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  • using ffmpeg to rotate a RTSP stream and then restram that back to my local network ( usign windows )

    29 décembre 2022, par sesipod

    I would like to use FFMPEG to consume a stream from my cctv ip camera,rotate the video feed 90 and then re-streamt that back to my local network over rtsp. I would like to make this work on Windows only, and using the igpu in my machine to help with the cpu load. My camera does not support 90 degree rotation native so the use of FFMPEG would be nice help.

    


    Here is what I have tried so far but it will not give me anything that I can watch on VLC for example.

    


    ffmpeg -i rtsp://admin:passwordhere@192.168.1.147:554/h264Preview_01_main -vf "transpose=2" -c:v libx264 -b:v 1000k -s 640x480 -f rtsp


    


    rtsp://localhost:8888/live.sdp


    


  • decode : copy the output parameters from the last bsf in the chain back to the AVCodec...

    27 juillet 2018, par James Almer
    decode : copy the output parameters from the last bsf in the chain back to the AVCodecContext

    Signed-off-by : James Almer <jamrial@gmail.com>
    • [DBH] libavcodec/decode.c

  • Generate frame images from video and compile them back to the video in-memory

    24 septembre 2020, par gumkins

    I have to remove some repeating frames from the beginning of a video file.

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    For that I'm generating frame images from the video

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    ffmpeg -i input.mp4 -qscale:v 2 frame_%04d.jpg

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    This command generates a set of files with index in name. Then I'm analyzing frames against some criteria programmaticaly, removing useless ones and compiling the rest back to the video file

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    ffmpeg -r 60 -start_number 0 -i "frame_%04d.jpg" -c:v libx264 -vf "fps=25,format=yuv420p" out.mp4

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    What I don't like in this schema that IO operations take part in the process. I would like to generate an array of buffers with binary data, then process it with Javascript and then pipe filtered ones back to ffmpeg without using the file system.

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    Does ffmpeg have such possibility ?

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