Opened 10 years ago
Closed 10 years ago
#3542 closed defect (fixed)
Changing channel layout from downmix to stereo fails
| Reported by: | Carl Eugen Hoyos | Owned by: | |
|---|---|---|---|
| Priority: | important | Component: | swresample |
| Version: | git-master | Keywords: | regression |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description (last modified by )
This is closely related to ticket #2859.
Switching the channel layout from downmix to stereo using swresample fails since c56d4dab
$ ffmpeg -f s24le -ac 2 -i /dev/zero -t 1 -channel_layout DL+DR -acodec copy out.wav
$ ffmpeg -i out.wav -channel_layout stereo out2.wav
ffmpeg version N-62299-g60ef0c6 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 9 2014 15:01:30 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 52. 75.100 / 52. 75.100
libavcodec 55. 58.103 / 55. 58.103
libavformat 55. 36.102 / 55. 36.102
libavdevice 55. 11.100 / 55. 11.100
libavfilter 4. 3.100 / 4. 3.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, wav, from 'out.wav':
Metadata:
encoder : Lavf55.36.102
Duration: 00:00:01.02, bitrate: 2117 kb/s
Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, downmix, s32, 2116 kb/s
[auto-inserted resampler 0 @ 0x24704c0] [SWR @ 0x24440c0] Input channel layout 'downmix' is not supported
[auto-inserted resampler 0 @ 0x24704c0] Failed to configure output pad on auto-inserted resampler 0
Error opening filters!
Work-around is to force the input channel layout:
$ ffmpeg -channel_layout stereo -i out.wav out2.wav
Generally, this is an issue when extracting a downmix stream from a mov file to 24bit wav: The resulting wav file will not play in QT since QT doesn't like the wav channel layout "downmix".
Change History (4)
comment:1 by , 10 years ago
| Description: | modified (diff) |
|---|
comment:2 by , 10 years ago
comment:3 by , 10 years ago
I am having the same issues with this line, looking for a workarround:
ffmpeg -guess_layout_max 0 -i 5.1_Stereo_test.mov -map 0:1 -acodec pcm_s24le -y test_01_Mono.wav -map 0:2 -acodec pcm_s24le -y test_02_Mono.wav -map 0:3 -acodec pcm_s24le -y test_03_Mono.wav -map 0:4 -acodec pcm_s24le -y test_04_Mono.wav -map 0:5 -acodec pcm_s24le -y test_05_Mono.wav -map 0:6 -acodec pcm_s24le -y test_06_Mono.wav -channel_layout stereo -map 0:7 -acodec pcm_s24le test_07_Stereo.wav
$ ffmpeg -guess_layout_max 0 -i 5.1_Stereo_test.mov -map 0:1 -acodec pcm_s24le -y test_01_Mono.wav -map 0:2 -acodec pcm_s24le -y test_02_Mono.wav -map 0:3 -acodec pcm_s24le -y test_03_Mono.wav -map 0:4 -acodec pcm_s24le -y test_04_Mono.wav -map 0:5 -acodec pcm_s24le -y test_05_Mono.wav -map 0:6 -acodec pcm_s24le -y test_06_Mono.wav -channel_layout stereo -map 0:7 -acodec pcm_s24le test_07_Stereo.wav
ffmpeg version 2.1.4 Copyright (c) 2000-2014 the FFmpeg developers
built on Mar 22 2014 06:02:12 with Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-fontconfig --enable-libfreetype --disable-indev=jack --disable-outdev=xv --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --enable-vda --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
libavutil 52. 48.101 / 52. 48.101
libavcodec 55. 39.101 / 55. 39.101
libavformat 55. 19.104 / 55. 19.104
libavdevice 55. 5.100 / 55. 5.100
libavfilter 3. 90.100 / 3. 90.100
libavresample 1. 1. 0 / 1. 1. 0
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '5.1_Stereo_test.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2014-03-06 11:25:34
Duration: 00:01:03.48, start: 0.000000, bitrate: 153967 kb/s
Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 144704 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32, 2304 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2014-03-06 11:26:04
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
[auto-inserted resampler 0 @ 0x7f85e2e1ad40] [SWR @ 0x7f85e411bc00] Input channel layout 'downmix' is not supported
[auto-inserted resampler 0 @ 0x7f85e2e1ad40] Failed to configure output pad on auto-inserted resampler 0
comment:4 by , 10 years ago
| Reproduced by developer: | set |
|---|---|
| Resolution: | → fixed |
| Status: | new → closed |
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Since I am not so sure if it is valid at all to write "downmix" to a wav file, here is a more realistic alternative:
$ ffmpeg -i out.mov -channel_layout stereo -acodec pcm_s16be out2.mov ffmpeg version N-62299-g60ef0c6 Copyright (c) 2000-2014 the FFmpeg developers built on Apr 9 2014 15:01:30 with gcc 4.7 (SUSE Linux) configuration: --enable-gpl libavutil 52. 75.100 / 52. 75.100 libavcodec 55. 58.103 / 55. 58.103 libavformat 55. 36.102 / 55. 36.102 libavdevice 55. 11.100 / 55. 11.100 libavfilter 4. 3.100 / 4. 3.100 libswscale 2. 6.100 / 2. 6.100 libswresample 0. 18.100 / 0. 18.100 libpostproc 52. 3.100 / 52. 3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf55.19.104 Duration: 00:00:01.00, start: 0.000000, bitrate: 1416 kb/s Stream #0:0(eng): Audio: pcm_s16be (twos / 0x736F7774), 44100 Hz, downmix, s16, 1411 kb/s (default) Metadata: handler_name : DataHandler [auto-inserted resampler 0 @ 0x2c99160] [SWR @ 0x2c99580] Input channel layout 'downmix' is not supported [auto-inserted resampler 0 @ 0x2c99160] Failed to configure output pad on auto-inserted resampler 0 Error opening filters!