[FFmpeg-user] bgra to yuv

Josh long funkyirish at gmail.com
Fri Mar 2 23:07:16 CET 2012

I've been given raw bgra files from a client in a school project and want
to compress them with dirac, so that I can later parallelize the code.

On Fri, Mar 2, 2012 at 2:43 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> booglyboo <funkyirish <at> gmail.com> writes:
> > I've been trying to convert a 1920x1080 BGRA 30 fps video (no sound)
> which is
> > in the avi container into a yuv file for the purpose of using dirac for
> > compression.
> [...]
> > but the framerate messes up and the file size changes so dramatically
> that I
> > don't believe the conversion was lossless.
> I don't think you can (easily) convert lossless from bgra to yuv,
> at least not to yuv420p.
> Please try to explain what you want to do (FFmpeg supports dirac encoding
> via external library, so while I don't think you will get satisfying
> results with dirac, there is no need to go through an uncompressed
> file), then provide the command line you used together with complete,
> uncut console output and explain what went wrong.
> Carl Eugen
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