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  • FFMPEG weight/compression compromise

    15 juillet 2022, par untrimattacks

    I'm look for the best way to reduce the weight of videos. Find a weight/compression compromise on different resolutions (from 480p to 1080p). But without degrading the audio/video quality too much.

    


    I've looked at different questions/answers and looking the FFMPEG documentation but I'm not sure about the best way to do this

    


    maybe

    


    


    ffmpeg5\ffmpeg.exe -i "file.mp4" -i watermark.png -filter_complex
"overlay=x=(main_w-overlay_w)*0.95:y=(main_h-overlay_h)*0.95"
-loglevel error -stats -hwaccel cuda -preset veryfast "fileEDIT.mp4"

    


    


    or

    


    


    ffmpeg5\ffmpeg.exe -loglevel error -stats -hwaccel cuda -i "file.mp4" -i watermark.png -filter_complex
"overlay=x=(main_w-overlay_w)*0.95:y=(main_h-overlay_h)*0.95" -vcodec
libx265 -crf 21 "fileEDIT.mp4"

    


    


    or

    


    


    ffmpeg5\ffmpeg.exe -loglevel error -stats -hwaccel cuda -i "file.mp4"
-i watermark.png -filter_complex "overlay=x=(main_w-overlay_w)*0.95:y=(main_h-overlay_h)*0.95" -vcodec
libx265 -crf 21 -maxrate 3200k -bufsize 4200k "fileEDIT.mp4"

    


    


    (i add an overlay and this overlay size is different depending on the resolution, it's smaller or bigger but that's another concern. I have to look but i have an idea how to do it with GetDetailsOf method, iColumn 314 )

    


    thanks

    


  • A light-weight Rust crate for encoding videos from images and audios [closed]

    24 décembre 2019, par Agus Putra Dana

    I want to make a web app that enable users to generate video from canvas animation. I’m aware that I can record the canvas animation and the audios using catureStream(), but I want to generate the video without playing the audio. Also, the video frame rate generated using this method is not consistent.

    My idea is to capture the canvas frame by frame and store them as blob to get a consistent frame rate. And then encode the video from these blobs and some audio files uploaded by the user using web assembly. I’m also aware that I can use FFMPEG to encode the video. But the file size of the compiled FFMPEG is quite big.

    Is there any light-weight video encoder library, preferably written in Rust, just for encoding video from images and audios ?

  • avcodec/hevc_ps : Change num_tile_rows/columns checks to sps->ctb_height/weight

    25 juin 2019, par Michael Niedermayer
    avcodec/hevc_ps : Change num_tile_rows/columns checks to sps->ctb_height/weight

    Suggested-by : James Almer <jamrial@gmail.com>
    
Reviewed-by : James Almer <jamrial@gmail.com
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/hevc_ps.c

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