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  • Run "scrcpy" Commands And Throws Error "libopenh264.so.7 is missing" / "openh264 disabled"

    7 mai 2024, par 息子運命

    I try to run scrcpy command like what I did before, and proved if it's worked not just once.

    


    scrcpy -m 540 -S


    


    but after re-installing my OS and use Fedora OS with dnf package manager, I got errors with output below.

    


    WARN: Demuxer 'audio': stream explicitly disabled by the device
WARN: [FFmpeg] libopenh264.so.7: cannot open shared object file: No such file or directory: libopenh264.so.7 is missing, openh264 support will be disabled
ERROR: Demuxer 'video': could not open codec
ERROR: Demuxer error
[server] INFO: Device screen turned off


    


    Seems I got a problem here because [FFmpeg] libopenh264.so.7 is missing and it cause openh264 support disabled.

    


  • Combine N number of videos in React Native using ffmpeg-kit-react-native

    20 novembre 2023, par Madhav

    I'm trying to concatenate N videos in one video.
I already tried many libraries, but without any success. The libraries I tried are :

    


    react-native-video-processor

    


    react-native-video-merger

    


    react-native-video-manager

    


    ffmpeg-kit-react-native

    


    None of them are working in the way I need, and can't find any specific commands to merge videos without the need of audio.

    


    I also tried these commands :

    


    `-i ${videoPaths.join(' -i ')} -filter_complex concat=n=${videoPaths.length}:v=1:a=0 [v] -map [v] -vf "scale=w=720:h=trunc(ow/a/2)*2,setsar=1:1" -c:v libx264 -c:a none -shortest -y ${outputVideoPath}`;

`-i ${videoPaths.join(' -i ')} -filter_complex concat=n=${videoPaths.length}:v=1:a=0 -strict -2 ${outputVideoPath}`;


    


    But nothing is working in the way I need.

    


  • Online RTMP radio with Python + FFmpeg + Nginx : unable to have a continuous output stream

    2 décembre 2023, par Igor Longo

    Thinking about an application similar to an online radio, I'm trying to transmit a sequence of audio files chosen by the user, where he chooses which file will be played in the sequence, sufficiently in advance for the reproduction not to be muted. I'm using FFmpeg in a Python script and an RTMP server running Nginx.
The problem is that interrupting the transmission between one file and another appears to be breaking the transmission on output. Sometimes files are skipped and other times it simply crashes for the client.

    


    I have already tried transmitting the sequence of files in real time, using '-re', and I have also tried not using '-re', creating a custom queue manager in Python with the intention of trying to keep only 'n' files in the server buffer .
Below is an excerpt of the code :

    


    ffmpeg_command = [
'ffmpeg',
'-loglevel', 'warning',
# '-re', # read input at native frame rate
'-i', file_path,
'-c:a', 'aac',
'-ar', '44100',
'-bufsize', '1024k',
'-af', 'atempo=1.0',
'-b:a', '128k',
'-f', 'flv',
'-flvflags', 'no_duration_filesize',
rtmp_url # server url
]
subprocess.run(ffmpeg_command, check=True)

    


    Any tips on how I can resolve this ?

    


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