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Re: [mediacapture-record] How to concatenate Blobs of recordings into single file capable of playback?

From: guest271314 via GitHub <sysbot+gh@w3.org>
Date: Fri, 21 Jul 2017 23:55:01 +0000
To: public-media-capture-logs@w3.org
Message-ID: <issue_comment.created-317137257-1500681299-sysbot+gh@w3.org>
@yellowdoge Current code http://plnkr.co/edit/dNznvxe504JX7RWY658T?p=preview version 1 using `Blob URL`, version 2 using `MediaSource` evolved from https://github.com/guest271314/OfflineMediaContext, see also https://github.com/whatwg/html/issues/2824. 

In the interim tried `mkvmerge -o output.webm -w file1.webm + file2.webm` at `terminal` following [Joining webm videos under Linux](https://superuser.com/q/421130/) though error was logged

```
No append mapping was given for the file no. 1 ('file1.webm'). A default mapping of 1:0:0:0 will be used instead. Please keep that in mind if mkvmerge aborts with an error message regarding invalid '--append-to' options.
Error: The track number 0 from the file 'file2.webm' cannot be appended to the track number 0 from the file 'file1.webm'. The track parameters do not match.
```
Both `file1.webm` and `file2.wemb` were created using `MediaRecorder`.

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Received on Friday, 21 July 2017 23:55:03 UTC

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