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• How to downsample all '.MTS' videos in a folder via using FFmpeg/or python ?

  24 mai 2020, par kkkrr000

  I have a list of videos('.MTS') formatt.How can I downsample it (keeping the aspect ratio same).I want to downsample all of them to a particular size.

  



   f"ffmpeg -i {vname} -filter:v scale={width}:{height} -c:


  



  I came across this piece of code. Should I do this via terminal or via a python interpreter ?
Can has experience with this ?

  


• configuring android to run ffmpeg command programmatically

  16 juillet 2013, par Abdul Mateen

  I am unaware with ffmpeg, and wants to run ffmpeg command on android terminal.
  What are the basic steps to configure android so that it can run ffmpeg command through android application program ?

  Thanking you !...

• How to get the buffer of the first frame of a video using ffmpeg ? (Node.js)

  12 avril 2024, par Mahmoud Walid

  I am trying to use child_processes and ffmpeg to do this, but it returns this error :

  


  FFmpeg stderr: [AVFilterGraph @ 00000157fd55abc0] No option name near 'eq(n, 0)"'
[AVFilterGraph @ 00000157fd55abc0] Error parsing a filter description around:
[AVFilterGraph @ 00000157fd55abc0] Error parsing filterchain '"select=eq(n\, 0)"' around:
[vost#0:0/libx264 @ 00000157fd574700] Error initializing a simple filtergraph
Error opening output file pipe:1.
Error opening output files: Invalid argument

FFmpeg process exited with code: 4294967274


  


  When I run that command in the terminal, it works fine, but it doesn't work in the code.
Here's the command (terminal version) :
ffmpeg -i input/vid.mp4 -vf "select=eq(n\,0)" -vframes 1 out.png

  


  And heres the code :

  


  import { spawn } from 'child_process';

const inputVideoPath = 'input/vid.mp4';

const ffmpeg = spawn('ffmpeg', [
    '-i', inputVideoPath,
    '-vf', '"select=eq(n\\, 0)"',
    '-vframes', '1',
    '-f', 'mp4',
    'pipe:1'
]);

let buffer = Buffer.from([]);
ffmpeg.stdout.on('data', (data) => {
    buffer = Buffer.concat([buffer, data]);
});

ffmpeg.stderr.on('data', (data) => {
    console.error('FFmpeg stderr:', data.toString());
});

ffmpeg.on('exit', (code) => {
    if (code == 0) {
        console.log('FFmpeg process exited successfully.');
        console.log(`Buffer size: ${buffer.length} bytes`);
    } else {
        console.error(`FFmpeg process exited with code: ${code}`);
    }
});

ffmpeg.on('error', (err) => {
    console.error('FFmpeg error:', err);
});


  


  Note : I know I'm not doing anything with the buffer, I just want it to work first then I'll start working with the output