[FFmpeg-devel] avcodec/hapqa_extract_bsf : add bsf filter for haqqa (to hapq or hapalpha only) conversion (WIP)

[Carl Eugen Hoyos]

2017-11-14 10:55 GMT+01:00 Martin Vignali <martin.vignali at gmail.com>:
> 2017-11-14 1:26 GMT+01:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>
>> 2017-11-13 22:43 GMT+01:00 Martin Vignali <martin.vignali at gmail.com>:
>>
>> > In attach patch to add a new bitstream filter
>> >
>> > The goal is to convert HAPQA file to HAPQ (removing alpha)
>> > or HAPAlphaOnly (remove rgb)
>>
>> Could you explain the usecase?
>
> Split HAPQA in two files can be useful when events player doesn't support
> the HAPQA version (two texture). So we need to split in two files
>
> Removing alpha, can be useful when graphic artist, output file with alpha,
> but alpha can be "replace" by blending mode (so we can reduce size, GPU
> bandwith need (specially when using several high resolution layer))
>
> Only keeping alpha :
> An use, can be to output an HAPQA using Quicktime official plugin (who
> doesn't support HAP Alpha Only), and keep only the Alpha part. In other
> words, it's a way to create HAP Alpha Only file

Thank you!

No more comments from me, please wait for others.

Carl Eugen