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• Change video resolution in loop

  24 juillet 2020, par WoJo

  I am trying to decrease the resolution of a video to under 500x500. I don't want to change it to exactly 500x500 because that would mess up video quality. So what I am trying to do is to decrease the resolution by 75% in a loop, and that loop would only stop when the video is under 500x500. In theory that would not be hard, but I can't seem to figure it out.

  


  var vidwidth = 501; //Create variable and put it to 501
var vidheight = 501; //so that it won't go through the If Statement
fs.copyFile(filepath2, './media/media.mp4', (err: any) => { //Copy given file to directory
    console.log('filepath2 was copied to media.mp4'); //Log confirmation (Not appearing for some reason, but file is copied)
})
while (true) {
    getDimensions('./media/media.mp4').then(function (dimensions: any) { //Get dimensions of copied video
        var vidwidth = parseInt(dimensions.width)   //Parse to Int
        var vidheight = parseInt(dimensions.height) //and put in variables
    })
    ffmpeg('./media/media.mp4')                 //Call ffmpeg function with copied video path
        .output('./media/media.mp4')            //Set output to the same file so we can loop it
        .size('75%')                            //Reduce resolution by 75%
        .on('end', function() {                 //Log confirmation on end
            console.log('Finished processing'); //(Not appearing)
        })                                      //
        .run();                                 //Run function
    if (vidwidth < 500 && vidheight < 500) {    //Check if both the width and height is under 500px
        break;                                  //If true, break the loop and continue
    }
}


  


  This is the current code I am using with comments. Basically what happens is it gets stuck in the while loop because the dimensions of the video won't change. Tested with console.log() line. I think that if I can fix the ffmpeg problem somehow it will all be fixed.
I'd appreciate any help :)

  


  PS : This is all made in typescript, then build into js using npx tsc

  


• Android editing video files

  25 novembre 2013, par Kernald

  I'm working on an Android application in which the user should be able to edit a video (cut and reorder some parts of a video taken with the phone).

  I have no idea how to do this : the media package doesn't seems to contain anything related to this. The videoeditor package could probably help me, but it's not public in the SDK. ffmpeg could maybe be a solution, but I'd like to avoid using NDK if I can.

  Any directions on how to do it ?

• Android libraries for ffmpeg + stagefright. languge c++

  31 juillet 2014, par Serhii Skytyba

  I’v making cross-platform program in c++. In my program for Android platform i need video decoding hw acceleration. I have found out, that i need to look in libstagefright.cpp. which contains ffmpeg library. There i have found next includes :

  #include <binder></binder>ProcessState.h>
  
  #include <media></media>stagefright/MetaData.h>
  
  #include <media></media>stagefright/MediaBufferGroup.h>
  
  #include <media></media>stagefright/MediaDebug.h>
  
  #include <media></media>stagefright/MediaDefs.h>
  
  #include <media></media>stagefright/OMXClient.h>
  
  #include <media></media>stagefright/OMXCodec.h>
  
  #include <utils></utils>List.h>

  Also, i found out that the source code of these headers is here : https://android.googlesource.com . But i can’t understand in which way to build them. So, my question is : Where can i get these libraries or how can get the source code, that i need to build ? Also, i look for advice which way i can better use Android video decoding hw acceleration + ffmpeg.