#1436 closed defect (worksforme)
transcoding .aac to mp4
| Reported by: | Silly | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | unspecified | Keywords: | aac mov |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
When transcoding .aac audio files to .mp4 (regardless of output audio codec) files, audio is broken (different effect depending on player).
How to reproduce:
I have used Blue Öyster Cult - Don't Fear the Reaper song in stereo 16 bit pcm 44,100Hz .wav file as my source, from which I produced a .aac (-strict experimental -acodec aac) and .mp3 (-acodec libmp3lame).
I then transcoded both into .mp4 in different variations (without parameters to conserve audio or with the parameters above to change audio stream).
The results were consistent, using aac as source broke my mp4 audio regardless of output audio codec.
Using mp3 source went fine regardless of output audio codec.
My ffmpeg was built according to: https://ffmpeg.org/trac/ffmpeg/wiki/CentosCompilationGuide
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52) configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3 libavutil 51. 55.100 / 51. 55.100 libavcodec 54. 23.100 / 54. 23.100 libavformat 54. 6.101 / 54. 6.101 libavdevice 54. 0.100 / 54. 0.100 libavfilter 2. 77.100 / 2. 77.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100 Hyper fast Audio and Video encoder Red Hat Enterprise Linux Server release 5.8 (Tikanga) 2.6.18-194.el5xen
Attachments (1)
Change History (13)
comment:1 by , 13 years ago
comment:2 by , 13 years ago
.wav to .aac:
$ ffmpeg -i the_reaper_stereo_44.1k.wav -strict experimental -acodec aac -y the_reaper_stereo_44.1k.aac
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[wav @ 0x14786100] max_analyze_duration 5000000 reached at 5015510
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'the_reaper_stereo_44.1k.wav':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
Duration: 00:05:09.76, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
[aformat @ 0x1480f760] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
[aresample @ 0x1483a3a0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
Output #0, adts, to 'the_reaper_stereo_44.1k.aac':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
encoder : Lavf54.6.101
Stream #0:0: Audio: aac, 44100 Hz, stereo, flt, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> aac)
Press [q] to stop, [?] for help
size= 4973kB time=00:05:09.77 bitrate= 131.5kbits/s
video:0kB audio:4882kB global headers:0kB muxing overhead 1.868102%
.aac to .mp4
ffmpeg -i the_reaper_stereo_44.1k.aac -y the_reaper_stereo_44.1k.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[aac @ 0x11034100] max_analyze_duration 5000000 reached at 5015510
[aac @ 0x11034100] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'the_reaper_stereo_44.1k.aac':
Duration: 00:05:31.22, bitrate: 122 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, s16, 122 kb/s
Output #0, mp4, to 'the_reaper_stereo_44.1k.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
size= 4966kB time=00:08:41.16 bitrate= 78.1kbits/s
video:0kB audio:4841kB global headers:0kB muxing overhead 2.573264%
comment:3 by , 13 years ago
This has succeeded producing a playable .mp4
.wav to .mp4
$ ffmpeg -i the_reaper_stereo_44.1k.wav -strict experimental -acodec aac -y the_reaper_stereo_44.1k.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[wav @ 0x855d100] max_analyze_duration 5000000 reached at 5015510
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'the_reaper_stereo_44.1k.wav':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
Duration: 00:05:09.76, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
[aformat @ 0x858e660] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
[aresample @ 0x8560680] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
Output #0, mp4, to 'the_reaper_stereo_44.1k.mp4':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, flt, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> aac)
Press [q] to stop, [?] for help
size= 4935kB time=00:05:09.77 bitrate= 130.5kbits/s
video:0kB audio:4882kB global headers:0kB muxing overhead 1.086087%
.aac to .mp3 to .mp4
$ ffmpeg -i the_reaper_stereo_44.1k.aac -strict experimental -acodec libmp3lame -y the_reaper_stereo_44.1k_aac.mp3
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[aac @ 0x13dac100] max_analyze_duration 5000000 reached at 5015510
[aac @ 0x13dac100] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'the_reaper_stereo_44.1k.aac':
Duration: 00:05:31.22, bitrate: 122 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, s16, 122 kb/s
Output #0, mp3, to 'the_reaper_stereo_44.1k_aac.mp3':
Metadata:
TSSE : Lavf54.6.101
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16
Stream mapping:
Stream #0:0 -> #0:0 (aac -> libmp3lame)
Press [q] to stop, [?] for help
size= 4841kB time=00:08:41.16 bitrate= 76.1kbits/s
video:0kB audio:4841kB global headers:0kB muxing overhead 0.003833%
$ ffmpeg -i the_reaper_stereo_44.1k_aac.mp3 -y the_reaper_stereo_44.1k_aac_mp3.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[mp3 @ 0xa6c2100] max_analyze_duration 5000000 reached at 5015510
Input #0, mp3, from 'the_reaper_stereo_44.1k_aac.mp3':
Metadata:
encoder : Lavf54.6.101
Duration: 00:05:09.83, start: 0.000000, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
Output #0, mp4, to 'the_reaper_stereo_44.1k_aac_mp3.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mp3 -> libvo_aacenc)
Press [q] to stop, [?] for help
size= 4895kB time=00:05:09.85 bitrate= 129.4kbits/s
video:0kB audio:4842kB global headers:0kB muxing overhead 1.093016%
$ ffmpeg -i the_reaper_stereo_44.1k_aac.mp3 -strict experimental -acodec aac the_reaper_stereo_44.1k_mp3.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[mp3 @ 0xfc2c100] max_analyze_duration 5000000 reached at 5015510
Input #0, mp3, from 'the_reaper_stereo_44.1k_aac.mp3':
Metadata:
encoder : Lavf54.6.101
Duration: 00:05:09.83, start: 0.000000, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
[aformat @ 0xfc5cf60] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
[aresample @ 0xfc53e80] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
Output #0, mp4, to 'the_reaper_stereo_44.1k_mp3.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, flt, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mp3 -> aac)
Press [q] to stop, [?] for help
size= 4816kB time=00:05:09.84 bitrate= 127.3kbits/s
video:0kB audio:4763kB global headers:0kB muxing overhead 1.111131%
comment:4 by , 13 years ago
Does the following work?
$ ffmpeg -i the_reaper_stereo_44.1k.aac -y -acodec aac -strict experimental the_reaper_stereo_44.1k.mp4
comment:5 by , 13 years ago
Sorry but no:
$ ffmpeg -i the_reaper_stereo_44.1k.aac -strict experimental -acodec aac -y the_reaper_stereo_44.1k_aac.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[aac @ 0xe6fa100] max_analyze_duration 5000000 reached at 5015510
[aac @ 0xe6fa100] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'the_reaper_stereo_44.1k.aac':
Duration: 00:05:31.22, bitrate: 122 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, s16, 122 kb/s
[aformat @ 0xe727c80] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
[aresample @ 0xe718fa0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
Output #0, mp4, to 'the_reaper_stereo_44.1k_aac.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, flt, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (aac -> aac)
Press [q] to stop, [?] for help
size= 5096kB time=00:08:41.15 bitrate= 80.1kbits/s
video:0kB audio:4972kB global headers:0kB muxing overhead 2.505627%
comment:6 by , 13 years ago
Since it works fine here with a random sample, please provide the_reaper_stereo_44.1k.aac
by , 13 years ago
comment:7 by , 13 years ago
Not wanting to get any of us into copyright trouble, I have added another aac file which produced the exact same results.
comment:8 by , 13 years ago
Am I correct that the resulting file plays fine with ffplay and MPlayer?
Which players fail?
comment:10 by , 13 years ago
Installed and tested with Mplayer and it plays perfectly well, unlike with Totem and VLC
comment:11 by , 13 years ago
| Resolution: | → worksforme |
|---|---|
| Status: | new → closed |
Since the resulting files also plays fine with QuickTime, I am closing this ticket.
Please reopen the ticket if you receive any indication that there actually is a bug in FFmpeg (and not in Totem / GStreamer).
comment:12 by , 12 years ago
| Keywords: | mov added; mp4 removed |
|---|
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