[FFmpeg-trac] #7046(undetermined:new): Cannot select channel layout when loudnorm filter is used
FFmpeg
trac at avcodec.org
Tue Feb 27 14:33:17 EET 2018
#7046: Cannot select channel layout when loudnorm filter is used
-------------------------------------+-------------------------------------
Reporter: lkiesow | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Using a loudnorm and an aresample filter in a chain results in:
''Cannot select channel layout for the link between filters
Parsed_aresample_1 and format_out_0_1.
Error reinitializing filters!''
I would expect FFmpeg to use the input channel layout for output like it
usually does.
A simple example command to test this:
{{{
%ffmpeg -y -i test.mp4 -filter:a loudnorm,aresample=44100 -c:v copy -c:a
aac out.mp4 [1]
ffmpeg version N-45155-gb6652f510-static https://johnvansickle.com/ffmpeg/
Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --enable-gpl --enable-version3 --enable-static --disable-
debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
--cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-
gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-
libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex
--enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxvid --enable-libzimg
libavutil 56. 7.101 / 56. 7.101
libavcodec 58. 12.102 / 58. 12.102
libavformat 58. 9.100 / 58. 9.100
libavdevice 58. 2.100 / 58. 2.100
libavfilter 7. 12.100 / 7. 12.100
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'norm-test-enc.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Duration: 00:02:00.02, start: 0.000000, bitrate: 1217 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080, 1079 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_aresample_1 @ 0x5a86040] Cannot select channel layout for the link
between filters Parsed_aresample_1 and format_out_0_1.
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:1
Conversion failed!
}}}
The same command works if I set a fixed channel layout:
{{{
ffmpeg -i in.mp4 -filter:a loudnorm,aresample=44100 -c:v copy -c:a aac -ac
2 out.mp4
}}}
Setting no fixed channel layout but removing the loadnorm filter works
fine as well:
{{{
ffmpeg -i in.mp4 -filter:a aresample=44100 -c:v copy -c:a aac out.mp4
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7046>
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