Save MP4 video without audio - Ffmpeg-PHP

Question

I would like to know how I could save a clip(video) in MP4 by the Ffmpeg-PHP library without the audio, as it will not be necessary and I would also like to decrease the file size.

I’m using the following logic:

$frame = $segundos/6;
    for($i = 1 ; $i <= 5 ; $i++){
        $format = new \FFMpeg\Format\Video\X264();
        $format->setAudioCodec('libmp3lame');
        $clip = $video->clip(\FFMpeg\Coordinate\TimeCode::fromSeconds($frame*$i), \FFMpeg\Coordinate\TimeCode::fromSeconds(2.5));
        $clip->filters()->resize(new \FFMpeg\Coordinate\Dimension(320, 240), \FFMpeg\Filters\Video\ResizeFilter::RESIZEMODE_INSET, true);
        $clip->save($format,TEMPDIR.DS.'thumb.'.$filename.'_'.$i.'.mp4');
    }


$video->concat([TEMPDIR.DS.'thumb.'.$filename.'_1.mp4',
                TEMPDIR.DS.'thumb.'.$filename.'_2.mp4',
                TEMPDIR.DS.'thumb.'.$filename.'_3.mp4',
                TEMPDIR.DS.'thumb.'.$filename.'_4.mp4',
                TEMPDIR.DS.'thumb.'.$filename.'_5.mp4'])
      ->saveFromSameCodecs(TEMPDIR.DS.'thumb.'.$filename.'.mp4', TRUE);

But I have not seen anything in the documentation about saving without something audio, because to save the clip is required to set an Audiocodec if not encoding error.

Answer 1

You remove audio using the flag -an.

ffmpeg -i example.mkv -c copy -an example-nosound.mkv

Use the code below to remove audio with Simplefilter.

$customFilter = '-an';
\FFMpeg::fromDisk($disk)
->open($input)
->addFilter(new FFMpeg\Filters\Audio\SimpleFilter([$customFilter]))
->export()
->toDisk([$outputdisk])
->inFormat(new \FFMpeg\Format\Video\X264('libmp3lame', 'libx264'))
->save($output);

References

Proper use of setAdditionalParameters to remove audio?

Remove audio from video file with Ffmpeg

Note

Converting Audio into Different Formats / Sample Rates

Documentation PHP-Ffmpeg