Re: Extending MediaRecorder to record from Web Audio node faster than real time?

The current draft cites the addition of a Track during recording as an example of the kind of thing that could cause the MediaRecorder to raise a fatal error: IllegalStreamModification.  Maybe this case needs more discussion, but the current language doesn't allow the Recorder to continue ignoring the new Track.

Jim Barnett
Genesys

> On Aug 27, 2014, at 12:05 PM, Harald Alvestrand <harald@alvestrand.no> wrote:
> 
>> On 08/27/2014 05:57 PM, Chris Wilson wrote:
>> Is a MediaStream (and Recorder) going to be happy about having its number of channels changed in mid-stream?
> 
> MediaStreams can have tracks added and removed at any time; they're rather flexible.
> 
> Recorder has certain issues with that, since some of the formats we want to record to don't do things like multiple video tracks where some of them start midstream.
> 
> The recorder spec will have to say what it does when such things happen (either error out or continue recording only on the tracks present at initialization).
> 
>> 
>> 
>>> On Wed, Aug 27, 2014 at 8:26 AM, Harald Alvestrand <harald@alvestrand.no> wrote:
>>>> On 08/27/2014 03:35 AM, Robert O'Callahan wrote:
>>>> BTW as far as "details to be worked out", I don't think there's anything new here to figure out (although there is a bit more text to write). "new MediaRecorder(audioNode)" should behave almost exactly like "var dest = audioNode.context.createMediaStreamDestination(); audioNode.connect(dest); new MediaRecorder(dest.stream);". The only edge case I can think of is handling ChannelSplitterNode.
>>> 
>>> If it should behave "almost exactly like", can we define it to behave "exactly like"?
>>> 
>>> Including a possible error exception when encountering ChannelSplitterNode?
>>> 
>>> If there are two ways of doing the same thing, I'd like to have completely consistent behaviour rather than "almost consistent behaviour".
>>> 
>>> 
>>>> 
>>>> Rob
>>>> -- 
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>