On Sat, 9 May 2020 at 22:29, Soft Works <softwo...@hotmail.com> wrote:
> > -----Original Message----- > > From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of > > Max Dmitrichenko > > Sent: Saturday, May 9, 2020 10:42 PM > > To: FFmpeg development discussions and patches <ffmpeg- > > de...@ffmpeg.org> > > Subject: Re: [FFmpeg-devel] [PATCH v4 03/11] libavutil/hwcontext_d3d11va: > > adding more texture information to the D3D11 hwcontext API > > > > > You can document that wherever you want, but for existing users, > > > command lines that have always been working before will stop working > > > in a significant number of cases. > > > > > > > > not sure where it goes: if a user uses new version - there are new > aspects to > > consider > > Is that so? Whether or not that is acceptable for ffmpeg is not up to me > to decide, though. I'm just trying to illustrate the consequences. > > > > > But still, even with your patch: What will happen when DX11 is not > > > available? > > > > > > Will it > > > > Please read the patch > > > 1. fail? > Yes > > > 2. or will it use D3D9 instead? > No automatic fallback to D3D9, D3D9 is selected by explicit command line only > > > > > > > > there should be no secrets here - implementation is available, do you see > > fallback implementation? > > Yes, I'm seeing that indeed: > > Mark Thompson asked: > >> > + mfxIMPL impl = MFX_IMPL_AUTO_ANY | MFX_IMPL_VIA_D3D11; > >> > >> Does that still do the right thing on systems where only D3D9 works? > yes, it works with DX9. This flag is mandatory only for DX11. > > You replied: > > yes, it is only a hint for D11 when possible. > > I would understand 'when possible' in a way that D3D9 would be used > 'when not possible'. > > If that's true, it means, that an ffmpeg user executing a command line > cannot be sure whether D3D9 or DX11 will be used. That would mean > that the behavior is not deterministic. > This is not true, it is your assumptions. Behavior is deterministic: DX11 by default. DX9 if user selects it explicitly via command line. > > Regards, > softworkz > > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". Regards, Artem. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
