_rate' to value
'44100
'
[graph 0 input from stream 0:0 @ 0159f100] Setting 'sample_fmt' to value
's16'
[graph 0 input from stream 0:0 @ 0159f100] Setting 'channel_layout' to
value '0x
4'
[graph 0 input from stream 0:0 @ 0159f100] tb:1/44100 samplefmt:s16
samplerate:4
4100 chlayout:0x4
[audio format for output stream 0:0 @ 03142120] Setting 'sample_fmts' to
value '
fltp'
[audio format for output stream 0:0 @ 03142120] Setting 'sample_rates' to
value
'7350'
[audio format for output stream 0:0 @ 03142120] auto-inserting filter
'auto-inse
rted resampler 0' between the filter 'Parsed_anull_0' and the filter
'audio form
at for output stream 0:0'
[AVFilterGraph @ 030df400] query_formats: 4 queried, 6 merged, 3 already
done, 0
delayed
[auto-inserted resampler 0 @ 0307a240] ch:1 chl:mono fmt:s16 r:44100Hz ->
ch:1 c
hl:mono fmt:fltp r:7350Hz
[aac @ 030ed9a0] Too many bits per frame requested, clamping to max
}}}
How is the development going?
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:201>
FFmpeg <http://ffmpeg.org>
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