Hi,

GStreamer ffmpeg decoders/encoders for wmv and vc1 use this mime type: "video/x-wmv" and in caps with have 2 fields (+ usual width/heigh/framerate fields): wmvversion = {1,2,3} format = (fourcc)WVC1

format field is only set for VC1 streams to distinguish them from wmv3 streams

To summarize: wmv1 = "video/x-wmv, wmvversion=1" wmv2 = "video/x-wmv, wmvversion=2" wmv3 = "video/x-wmv, wmvversion=3" vc1 = "video/x-wmv, wmvversion=3, format=(fourcc)WVC1"

Benjamin

2011/5/31 Rob Clark rob.clark@linaro.org

All,

In context of a vc1 parser, I've posted the Annex L section from the vc-1 spec. This describes the format that is used by TI vc-1 decoder for simple and main profile.

https://docs.google.com/a/linaro.org/viewer?a=v&pid=explorer&chrome=...

Advanced profile is something different... just a start code. I'm not entirely sure offhand the name for the format used for advanced-profile, but it is different from simple/main profile.

Also, here is the relevant code from the GStreamer plugin for TI VC-1 decoder:

https://github.com/robclark/gst-ducati/blob/master/src/gstducativc1dec.c#L12...

We need to somehow:

a) identify if there are any other possible formats that decoders expect b) choose caps field name(s) and values to uniquely identify the different formats, so a vc1parser element could do the necessary conversion

BR, -R

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