如何合并两个 blob 音频和视频并获得一个视频 blob object

Question

I had use but it always return video without audio

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

Answer 1

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.