[FFmpeg-user] bgra to yuv

[Paul B Mahol]

On 3/27/12, Josh long <funkyirish at gmail.com> wrote:
> 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).

Note that it may be vlc bug if it fails to properly decode yuv444.