[FFmpeg-devel] [PATCH] Extract rotation in MOV metadata

[Dave Badia]

On Wed, Apr 6, 2011 at 3:12 AM, Tomas Härdin <tomas.hardin at codemill.se> wrote:
> James Zern skrev 2011-04-06 02:50:
>>
>> Couldn't this be more generically extracted as the acos of [0][0] then
>> verified against [1][1]?
>
> Or even better, also verify [0][1] == -[1][0] and use atan2() of [0][0] and
> [0][1] (or [1][0], depending on how the matrix is stored).
>
> /Tomas

Sorry I'm afraid these suggestions are over my head as it's been too
many years since I've taken trigonometry.  I can help by testing any
patches that are put out.  Personally it doesn't matter to me how the
patch functions as long as there is a way to extra this data at the
application level.

Thanks!
Dave