Using the package FFmpeg, is it possible to combine .m4s files and convert them to .mp4? What code should I use? - Quora
How to combine init.mp4 and .m4s files?? · Issue #3488 · Dash-Industry-Forum/dash.js · GitHub
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javascript - how to add audio to video streaming using media source extension - Stack Overflow
How to Convert File m4s to mp4 and Download File m4s - YouTube
Use FFMPEG to CONVERT (bilibili)m4s video to mp4 - YouTube
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