#3361 closed defect (invalid)
aac_he mono not recogized (reported as stereo)
| Reported by: | Christian Ebert | Owned by: | |
|---|---|---|---|
| Priority: | important | Component: | avcodec |
| Version: | git-master | Keywords: | aac regression |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
Channel count and channel layout for aac_he mono is always reported (decoded?) as stereo.
How to reproduce:
ffmpeg -i in.aiff -c:a libfdk_aac -profile:a aac_he -b:a 32k -ac 1 fdk-he-mono.m4a
ffmpeg version N-60230-gcfe282e Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 29 2014 14:17:03 with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-network --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 52. 63.100 / 52. 63.100
libavcodec 55. 49.101 / 55. 49.101
libavformat 55. 28.101 / 55. 28.101
libavdevice 55. 7.100 / 55. 7.100
libavfilter 4. 1.101 / 4. 1.101
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, aiff, from 'in.aiff':
Duration: 00:00:30.43, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le (sowt / 0x74776F73), 44100 Hz, stereo, s16, 1411 kb/s
Output #0, ipod, to 'fdk-he-mono.m4a':
Metadata:
encoder : Lavf55.28.101
Stream #0:0: Audio: aac (libfdk_aac) (HE-AAC) (mp4a / 0x6134706D), 44100 Hz, mono, s16, 32 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> libfdk_aac)
Press [q] to stop, [?] for help
size= 123kB time=00:00:30.44 bitrate= 33.0kbits/s
video:0kB audio:119kB subtitle:0 global headers:0kB muxing overhead 2.760628%
~/Music/Blacktrash$ ffprobe -show_streams fdk-he-mono.m4a 2>/dev/null | fgrep chan
channels=2
channel_layout=stereo
Mono in normal profile is recognized correctly:
ffmpeg -i in.aiff -c:a libfdk_aac -b:a 32k -ac 1 fdk-mono.m4a
ffmpeg version N-60230-gcfe282e Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 29 2014 14:17:03 with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-network --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 52. 63.100 / 52. 63.100
libavcodec 55. 49.101 / 55. 49.101
libavformat 55. 28.101 / 55. 28.101
libavdevice 55. 7.100 / 55. 7.100
libavfilter 4. 1.101 / 4. 1.101
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, aiff, from 'in.aiff':
Duration: 00:00:30.43, start: 0.000000, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le (sowt / 0x74776F73), 44100 Hz, stereo, s16, 1411 kb/s
Output #0, ipod, to 'fdk-mono.m4a':
Metadata:
encoder : Lavf55.28.101
Stream #0:0: Audio: aac (libfdk_aac) (mp4a / 0x6134706D), 44100 Hz, mono, s16, 32 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> libfdk_aac)
Press [q] to stop, [?] for help
size= 125kB time=00:00:30.44 bitrate= 33.7kbits/s
video:0kB audio:119kB subtitle:0 global headers:0kB muxing overhead 4.902738%
ffprobe -show_streams fdk-mono.m4a 2>/dev/null | fgrep chan
channels=1
channel_layout=mono
I first believed this was a problem with fdk-aac, but a HE-AAC by iTunes yields the same:
$ ffprobe -show_streams itunes-he-mono.m4a 2>/dev/null | fgrep chan channels=2 channel_layout=stereo
See also:
http://sourceforge.net/p/opencore-amr/mailman/message/31874638/
ff.
and:
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2014-January/019559.html
Note that profile is always diagnosed as unknown:
ffprobe -show_streams fdk-he-mono.m4a 2>/dev/null | fgrep profile profile=unknown ffprobe -show_streams fdk-mono.m4a 2>/dev/null | fgrep profile profile=unknown ffprobe -show_streams itunes-he-mono.m4a 2>/dev/null | fgrep profile profile=unknown
Attachments (3)
Change History (29)
comment:1 by , 11 years ago
| Keywords: | aac added |
|---|
comment:2 by , 11 years ago
Of the source or of the result? If the result, only the one created by ffmpeg/fdk-aac or also iTunes?
comment:3 by , 11 years ago
A sample that is shown as "mono" in iTunes / QuickTime but "stereo" by FFmpeg seems needed to me.
Of course it is *very* useful that you explained how the file was created that FFmpeg has a problem with (and it could be argued that we should do the work) but imo, a sample is generally needed for bug reports.
comment:4 by , 11 years ago
Attached file is reported as mono by QuickTime. You cannot import it into iTunes because for simplicity's sake it was not created with -signaling implicit which would open another can of worms, see: http://sourceforge.net/p/opencore-amr/mailman/message/31876971/ et al
comment:5 by , 11 years ago
| Component: | undetermined → avcodec |
|---|---|
| Keywords: | regression added |
| Priority: | normal → important |
Martin claims this is a libavcodec regression.
follow-up: 7 comment:6 by , 11 years ago
This fixes it but breaks some reference aac bitstreams we have in fate
diff --git a/libavcodec/mpeg4audio.c b/libavcodec/mpeg4audio.c
index 68448e6..e9b908d 100644
--- a/libavcodec/mpeg4audio.c
+++ b/libavcodec/mpeg4audio.c
@@ -142,6 +142,9 @@ int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf,
//PS requires SBR
if (!c->sbr)
c->ps = 0;
+ if (c->sbr == 1 && c->ps == -1)
+ c->ps = 0;
+
//Limit implicit PS to the HE-AACv2 Profile
if ((c->ps == -1 && c->object_type != AOT_AAC_LC) || c->channels & ~0x01)
c->ps = 0;
comment:7 by , 11 years ago
Replying to michael:
This fixes it but breaks some reference aac bitstreams we have in fate
Are the streams in question aac_he_v2? If yes, the fix should probably contain an excluding conditional, as v2 cannot be mono, see: http://sourceforge.net/p/opencore-amr/mailman/message/31877351/
comment:8 by , 11 years ago
how do you detect v2 ?
if it requires decoding the whole stream that would be unpractical (for realtime streams for example)
See: fate-suite/aac/CT_DecoderCheck/sbr_bic-ps_i.3gp
for the file that does contain PS with similar header
comment:9 by , 10 years ago
is there any software that can detect that this is mono without (potentially) reading the whole file ?
also if this is a regression, with which version did it work ?
follow-up: 12 comment:11 by , 10 years ago
if theres no way to solve this except scanning the whole file then this is not really fixable and thus also not a bug and should be closed
comment:12 by , 10 years ago
Replying to michael:
if theres no way to solve this except scanning the whole file then this is not really fixable and thus also not a bug and should be closed
Before closing it should be documented though, shouldn't it?
And: the original report is not about aac_he_v2, but aac_he.
follow-up: 14 comment:13 by , 10 years ago
With the fdk git HEAD and ffmpeg 7656c4c aac_he mono results
- are reported as
profile=HE-AACv2 - ffplay'ing mpegts streams report
[aac @ 0x7fab9a035800] ChannelElement 1.0 missing
where I guess 2. is a consequence of 1. because aac_he_v2 is indeed stereo only.
follow-ups: 15 16 comment:14 by , 10 years ago
Replying to blacktrash:
- ffplay'ing mpegts streams report
[aac @ 0x7fab9a035800] ChannelElement 1.0 missing
Please provide command line and console output and a sample.
comment:15 by , 10 years ago
Replying to cehoyos:
Replying to blacktrash:
- ffplay'ing mpegts streams report
[aac @ 0x7fab9a035800] ChannelElement 1.0 missingPlease provide command line and console output and a sample.
Does not happen with mp4, but with mpegts:
$ ffmpeg -i BigBuckBunny_640x360.m4v -c:v copy -c:a libfdk_aac -profile:a aac_he -b:a 64k -ac 1 test.mp4
ffmpeg version N-67514-g7656c4c Copyright (c) 2000-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'BigBuckBunny_640x360.m4v':
Metadata:
major_brand : M4V
minor_version : 1
compatible_brands: M4V M4A mp42isom
creation_time : 2008-06-03 05:23:28
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
date : 2008
Duration: 00:09:56.46, start: 0.000000, bitrate: 1626 kb/s
Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Sound Media Handler
Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 640x360, 1495 kb/s, 24 fps, 24 tbr, 2400 tbn, 4800 tbc (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Video Media Handler
Output #0, mp4, to 'test.mp4':
Metadata:
major_brand : M4V
minor_version : 1
compatible_brands: M4V M4A mp42isom
date : 2008
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
encoder : Lavf56.12.103
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x360, q=2-31, 1495 kb/s, 24 fps, 19200 tbn, 2400 tbc (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Video Media Handler
Stream #0:1(eng): Audio: aac (libfdk_aac) (HE-AAC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, s16, 64 kb/s (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Sound Media Handler
encoder : Lavc56.12.100 libfdk_aac
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
frame=14316 fps=1979 q=-1.0 Lsize= 113804kB time=00:09:56.49 bitrate=1562.9kbits/s
video:108900kB audio:4661kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.214162%
$ ffprobe -v quiet -select_streams a -show_entries stream=profile test.mp4
[STREAM]
profile=HE-AAC
[/STREAM]
$ ffmpeg -i test.mp4 -c copy -bsf:v h264_mp4toannexb -map 0 test.ts
ffmpeg version N-67514-g7656c4c Copyright (c) 2000-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
date : 2008
encoder : Lavf56.12.103
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
Duration: 00:09:56.59, start: 0.114694, bitrate: 1562 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 640x360, 1495 kb/s, 24 fps, 24 tbr, 19200 tbn, 38400 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (HE-AAC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64 kb/s (default)
Metadata:
handler_name : SoundHandler
Output #0, mpegts, to 'test.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
date : 2008
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
encoder : Lavf56.12.103
Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 640x360, q=2-31, 1495 kb/s, 24 fps, 90k tbn, 19200 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 64 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=14316 fps=0.0 q=-1.0 Lsize= 124413kB time=00:09:56.61 bitrate=1708.3kbits/s
video:108879kB audio:4661kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.576361%
$ ffprobe -v quiet -select_streams a -show_entries stream=profile test.ts
[PROGRAM]
[STREAM]
profile=HE-AACv2
[/STREAM]
[/PROGRAM]
[STREAM]
profile=HE-AACv2
[/STREAM]
$ ffplay test.ts
ffplay version N-67514-g7656c4c Copyright (c) 2003-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[h264 @ 0x7fd56a008800] non-existing SPS 0 referenced in buffering period
Last message repeated 1 times
Input #0, mpegts, from 'test.ts':
Duration: 00:09:56.61, start: 1.400000, bitrate: 1708 kb/s
Program 1
Metadata:
service_name : Big Buck Bunny
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m/smpte170m/bt709), 640x360, 24 fps, 24 tbr, 90k tbn, 180k tbc
Stream #0:1[0x101](eng): Audio: aac (HE-AACv2) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 67 kb/s
[h264 @ 0x7fd56a80f200] non-existing SPS 0 referenced in buffering period
[h264 @ 0x7fd56a008800] non-existing SPS 0 referenced in buffering period
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing
Last message repeated 9 times
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing sq= 0B f=0/0
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing sq= 0B f=0/0
Last message repeated 1 times
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing sq= 0B f=0/0
Last message repeated 1 times
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing sq= 0B f=0/0
[aac @ 0x7fd56a01ba00] ChannelElement 1.0 missing sq= 0B f=0/0
# [... and so on ...]
comment:16 by , 10 years ago
Replying to cehoyos:
Replying to blacktrash:
- ffplay'ing mpegts streams report
[aac @ 0x7fab9a035800] ChannelElement 1.0 missingPlease provide command line and console output and a sample.
Or, without intermediate bsf step:
$ ffmpeg -i BigBuckBunny_640x360.m4v -c:v libx264 -c:a libfdk_aac -profile:a aac_he -b:a 64k -ac 1 test.ts
ffmpeg version N-67514-g7656c4c Copyright (c) 2000-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'BigBuckBunny_640x360.m4v':
Metadata:
major_brand : M4V
minor_version : 1
compatible_brands: M4V M4A mp42isom
creation_time : 2008-06-03 05:23:28
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
date : 2008
Duration: 00:09:56.46, start: 0.000000, bitrate: 1626 kb/s
Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Sound Media Handler
Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 640x360, 1495 kb/s, 24 fps, 24 tbr, 2400 tbn, 4800 tbc (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Video Media Handler
[libx264 @ 0x7fe66b800c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x7fe66b800c00] profile High, level 3.0
Output #0, mpegts, to 'test.ts':
Metadata:
major_brand : M4V
minor_version : 1
compatible_brands: M4V M4A mp42isom
date : 2008
copyright : © 2008 Blender Foundation | www.bigbuckbunny.org
title : Big Buck Bunny
artist : Peach Open Movie Team
composer : Sacha Goedegebure / Ton Roosendaal
encoder : Lavf56.12.103
Stream #0:0(eng): Video: h264 (libx264), yuv420p, 640x360, q=-1--1, 24 fps, 90k tbn, 24 tbc (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Video Media Handler
encoder : Lavc56.12.100 libx264
Stream #0:1(eng): Audio: aac (libfdk_aac) (HE-AAC), 44100 Hz, mono, s16, 64 kb/s (default)
Metadata:
creation_time : 2008-06-03 05:23:28
handler_name : Apple Sound Media Handler
encoder : Lavc56.12.100 libfdk_aac
Stream mapping:
Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
frame=14316 fps=305 q=-1.0 Lsize= 48501kB time=00:09:56.49 bitrate= 666.1kbits/s
video:38402kB audio:4661kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 12.626186%
[libx264 @ 0x7fe66b800c00] frame I:154 Avg QP:17.40 size: 37747
[libx264 @ 0x7fe66b800c00] frame P:5550 Avg QP:22.44 size: 4792
[libx264 @ 0x7fe66b800c00] frame B:8612 Avg QP:27.20 size: 803
[libx264 @ 0x7fe66b800c00] consecutive B-frames: 12.4% 17.7% 13.4% 56.4%
[libx264 @ 0x7fe66b800c00] mb I I16..4: 35.4% 26.7% 37.9%
[libx264 @ 0x7fe66b800c00] mb P I16..4: 3.2% 4.2% 1.7% P16..4: 33.3% 7.3% 4.9% 0.0% 0.0% skip:45.3%
[libx264 @ 0x7fe66b800c00] mb B I16..4: 0.2% 0.5% 0.2% B16..8: 24.6% 1.7% 0.5% direct: 0.8% skip:71.6% L0:49.5% L1:44.9% BI: 5.6%
[libx264 @ 0x7fe66b800c00] 8x8 transform intra:42.7% inter:49.6%
[libx264 @ 0x7fe66b800c00] coded y,uvDC,uvAC intra: 61.4% 65.7% 32.2% inter: 9.7% 10.2% 2.1%
[libx264 @ 0x7fe66b800c00] i16 v,h,dc,p: 22% 27% 23% 28%
[libx264 @ 0x7fe66b800c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 19% 26% 4% 5% 7% 5% 6% 6%
[libx264 @ 0x7fe66b800c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 23% 19% 4% 6% 6% 6% 5% 5%
[libx264 @ 0x7fe66b800c00] i8c dc,h,v,p: 48% 23% 18% 11%
[libx264 @ 0x7fe66b800c00] Weighted P-Frames: Y:3.7% UV:2.4%
[libx264 @ 0x7fe66b800c00] ref P L0: 70.7% 13.5% 11.6% 4.2% 0.1%
[libx264 @ 0x7fe66b800c00] ref B L0: 91.2% 7.6% 1.2%
[libx264 @ 0x7fe66b800c00] ref B L1: 94.8% 5.2%
[libx264 @ 0x7fe66b800c00] kb/s:527.39
$ ffprobe -v quiet -select_streams a -show_entries stream=profile test.ts
[PROGRAM]
[STREAM]
profile=HE-AACv2
[/STREAM]
[/PROGRAM]
[STREAM]
profile=HE-AACv2
[/STREAM]
$ ffplay test.ts
ffplay version N-67514-g7656c4c Copyright (c) 2003-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mpegts, from 'test.ts': 0KB vq= 0KB sq= 0B f=0/0
Duration: 00:09:56.61, start: 1.400000, bitrate: 665 kb/s
Program 1
Metadata:
service_name : Big Buck Bunny
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 640x360, 24 fps, 24 tbr, 90k tbn, 48 tbc
Stream #0:1[0x101](eng): Audio: aac (HE-AACv2) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 64 kb/s
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing
Last message repeated 9 times
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
Last message repeated 1 times
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
Last message repeated 1 times
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
[aac @ 0x7fcfaa836800] ChannelElement 1.0 missing sq= 0B f=0/0
# [... etc ...]
comment:18 by , 10 years ago
Attached test.ts created with:
$ ffmpeg -i 03-ThreeJollyHuntsmen.wav -c:a libfdk_aac -profile:a aac_he -b:a 64k -ac 1 test.ts
ffmpeg version N-67514-g7656c4c Copyright (c) 2000-2014 the FFmpeg developers
built on Nov 10 2014 20:00:06 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
configuration: --enable-gpl --enable-version3 --enable-nonfree --disable-ffserver --enable-shared --enable-libfdk-aac --enable-libx265 --enable-libx264 --enable-libxvid --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab --extra-cflags=-I/sw/include --extra-libs=-L/sw/lib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 12.100 / 56. 12.100
libavformat 56. 12.103 / 56. 12.103
libavdevice 56. 2.100 / 56. 2.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from '03-ThreeJollyHuntsmen.wav':
Duration: 00:01:25.52, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Output #0, mpegts, to 'test.ts':
Metadata:
encoder : Lavf56.12.103
Stream #0:0: Audio: aac (libfdk_aac) (HE-AAC), 44100 Hz, mono, s16, 64 kb/s
Metadata:
encoder : Lavc56.12.100 libfdk_aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
size= 761kB time=00:01:25.52 bitrate= 72.9kbits/s
video:0kB audio:669kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 13.774409%
comment:20 by , 5 years ago
Replying to blacktrash:
Summary of the bug:
Channel count and channel layout for aac_he mono is always reported (decoded?) as stereo.
Same observed 26 May 2020.
FFmpeg, using libfdk_aac and "profile:a he_aac", believes it is encoding mono, but on inputting the encoded file, FFmpeg reports stereo and he_aac_v2.
ffmpeg -i .\h.mp3 -af dynaudnorm=g=5:r=1:m=20.0:b=1,alimiter=limit=-10dB -ac 1 -ar 32000 -profile:a aac_he -c:a libfdk_aac mono.aac
ffmpeg version N-97952-g2502e13b07-COMPILED_BY_JohnWarburton Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 10.1.1 (GCC) 20200522
configuration: --arch=x86_64 --target-os=mingw32 --cross-prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/bin/x86_64-w64-mingw32- --pkg-config=pkg-config --enable-libjack --disable-doc --enable-libxml2 --enable-opencl --enable-gpl --enable-libtesseract --enable-libx264 --enable-avisynth --enable-libxvid --enable-libmp3lame --enable-libmysofa --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --disable-w32threads --enable-libcodec2 --enable-frei0r --enable-filter=frei0r --enable-bzlib --enable-libxavs --enable-libxavs2 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libvpx --enable-libilbc --enable-libwavpack --enable-libwebp --enable-libgme --enable-libbs2b --enable-libmfx --enable-librubberband --enable-dxva2 --enable-d3d11va --enable-nvenc --enable-nonfree --enable-libfdk-aac --enable-libflite --enable-decoder=aac --enable-libaom --enable-runtime-cpudetect --enable-libpulse --enable-cuda-nvcc --prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/x86_64-w64-mingw32 --enable-shared --disable-static --disable-debug --disable-stripping --enable-libsoxr --enable-fontconfig --enable-libass --enable-libbluray --enable-iconv --enable-libtwolame --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpsapi --enable-opengl --extra-libs=-lz --extra-libs=-lpng --enable-libvidstab --enable-decklink --extra-libs=-loleaut32 --enable-libcdio --enable-libzimg --enable-chromaprint --enable-libsnappy --enable-libx265 --enable-lv2 --enable-libklvanc --logfile=/dev/tty --extra-cflags= --extra-version=COMPILED_BY_JohnWarburton --extra-cxxflags=-Wno-narrowing
libavutil 56. 49.100 / 56. 49.100
libavcodec 58. 87.101 / 58. 87.101
libavformat 58. 43.100 / 58. 43.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 83.100 / 7. 83.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mp3, from '.\h.mp3':
Duration: 00:00:44.93, start: 0.025057, bitrate: 103 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, mono, fltp, 103 kb/s
Metadata:
encoder : LAME3.99r
File 'mono.aac' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (mp3 (mp3float) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
Output #0, adts, to 'mono.aac':
Metadata:
encoder : Lavf58.43.100
Stream #0:0: Audio: aac (libfdk_aac) (HE-AAC), 32000 Hz, mono, s16, 34 kb/s
Metadata:
encoder : Lavc58.87.101 libfdk_aac
size= 192kB time=00:00:44.89 bitrate= 35.1kbits/s speed=26.3x
video:0kB audio:192kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
And mediainfo -f reports it's mono:
$ mediainfo -f mono.aac General Count : 308 Count of stream of this kind : 1 Kind of stream : General Kind of stream : General Stream identifier : 0 Count of audio streams : 1 Audio_Format_List : AAC Audio_Format_WithHint_List : AAC Audio codecs : AAC LC-SBR Complete name : mono.aac File name : mono File extension : aac Format : ADTS Format : ADTS Format/Info : Audio Data Transport Stream Format/Extensions usually used : aac Commercial name : ADTS Codec : ADTS Codec : ADTS Codec/Info : Audio Data Transport Stream Codec/Extensions usually used : aac File size : 196779 File size : 192 KiB File size : 192 KiB File size : 192 KiB File size : 192 KiB File size : 192.2 KiB Overall bit rate mode : VBR Overall bit rate mode : Variable Stream size : 0 Stream size : 0.00 Byte (0%) Stream size : Byte0 Stream size : 0.0 Byte Stream size : 0.00 Byte Stream size : 0.000 Byte Stream size : 0.00 Byte (0%) Proportion of this stream : 0.00000 File creation date : UTC 2020-05-26 15:01:25.297 File creation date (local) : 2020-05-26 16:01:25.297 File last modification date : UTC 2020-05-26 15:06:00.284 File last modification date (local) : 2020-05-26 16:06:00.284 Audio Count : 254 Count of stream of this kind : 1 Kind of stream : Audio Kind of stream : Audio Stream identifier : 0 Format : AAC Format/Info : Advanced Audio Codec Commercial name : AAC Format version : Version 4 Format profile : HE-AAC / LC Format settings, SBR : Yes (Implicit) Format settings, SBR : Yes (Implicit) Codec : AAC LC-SBR Codec : AAC LC-SBR Bit rate mode : VBR Bit rate mode : Variable Channel(s) : 1 Channel(s) : 1 channel Channel positions : Front: C Channel positions : 1/0/0 ChannelLayout : C Sampling rate : 32000 / 16000 Sampling rate : 32.0 KHz / 16.0 KHz Compression mode : Lossy Compression mode : Lossy Stream size : 196779 Stream size : 192 KiB (100%) Stream size : 192 KiB Stream size : 192 KiB Stream size : 192 KiB Stream size : 192.2 KiB Stream size : 192 KiB (100%) Proportion of this stream : 1.00000
But ffmpeg and ffprobe report the file is stereo:
ffprobe .\mono.aac
ffprobe version N-97952-g2502e13b07-COMPILED_BY_JohnWarburton Copyright (c) 2007-2020 the FFmpeg developers
built with gcc 10.1.1 (GCC) 20200522
configuration: --arch=x86_64 --target-os=mingw32 --cross-prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/bin/x86_64-w64-mingw32- --pkg-config=pkg-config --enable-libjack --disable-doc --enable-libxml2 --enable-opencl --enable-gpl --enable-libtesseract --enable-libx264 --enable-avisynth --enable-libxvid --enable-libmp3lame --enable-libmysofa --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --disable-w32threads --enable-libcodec2 --enable-frei0r --enable-filter=frei0r --enable-bzlib --enable-libxavs --enable-libxavs2 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libvpx --enable-libilbc --enable-libwavpack --enable-libwebp --enable-libgme --enable-libbs2b --enable-libmfx --enable-librubberband --enable-dxva2 --enable-d3d11va --enable-nvenc --enable-nonfree --enable-libfdk-aac --enable-libflite --enable-decoder=aac --enable-libaom --enable-runtime-cpudetect --enable-libpulse --enable-cuda-nvcc --prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/x86_64-w64-mingw32 --enable-shared --disable-static --disable-debug --disable-stripping --enable-libsoxr --enable-fontconfig --enable-libass --enable-libbluray --enable-iconv --enable-libtwolame --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpsapi --enable-opengl --extra-libs=-lz --extra-libs=-lpng --enable-libvidstab --enable-decklink --extra-libs=-loleaut32 --enable-libcdio --enable-libzimg --enable-chromaprint --enable-libsnappy --enable-libx265 --enable-lv2 --enable-libklvanc --logfile=/dev/tty --extra-cflags= --extra-version=COMPILED_BY_JohnWarburton --extra-cxxflags=-Wno-narrowing
libavutil 56. 49.100 / 56. 49.100
libavcodec 58. 87.101 / 58. 87.101
libavformat 58. 43.100 / 58. 43.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 83.100 / 7. 83.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[aac @ 0000024422d46a00] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from '.\mono.aac':
Duration: 00:00:38.05, bitrate: 41 kb/s
Stream #0:0: Audio: aac (HE-AACv2), 32000 Hz, stereo, fltp, 41 kb/s
And FFmpeg's stream analysis reports stereo, and HE-AACv2:
ffprobe -show_streams mono.aac
ffprobe version N-97952-g2502e13b07-COMPILED_BY_JohnWarburton Copyright (c) 2007-2020 the FFmpeg developers
built with gcc 10.1.1 (GCC) 20200522
configuration: --arch=x86_64 --target-os=mingw32 --cross-prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/bin/x86_64-w64-mingw32- --pkg-config=pkg-config --enable-libjack --disable-doc --enable-libxml2 --enable-opencl --enable-gpl --enable-libtesseract --enable-libx264 --enable-avisynth --enable-libxvid --enable-libmp3lame --enable-libmysofa --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --disable-w32threads --enable-libcodec2 --enable-frei0r --enable-filter=frei0r --enable-bzlib --enable-libxavs --enable-libxavs2 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libvpx --enable-libilbc --enable-libwavpack --enable-libwebp --enable-libgme --enable-libbs2b --enable-libmfx --enable-librubberband --enable-dxva2 --enable-d3d11va --enable-nvenc --enable-nonfree --enable-libfdk-aac --enable-libflite --enable-decoder=aac --enable-libaom --enable-runtime-cpudetect --enable-libpulse --enable-cuda-nvcc --prefix=/home/john/MultimediaTools-mingw-w64/sandbox/x86_64-w64-mingw32/x86_64-w64-mingw32 --enable-shared --disable-static --disable-debug --disable-stripping --enable-libsoxr --enable-fontconfig --enable-libass --enable-libbluray --enable-iconv --enable-libtwolame --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpsapi --enable-opengl --extra-libs=-lz --extra-libs=-lpng --enable-libvidstab --enable-decklink --extra-libs=-loleaut32 --enable-libcdio --enable-libzimg --enable-chromaprint --enable-libsnappy --enable-libx265 --enable-lv2 --enable-libklvanc --logfile=/dev/tty --extra-cflags= --extra-version=COMPILED_BY_JohnWarburton --extra-cxxflags=-Wno-narrowing
libavutil 56. 49.100 / 56. 49.100
libavcodec 58. 87.101 / 58. 87.101
libavformat 58. 43.100 / 58. 43.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 83.100 / 7. 83.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[aac @ 0000021fda366b00] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'mono.aac':
Duration: 00:00:38.05, bitrate: 41 kb/s
Stream #0:0: Audio: aac (HE-AACv2), 32000 Hz, stereo, fltp, 41 kb/s
[STREAM]
index=0
codec_name=aac
codec_long_name=AAC (Advanced Audio Coding)
profile=HE-AACv2
codec_type=audio
codec_time_base=1/32000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
sample_rate=32000
channels=2
channel_layout=stereo
bits_per_sample=0
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/28224000
start_pts=N/A
start_time=N/A
duration_ts=1073864023
duration=38.047903
bit_rate=41375
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
[/STREAM]
comment:21 by , 4 years ago
I am observing this bug as well attempting to downmix mono he-aac. using aac-lc instead of he-aac reports audio channel count correctly
comment:22 by , 3 years ago
It seems to be related to this piece of code:
else if (ac->oc[1].m4ac.ps == -1 && ac->oc[1].status < OC_LOCKED && ac->avctx->channels == 1) {
ac->oc[1].m4ac.sbr = 1;
ac->oc[1].m4ac.ps = 1;
ac->avctx->profile = FF_PROFILE_AAC_HE_V2;
output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
ac->oc[1].status, 1);
}
Version 0, edited 3 years ago by (next)
follow-up: 24 comment:23 by , 2 years ago
| Status: | new → open |
|---|
comment:24 by , 2 years ago
| Resolution: | → invalid |
|---|---|
| Status: | open → closed |
Replying to Balling:
Will be fixed by https://patchwork.ffmpeg.org/project/ffmpeg/patch/20220713175948.1955-1-jamrial@gmail.com/
The patch is withdrawn as Alex Converse informed us that this behavior (treating unsignaled mono as stereo) is intentionally defined for a HE-AACv2 complaint decoder by the MPEG audio committee. The libfdk-aac decoder does the same thing. So I'm closing this as invalid.
comment:25 by , 2 years ago
I suppose if the stereo can happen 100 samples in, then indeed it is more safe to output all as stereo and then compare md5 (./ffmpeg -c:a libfdk_aac -i ../samples/aac/al_sbr_ps_04_new.mp4 -af
channelmap=channel_layout=mono:map=0 -f md5 -
vs
./ffmpeg -c:a libfdk_aac -i ../samples/aac/al_sbr_ps_04_new.mp4 -af
channelmap=channel_layout=mono:map=1 -f md5 -
But:
A) fixed decoder should be fixed then to output stereo as well
B) it would be nice to add a warning that you treat mono as stereo, like TrueHD does (until Paul broke mono)
comment:26 by , 2 years ago
A) is done in https://patchwork.ffmpeg.org/project/ffmpeg/patch/20220730140821.3518-2-jamrial@gmail.com/
And it was applied, very good.
B) is done in 6406d5e430953085a0100b44dd8fceb478b383e2
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