[FFmpeg-devel] Pixel format 12bit grayscale

[Carl Eugen Hoyos]

Michael Niedermayer <michaelni <at> gmx.at> writes:

> On Mon, Apr 13, 2015 at 09:59:57AM +0000, Marco Porsch wrote:

> > Previously we had regular 16bit RAW that worked like a 
> > charm as input to FFmpeg. The naïve approach of upscaling 
> > the 12bit to 16bit destroys the compression efficiency of 
> > course...
> 
> add a AV_PIX_FMT_GRAY12BE / AV_PIX_FMT_GRAY12LE similar to 
> the existing planar 12 bit YUV formats, and add a decoder 
> which decodes this odd packing above into it, then add 12bit 
> gray support to FFVHUFF theres alreeadyy support for other 
> 12bit planar formats in it

Whats wrong with using GRAY16 and setting bits_per_raw_sample?
I believe ffv1 already supports reading bits_per_raw_sample, 
ffvhuff could be patched and no additional colour space will 
be needed. Or is there hardware or an external library that 
supports GRAY12?

Carl Eugen