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Bug 26569 - MediaRecorder needs more clarity for handling multiple audio and video tracks
Summary: MediaRecorder needs more clarity for handling multiple audio and video tracks
Status: RESOLVED MOVED
Alias: None
Product: WebRTC Working Group
Classification: Unclassified
Component: MediaStream Recording (show other bugs)
Version: unspecified
Hardware: PC Windows NT
: P2 normal
Target Milestone: ---
Assignee: public-media-capture@w3.org
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Reported: 2014-08-13 12:10 UTC by Giji Gangadharan
Modified: 2015-03-10 17:40 UTC (History)
3 users (show)

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Description Giji Gangadharan 2014-08-13 12:10:28 UTC 
There is no clarity in using mimetype for a MediaStream having multiple audio and video tracks. 
In case of multiple video tracks, all will get encoded in same format. There is no explanation to record different tracks in different format.
Comment 1 Harald Alvestrand 2014-08-13 12:27:22 UTC 
Normally the mediatype (MIME type) would indicate the container format, and whatever parameters the container format uses to indicate which codecs the file contains.

For instance, the .webm file extension, with MIME type video/webm, is normally using the OGG Vorbis audio codec and the VP8 video codec.

The spec needs to be clear that the MIME type is the container's MIME type; that may be obvious to some, but not to all.
Comment 2 Giji Gangadharan 2014-08-21 14:05:48 UTC 
Consider a case where a MediaStream has multiple video tracks (MediaStreamTrack). Here, the same container format (MIME Type) will be used for recording all the tracks?
Comment 3 Dominique Hazael-Massieux 2015-03-10 17:40:49 UTC 
moved to github https://github.com/w3c/mediacapture-record/issues/5