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1,000,000
27 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Demon Seed
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Four of Us are Dying
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Corona Radiata
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Lights in the Sky
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Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Head Down
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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FFMPEG wrong duration when using amix filter
12 mars 2020, par LeonardI am trying to add background music to a video with an existing audio-track. I settled for the amix filter, since other filters seemed to cause a delayed audio track. So far everything is working as intended, however the output video is cut off at 11:34min. Which is 3 seconds shorter than the input video. I already tried to increase the length of the input video by e.g. 5 seconds, which still leads to the same output length of 11:34min. Here is the exact command I am using :
ffmpeg -i video.mp4 -i bg_music.wav -filter_complex "[0:a]volume=1.5[a0];[1:a]volume=0.2[a1];[a0][a1]amix=duration=shortest[a]" -map 0:v -map [a] -c:v copy -c:a aac -ar 22050 out.mp4
And this is the output I am getting. In this call the video has a length of 11:42min and the audio a length of 36:59min. I am running macOS Catalina 10.15.3 :
built with Apple clang version 11.0.0 (clang-1100.0.33.17)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:11:42.14, start: 0.000000, bitrate: 9182 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 9196 kb/s, 4.89 fps, 2.92 tbr, 15360 tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 100 kb/s (default)
Metadata:
handler_name : SoundHandler
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'bg_music.wav':
Metadata:
encoder : Adobe Audition 13.0 (Macintosh)
date : 2020-02-28
creation_time : 15:49:40
time_reference : 0
Duration: 00:36:58.57, bitrate: 2822 kb/s
Stream #1:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
Stream mapping:
Stream #0:1 (aac) -> volume
Stream #1:0 (pcm_f32le) -> volume
Stream #0:0 -> #0:0 (copy)
amix -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
Output #0, mp4, to 'out.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, q=2-31, 9196 kb/s, 4.89 fps, 2.92 tbr, 15360 tbn, 15360 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
encoder : Lavc58.54.100 aac
frame= 3392 fps=510 q=-1.0 Lsize= 789403kB time=00:11:33.46 bitrate=9325.3kbits/s speed= 104x
video:778257kB audio:11032kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.014279%
[aac @ 0x7fe32d00e800] Qavg: 333.046``` -
Revert "avformat/rtp : Pass sources and block filter addresses via sdp file for rtp"
5 avril 2020, par Carl Eugen HoyosRevert "avformat/rtp : Pass sources and block filter addresses via sdp file for rtp"
This reverts commit b71685865fe761925feedda3cd0b288224d9a509.
The commit lead to the use of an uninitialized variable.
Other issues were listed by Andreas Rheinhardt :
https://ffmpeg.org/pipermail/ffmpeg-devel/2020-March/259150.html