2018-10-07 19:50 GMT+02:00, Philip Langdale <phil...@overt.org>: > Currently, ffmpeg defines a set of YUV444P formats for use where > the bits-per-pixel are between 8 and 16 bits. In these formats, > the bits are packed in the MSBs of the 16 bits of available storage. > > On the other hand, all the hardware vendors have defined their > equivalent formats with the bits packed in the LSBs, which has the > virtue of making the memory layouts compatible with being treated
> as full 16 bit values (which is also why P010 is defined this way). (This does not sound like a good reason but this is not related to this patch.) > So, to be able to use these hardware compatible formats, we need > definitions for them in ffmpeg. Right now, I need this for nvdec, > but Vulkan also uses the same format definitions. Sorry if this was already done and I forgot but please explain why you cannot use YUV444P16 for this use-case. If the only thing missing is libavfilter understanding bits_per_raw_sample we should add it there: It is needed in any case and would save us a few pix_fmts and could speed up many use cases compared to your solution. Thank you, Carl Eugen _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
