How can I merge two blob audio and video and get one single video blob object

Question

I had use but it always return video without audio

var newBlob = new Blob([video_blob, audio_blob], "video/mp4");

have you checked this question? https://developer.mozilla.org/en-US/docs/Web/API/Blob/Blob https://stackoverflow.com/users/977809/nkron se — gnujoow, Jul 22 '20 at 08:02

score 0 · Answer 1 · answered Jul 22 '20 at 08:06

0

You can't just merge video and audio streams.

The process of joining video and audio streams is called muxing. I've found a library which seems to do just that but on node.js https://github.com/videojs/mux.js/ There is also https://github.com/samirkumardas/jmuxer which seems to be exactly what you need.

Maybe you could look for a player that supports getting video and audio as separate blobs. But video and audio might get out of sync then.

answered Jul 22 '20 at 08:06

Cezary Butler

I have blob url – Bahadur Singh Deol Jul 23 '20 at 08:18
Can you specify what are you trying to achieve? From your question I've assumed you use this blob to playback audio/video content. Am I right? – Cezary Butler Jul 23 '20 at 08:29
I want to screen record with microphone, but I don't find the solutions so i had done seperately screen reocrd and audio record so I want to merge both blob and getting one sigle blob – Bahadur Singh Deol Jul 23 '20 at 10:26
I think it would be great to add some details into your question (eg. what are you trying to do). Another thing is how do you verify if you don't get audio? – Cezary Butler Jul 23 '20 at 11:00

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