Merge Multiple Inputs in One With PHP-FFmpeg

Question

I want to merge multiple videos side by side in one video with PHP-FFmpeg, is there anyone help me about that?

public function GENERATE_VIDEO()
{
    require_once APPPATH . '/third_party/vendor/autoload.php';
    $ffmpeg = FFMpeg\FFMpeg::create([
        'ffmpeg.binaries'  => APPPATH . '/third_party/ffmpeg',
        'ffprobe.binaries'  => APPPATH . '/third_party/ffprobe',
    ]);;
    $inputs = array(
        '../output/01.webm',
        '../output/02.webm',
    );
    $advancedMedia = $ffmpeg->openAdvanced($inputs);
    $ffmpeg->getFFMpegDriver()->listen(new \Alchemy\BinaryDriver\Listeners\DebugListener());
    $ffmpeg->getFFMpegDriver()->on('debug', function ($message) {
        echo $message . "\n";
    });
    $advancedMedia = $ffmpeg->openAdvanced($inputs);
    $advancedMedia->filters()
        ->custom('[0]', 'overlay=:x=000:y=000', '[output0]')
        ->custom('[output0][1]', 'overlay=:x=058:y=000', '[output1]');
    $advancedMedia
        ->map(array('[output1]'), new FFMpeg\Format\Video\WebM(), '../output/output.webm')
        ->save();
}

Above code is working actually, but there is something wrong with custom filters, it's saving only one input.

Use hstack instead. See [Vertically or horizontally stack (mosaic) several videos using ffmpeg?](https://stackoverflow.com/a/33764934/) — llogan, Dec 07 '20 at 01:33
@llogan I need the PHP-FFmpeg one, above code, I wrote a custom filter but when I run the code it's outputting 2th input. — Prokfantasmist, Dec 07 '20 at 04:29
What's the actual problem here? It is not clear. You wrote a custom ffmpeg filter? Can't really help much with that. — llogan, Dec 07 '20 at 16:03
@llogan problem is that when I start merging video its progressing only second video. — Prokfantasmist, Dec 07 '20 at 16:13
So in the output, instead of seeing both videos you only see 1? — llogan, Dec 07 '20 at 17:00

score 1 · Accepted Answer · answered Dec 08 '20 at 18:13

1

Use hstack filter instead of overlay filter if you want side-by-side.

Change:

    ->custom('[0]', 'overlay=:x=000:y=000', '[output0]')
    ->custom('[output0][1]', 'overlay=:x=058:y=000', '[output1]');

To:

    ->custom('[0][1]', 'hstack', '[output1]');

Both inputs must be the same height. If heights are different then add the scale, scale2ref, crop, or pad filters.
If you wanted to use overlay instead you need to pad the first video with the pad filter to provide space for the second video. But this method is slower and more complicated than just using hstack.

answered Dec 08 '20 at 18:13

llogan

121,796
28
232
243

Thanks for your answer, but that's not what I need, I want to use X-Y however, I cant use hstack there will be more video than two. – Prokfantasmist Dec 08 '20 at 18:59
1

@Prokfantasmist As the linked documentation states, hstack can accept multiple inputs. Such as `[0][1][2][3][4][5]hstack=inputs=6`. – llogan Dec 08 '20 at 19:01
I've edited the code i have, but still not working $advancedMedia->filters()->custom('[0][1][2][3]', 'hstack=inputs=4', '[V]'); – Prokfantasmist Dec 08 '20 at 19:07
@Prokfantasmist 1) Error messages are always better than just saying it's "not working". I can try to provide a bunch of guesses, but it's easiest if I know what the actual problem is. 2) Because you're basically just using the ffmpeg cli tool, and this is essentially just a ffmpeg cli quesiton, get it working in command-line first. Once you know the command works only then should you attempt to script it. Right now the PHP is just noise that is in the way. – llogan Dec 08 '20 at 19:10
How can I add scale for multiple inputs? – Prokfantasmist Dec 08 '20 at 22:48
1

@Prokfantasmist `ffmpeg -i input0.mp4 -i input1.mp4 -filter_complex "[0:v]scale=-1:720[left];[1:v]scale=-1:720[right];[left][right]hstack" output.mp4` – llogan Dec 08 '20 at 22:51
One more question; I need to merge output.m4 two or more times merge as vertically. – Prokfantasmist Dec 10 '20 at 14:30
1

@Prokfantasmist See the [vstack](https://ffmpeg.org/ffmpeg-filters.html#vstack) filter and [Vertically or horizontally stack (mosaic) several videos using ffmpeg?](https://stackoverflow.com/a/33764934/) for more examples. – llogan Dec 10 '20 at 17:26

Merge Multiple Inputs in One With PHP-FFmpeg

1 Answers1