Not able to create seekable video blobs from mediarecorder using EBML.js - MediaRecorder API - Chrome

[Gaurav Kalia]

https://stackoverflow.com/questions/66480784/not-able-to-create-seekable-video-blobs-from-mediarecorder-using-ebml-js-media

[guest271314]

The last time I checked the code at the second linked plnkr at this post https://github.com/guest271314/MediaFragmentRecorder/issues/8#issuecomment-520287772 created seekable Blobs.

On Thursday, March 4, 2021 at 10:50:19 AM UTC-8 gkalia...@gmail.com wrote:

https://stackoverflow.com/questions/66480784/not-able-to-create-seekable-video-blobs-from-mediarecorder-using-ebml-js-media

[guest271314]

Are you recording both audio and video?

On the server you can use mkvmerge from MKVToolNix to merge multiple WebM files to a single file, or set duration of the combined results from dataavailable with --enable-durations option, without using ts-ebml client side.

[guest271314]

I have not tried the ts-ebml live streaming option https://github.com/legokichi/ts-ebml/blob/d05c476d366afd3ffc2747f3fb84784e61f58142/src/example_mediasource.ts. https://github.com/thenickdude/webm-writer-js creates seekable video/webm;codecs=vp8 and 
https://github.com/kbumsik/opus-media-recorder creates seekable audio/webm;codecs=opus or audio/ogg;codecs=opus files. An example of concatenating multiple discrete WebM files https://github.com/guest271314/native-messaging-mkvmerge in the browser and local filesystem using Native Messaging https://github.com/guest271314/native-messaging-mkvmerge.