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  • ffmpeg :How to stop recording when stream shows no signal message

    30 mars 2017, par A Sahra

    I am recording video from a rtsp live stream using ffmpeg and during this process sometimes the camera goes with no signal message at this time i want to stop recording of stream,i have tried it with bitrate that it checks for bitrates every minutes and if bitrate is less than some value eg(bitrate=150) then the condition in my shell script stops the process of recording if not it continues the process,but this i couldn’t get consistent result because of variation in value of bitrates.

    My question : How to stop this process(recording) when i get no signal message in my video ?

  • Android FFmpeg fbdev0

    17 juillet 2014, par nLL

    I have compiled FFmpeg and using to capture from fbdev with command

    adb shell /system/bin/ffmpeg -y -f fbdev -i /dev/graphics/fb0 -vcodec mpeg4 -b:v 4000000 -r 24 /sdcard/a.mp4

    On 2 test devices this works fine but on the 3rd one (Samsung s3 with Android 4.3) generated video is all mixed up. I can see from FFmpeg out put below that buffer from fbdev has only 50 height which is wrong. I have tried to resize it with FFmpeg without any luck

    Do you think it can be fixed by re processing it some how ? Or this is a bug with the firmware/rom ?

    [fbdev @ 0x1060d30] w:720 h:50 bpp:32 pixfmt:bgra fps:25/1 bit_rate:28800000
    
Input #0, fbdev, from '/dev/graphics/fb0':
    
Duration: N/A, start: 1405583288.995053, bitrate: 28800 kb/s
    
Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 720x50, 28800 kb/s,
    
25 tbr, 1000k tbn, 25 tbc

  • Configure script for ffmpeg does not find sdl2

    3 avril 2018, par Peter

    Environment :

     Ubuntu 16.04
    
 ffmpeg source code version 3.4.2

    SDL2 installed

    $ pkg-config --exists --print-errors sdl2
    
$ sdl2-config --cflags
    
-I/usr/include/SDL2 -D_REENTRANT
    
$ sdl2-config --libs
    
-L/usr/lib/x86_64-linux-gnu -lSDL2
    
$ sdl2-config --version
    
2.0.4

    Here is part of my configuration shell script :

    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$TARGET_DIR/lib/pkgconfig" ./configure \
    
--prefix="$TARGET_DIR" \
    
--pkg-config-flags="--static" \
    
--enable-sdl2 \

    When I run the script, the error I get is "sdl2 requested but not found."

    What is it that I am missing ? Regards.

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