[FFmpeg-user] bgra to yuv

[Josh long]

On Mon, Mar 26, 2012 at 9:38 PM, Paul B Mahol <onemda at gmail.com> wrote:

> On 3/27/12, Josh long <funkyirish at gmail.com> wrote:
> >>
> >> libschroedinger encoder in FFmpeg supports only yuv420p, yuv422p and
> >> yuv444p.
> >>
> >> If your input is not one of this above you can not expect encoding to be
> >> lossless.
> >>
> >>
> > Thanks.  I realized that I made a typo above;  I'm now converting to
> > yuva420p, and then to yuv444p.  Any ideas on why the image splits?
>
> yuva420->yuv444 is not lossless either.
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aha, thanks I suppose I've not done my homework.  Do you know of any routes
that would be lossless?  I have strong suspicions that the alpha channel in
my bgra files is not significant (meaning that it is a constant ff when
looking at it in a hex editor).