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    MediaSPIP automatically converts uploaded files to internet-compatible formats.
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  • ffmpeg video splitting less then 10 sec gives black clip - ubuntu 18.04 LTS

    9 juillet 2020, par vipin

    I am using FFmpeg version 4.3-2 18.04.york0 on AWS EC2 server for video splitting, while I split video less then 11 seconds the output.mp4 gives a blank video. I have tried the same thing with my local MAC and Ubuntu 19 but it works fine.

    


    ffmpeg -i input.mp4 -ss 00:01:10 -to 00:01:15 -c:v copy -c:a copy output.mp4


    


  • Resize image by adding extra black pixels at borders

    25 juin 2020, par Sudheer Kumar

    I would like to resize an image(lower resolution to higher resolution) by adding black pixels at the borders. I have raw image data available in YUV420/RGB format. I want to add back pixels to this raw image data and change its resolution to desired state. Example before to after. I have all my code in CPP, and i am also using ffmpeg libraries to scale/convert data format.

    


  • Use ffmpeg to generate a video of black/blank frames [duplicate]

    2 novembre 2016, par Bird

    This question already has an answer here :

    I want to generate a 3 second video of just black frames using ffmpeg on Windows 7. Based on the answer to this question, it seems possible.

    Running the command :

     ffmpeg -t 3 -s 640x480 -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero empty.mpeg

    returns the error :

    /dev/zero: No such file or directory  

    and no file is generated.

    I also tried changing /dev/zero to NUL as suggested here, but the result is a size 0 KB file that does not play.

    Anyone know how to generate a black video using ffmpeg on Windows ?

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