[FFmpeg-devel] [PATCH] bmpenc: support for BGRA

[Carl Eugen Hoyos]

Paul B Mahol <onemda <at> gmail.com> writes:

> >>      switch (avctx->pix_fmt) {
> >> +    case PIX_FMT_BGRA:
> >> +        avctx->bits_per_coded_sample = 32;
> >
> > I tested a similar patch and the problem is that ImageMagick does not show
> > the
> > alpha channel for our encodes,
> 
> That's because our encoder create version 3 files instead of version 4.
> 
> Version 4 have header size of 108 bytes instead of 40.

Thank you for clarifying, that is why I thought we should either always write
version 4 or write version 4 for RGBA.

Carl Eugen