Re: [Libav-user] Difficulty decoding libvpx VP8 with Alpha as RGBA

2021-02-01 Thread Craig Turner
> > Am 01.02.2021 um 00:08 schrieb Craig Turner : > > > > You are absolutely right - the format is AV_PIX_FMT_YUV420P, so it seems > the alpha channel is not being decoded. Is there something specific I need > to do to ensure it does indeed get decoded? > > It ma

Re: [Libav-user] Difficulty decoding libvpx VP8 with Alpha as RGBA

2021-01-31 Thread Craig Turner
16:9, 30 fps, 30 tbr, 1k tbn, 1k tbc (default) Metadata: alpha_mode : 1 Regards, Craig On Sun, Jan 31, 2021 at 11:12 PM Carl Eugen Hoyos wrote: > Am So., 31. Jan. 2021 um 22:43 Uhr schrieb Craig Turner > : > > > I'm trying to decode and convert a VP8 v

[Libav-user] Difficulty decoding libvpx VP8 with Alpha as RGBA

2021-01-31 Thread Craig Turner
Hi, I'm trying to decode and convert a VP8 video with an alpha channel to a 32-bit RGBA for rendering in my application. The decoding with libvpx works fine, but I can't get the alpha channel through into the RGBA. Am I doing something wrong with libswscale? Thanks in advance! Craig Here's the