[FFmpeg-devel] [PATCH 2/2] Adding AlphaMode element to Matroska Parser

Vignesh Venkatasubramanian vigneshv at google.com
Tue Feb 5 19:40:11 CET 2013

On Mon, Feb 4, 2013 at 10:15 PM, Hendrik Leppkes <h.leppkes at gmail.com> wrote:
> On Tue, Feb 5, 2013 at 12:17 AM, Vignesh Venkatasubramanian
> <vigneshv at google.com> wrote:
>> Adding support for parsing AlphaMode element in the Track header
>> and export that information as a metadata tag. This flag indicates
>> presence of alpha channel data in BlockAdditional element.
> I see no mention of this in the Matroska spec, or any discussion
> related on the matroska mailing list?
> Before inventing new ids, it should be standardized in the Matroska
> spec, imho, or you'll end up with files that only work properly in
> ffmpeg, for example.

I submitted this patch a little early. AlphaMode flag has been added to
matroska spec now.
Here is the link: http://matroska.org/technical/specs/index.html#AlphaMode

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Vignesh V | Software Engineer | vigneshv at google.com | 650-861-1330

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