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Sur d’autres sites (13116)

  • How to make 3D blocks video with ffmpeg

    26 juin 2018, par Adam Estel

    I know how to use tile and stereo3d or overlay filters to make 2d blocks (mosaic) video but i can’t figure out a way to slice video into multi parts and arrange it into 3d blocks just like just like in the image enter image description here

    How can i do this ? Is it possible with ffmpeg ?

  • Trying to limit output of ffmpeg

    14 mars 2017, par Thomas

    I have the following command line :

    ffmpeg -hide_banner -ss 5 -i test.mp4 -y -vf
    "select=’eq(pict_type\,PICT_TYPE_I)’,
    mpdecimate,showinfo,scale=320:240,tile=12x25" -vsync 2 out%%03d.png

    As you can see, I make a mosaic of 12x25 (=300) tiles per output image. But I’d like to cap the output to a single image.

    Is there a way to have ffmpeg stop processing the video after it found 300 frames ?

    Additionally, when grabbin the I-frames, is there a way to just keep 1/x for example

    After playing with different options, I couldn’t find any way to do this.

  • FFMPEG xstack not recognizing inputs

    12 août 2020, par Josh

    I'm trying to arrange three input videos into a single output video using ffmpeg's xstack. I currently have the operations working with a vstack followed by an hstack, but would like to combine them into an xstack for performance.

    


    I've tried copying the syntax from multiple locations such as :

    


    https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos%20using%20xstack

    


    Vertically or horizontally stack (mosaic) several videos using ffmpeg ?

    


    My command is as follows :

    


    


    C :\ffmpeg\bin\ffmpeg.exe -i states_full.mp4 -i title.mp4 -i graphs.mp4" -filter_complex "[0:v] setpts=PTS-STARTPTS, scale=qvga [a0] ; [1:v] setpts=PTS-STARTPTS, scale=qvga [a1] ; [2:v] setpts=PTS-STARTPTS, scale=qvga [a2] ; [a0][a1][a2]xstack=inputs=3:layout=0_0|w0_0|w0_h0[out] " -map "[out]" -c:v libx264 -t '30' -f matroska output.mp4

    


    


    The command always errors out at the same spot, with the same error message :

    


    


    'w0_0' is not recognized as an internal or external command,
operable program or batch file.

    


    


    Some odd behavior is that even when I change the layout section to :

    


    layout=w0_0|0_0|w0_h0


    


    The error message is still on the middle '0_0' meaning it may be an error in formatting.

    


    This issue is very strange, as the vstack and hstack still work, only the xstack fails.

    


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