On Fri, 21 Nov 2014 10:51:52 +0100 wm4 <[email protected]> wrote:
> On Fri, 21 Nov 2014 10:43:15 +0100 > Alexis Ballier <[email protected]> wrote: > > > On Fri, 21 Nov 2014 10:15:29 +0100 > > Jean-Baptiste Kempf <[email protected]> wrote: > > > > > On 21 Nov, Alexis Ballier wrote : > > > > > So you have a format outputted that is of no use, except if > > > > > you use the filter. > > > > > > > > On MFCv5 yes; I don't assume because I'm working on this that > > > > it is the only one :) > > > > > > So, basically, noone can display it, reencode or do anything with > > > it, without the filter. > > > Therefore, you should not introduce a new fmt for this. > > > > First, I fail to see how this differs from AV_PIX_FMT_VDPAU & > > friends. > > AV_PIX_FMT_VDPAU is marked as hwaccel format, and thus completely > opaque. It can't be cropped, copied, etc. - just passed around. It > also means the generic AVFrame code can't allocate frames of such a > format. > > Personally I'd have much less of a problem with this if it were to be > marked as opaque. I didn't know such "opaque" things existed; it probably makes more sense with it indeed. How should I do it ? add .flags = AV_PIX_FMT_FLAG_HWACCEL and be done ? I would like to keep 'av_pix_fmt_count_planes()' working for it at least [...] > It also means that _every_ software which wants to use this new > decocer has to know how to insert the filter etc. - what's the point? This could be "fixed" by adding support in swscale for it, but I see little to no point to it. I think you have to specifically ask for v4l2m2m codecs if you want to use them do hw (de/en)code; so why not do everything in hw and also setup the filter ? (note: I shall write some doc about all this once this has settled) > But if it just works without requiring the API user to jump through > hoops, I see at least some value in it. Would AV_PIX_FMT_FLAG_HWACCEL be enough ? Alexis. _______________________________________________ ffmpeg-devel mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
