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• How to add a hard code of subs to this filter_complex

  15 juin 2021, par k-on fan

  ffmpeg -ss 00:11:47.970 -t 3.090 -i "file.mkv" -ss 00:11:46.470 -t 1.500 -i "file" -ss 00:11:51.060 -t 0.960 -i "file.mkv" -an -c:v libvpx -crf 31 -b:v 10000k -y -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0][2:v:0][2:a:0]concat=n=3:v=1:a=1[outv][outa];[outv]scale='min(960,iw)':-1[outv];[outv]subtitles='file.srt'[outv]" -map [outv] file_out.webm -map [outa] file.mp3


  


  I have a filter where take three different points in a file concat them together and scale them down this part works

  


  Im looking to see how to add to the filter_complex a sub burn in step rendering the subs from the exact timings usings a file that I specify when I use the above code it doesn't work

  


• When I run ffplay in Raspberry Pi 4 CLI mode, "* failed to add service - already in use ? (SDL restoring keyboard)" [closed]

  10 mai 2021, par SeungSeob Moon

  I tested using pi3b and pi4b.
It worked fine on pi3b.
However, if you plug the same sd card into the pi4b, ffplay cannot run.

  


  I tried as below.

  


  *) pwomxplayer.bin: error while loading shared libraries: \
   libEGL.so: cannot open shared object file: No such file or directory

```$ sudo apt-get install libegl1-mesa-dev```


*) Failed to create window or renderer: Could not initialize OpenGL / GLES library
```$ sudo apt-get install gir1.2-ibus-1.0 libdbus-1-dev libegl1-mesa-dev \
libibus-1.0-5 libibus-1.0-dev libice-dev libsm-dev libsndio-dev \
libwayland-bin libwayland-dev libxi-dev libxinerama-dev libxkbcommon-dev \
libxrandr-dev libxss-dev libxt-dev libxv-dev x11proto-randr-dev \
x11proto-scrnsaver-dev x11proto-video-dev x11proto-xinerama-dev ```


*) Failed to create window or renderer: Could not initialize EGL
```$ sudo apt install libghc-sdl2-dev libghc-sdl2-ttf-dev```


*) Compile SDL2 for KMSDRM
   https://github.com/midwan/amiberry/wiki/Compile-SDL2-for-KMSDRM


*) Failed to create window or renderer: Could not initialize EGL


  


      $ cd /opt/vc/lib
    $ sudo ln -s libbrcmEGL.so libEGL.so.1
    $ sudo ln -s libbrcmGLESv2.so libGLESv2.so.2
    $ export LD_LIBRARY_PATH=/opt/vc/lib


  


  ***) * failed to add service - already in use?
   (SDL restoring keyboard)** <== I am having a hard time here.


  


  How can I fix this error ?

  


  ** * failed to add service - already in use ?
(SDL restoring keyboard)**

  


• ffmpeg fails with "More than 1k frames duplicated" when merging with xfade

  1er mai 2021, par PadawanQ

  When I try to merge 8 or more video clips with the same codec (generated by ffmpeg in a previous step), I get a More than 1000 frames duplicated warning and the resulting output is not merged correctly. This doesn't happen with 7 video clips.

  


  I tried removing the 8th clip to check if there is a problem with that clip, but it happens the same. Also reordering the clips with no success.

  


  The command I use is :

  


  ffmpeg -i scenes/step-000.mp4 -i scenes/step-001.mp4 -i scenes/step-002.mp4 -i scenes/step-003.mp4 -i scenes/step-004.mp4 -i scenes/step-005.mp4 -i scenes/step-008.mp4 -i scenes/step-009.mp4 -filter_complex_script temp/2021-03-17-14-51-13-6.txt  -y -map "[video]" -map "[audio]" -pix_fmt yuv420p -movflags +faststart output.mp4


  


  The content of the filter_complex_script is :

  


  [0][1] xfade=transition=fade:duration=2:offset=2.48 [vtmp1]; [vtmp1][2] xfade=transition=fade:duration=2:offset=12.56 [vtmp2]; [vtmp2][3] xfade=transition=fade:duration=2:offset=100.58 [vtmp3]; [vtmp3][4] xfade=transition=fade:duration=2:offset=167.60 [vtmp4]; [vtmp4][5] xfade=transition=fade:duration=2:offset=222.62 [vtmp5]; [vtmp5][6] xfade=transition=fade:duration=2:offset=232.70 [vtmp6]; [vtmp6][7] xfade=transition=fade:duration=2:offset=282.72 [video]; [0:a][1:a] acrossfade=d=2:c1=tri:c2=tri [atmp1]; [atmp1][2:a] acrossfade=d=2:c1=tri:c2=tri [atmp2]; [atmp2][3:a] acrossfade=d=2:c1=tri:c2=tri [atmp3]; [atmp3][4:a] acrossfade=d=2:c1=tri:c2=tri [atmp4]; [atmp4][5:a] acrossfade=d=2:c1=tri:c2=tri [atmp5]; [atmp5][6:a] acrossfade=d=2:c1=tri:c2=tri [atmp6]; [atmp6][7:a] acrossfade=d=2:c1=tri:c2=tri [audio]


  


  FFMPEG version 4.3.2-tessus