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  • SharedArrayBuffer for ffmpeg not working with React-Native

    31 août 2022, par Peter Garcia

    I am currently working on a React Native App using ffmpeg.wasm

    


    but for some reason, SharedArrayBuffer is still not working. My React version is "react" : "17.0.2", and React-dom is "17.0.2",. My Chrome version is Version 104.0.5112.101 (Official Build) (arm64)

    


    I've been racking my brain about why this isn't working on my React Native app since I did a test app and it works there but on this app, it doesn't.

    


    I am getting this error whenever I run ffmpeg.wasm :

    


    Uncaught (in promise) ReferenceError: SharedArrayBuffer is not defined
at aa35944d-451a-411f-bf18-4e42f7bbceb0:22:175
at Object.load (createFFmpeg.js:64:1)


    


    I cannot use Cross-Origin Opener headers :

    


    Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp


    


    because our app calls from a lot of outside APIs and it breaks them.

    


    Any help would be greatly appreciated.

    


  • How to fix this FFMPEG command to record audio as well ?

    19 mai 2018, par James Kowalski

    I am trying to fix this FFMPEG command to record audio.

    I have tried using the parts recommended on the official stackoverflow site but they didn’t work

    Orignal Command

    ffmpeg_stream = '/usr/bin/ffmpeg -f x11grab -s 1280x720 -r 24 -i :%d+nomouse -c:v libx264 -preset superfast -pix_fmt yuv420p -s 1280x720 -threads 0 -f flv "%s"' % (xvfb.new_display, info['destination'])

    Command with attempted audio

    ffmpeg_stream = '/usr/bin/ffmpeg -f x11grab -s 1280x720 -r 24 -i :%d+nomouse -c:v libx264 -preset superfast -pix_fmt yuv420p -s 1280x720 -threads 0 -f alsa -ac 2 -i hw:0 -f flv "%s"' % (xvfb.new_display, info['destination'])

  • How to build ffmpeg as a Position independent executable (PIE) or PIC on Android ?

    22 avril 2016, par Parth Doshi

    I have checked out the latest source of ffmpeg from the official website. I now want to compile and build ffmpeg as a position independent executable.

    Here is what my configure command looks like

    ./configure --prefix=/usr/local --enable-gpl --enable-pic --enable-nonfree --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265

    I have added the option --enable-pic to make it a PIE. However when the build process completes successfully and when I do a hardening check as follows then I get below output

    hardening-check ffmpeg

    ffmpeg:
    
Position Independent Executable: no, normal executable!
    
Stack protected: yes
    
Fortify Source functions: yes (some protected functions found)
    
Read-only relocations: yes
    
Immediate binding: no, not found!

    This tells me that ffmpeg is still not a PIE. Can anyone tell me what am I missing here ? Is there any other changes that need to be done for adding PIE support.

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