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Re: [mediacapture-record] Should a dataavailable event be dispatched in case there is no available data

From: youennf via GitHub <sysbot+gh@w3.org>
Date: Fri, 26 Oct 2018 10:12:14 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-433359650-1540548733-sysbot+gh@w3.org>
> The UA might still fire `onDataAvailable` events with a `Blob` of size 0 if there is no new available encoded+multiplexed data -- this might happen if the user calls `requestData()` explicitly, or if the `|timeslice|` parameter supplied to `start()` is too small. JS code in my experience checks for blob size zero routinely.

For requestData, it probably makes sense to mandate such event.
For the other cases, I am wondering whether web apps will break if we decide to not fire such events when there is no data. @yellowdoge, wdyt?

That would allow two things:
- Applications not using requestData will no longer need this if check
- Browser will not have to create these blobs (creating a blob might trigger unnecessary overhead like IPC).


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