[Bug 790026] qtdemux: Add support vp9 codec

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=790026

--- Comment #4 from Seungha Yang <pudding8757 at gmail.com> ---
(In reply to Sebastian Dröge (slomo) from comment #3)
> Review of attachment 363157 [details] [review]:
> 
> ::: gst/isomp4/qtdemux.c
> @@ +13938,3 @@
>        break;
>      case FOURCC_VP80:
> +    case FOURCC_vp08:
> 
> You probably want to add both to the muxer too, and make the muxer use the
> official "vp08" one instead. Not sure where "VP80" comes from. Needs some
> research

I googled and I'm not sure where the "VP80" came from (for qtdmux)...

https://en.wikipedia.org/wiki/VP8 is saying that the fourcc of vp8 is "VP80".
But, I guess it should be used only for VP8 Video For Windows codec
(http://www.optimasc.com/products/vp8vfw/index.html), so I think "vp08" is
proper expression in isobmff based on spec.

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