Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

On Fri, May 11, 2018 at 10:10:42 +0200, Niklas Haas wrote: > Thinking about this logic again, I came to realize that a different > strategy might be to check instead for a minimum threshold brightness > difference in a critical number of different areas of the screen. This > way, a very bright

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

> The way my scene change detection heuristic works like this: I trigger a > scene change (and therefore discard the frame averaging buffer) if the > distance between the current frame average brightness and the current > running average exceeds a threshold value, that threshold being (by >

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

Hello Ruiling, > Thanks for sharing your idea with me. I basically also noticed some poor > quality tone mapping result for some hdr stream. > I will try your suggestion to see whether I can make it in good state so I > can include it in next version. > In fact I have not thought detecting

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

Hello Niklas, Thanks so much for your valuable feedback. > -Original Message- > From: Niklas Haas [mailto:ffm...@haasn.xyz] > Sent: Saturday, May 5, 2018 2:00 AM > To: Song, Ruiling > Cc: ffmpeg-devel@ffmpeg.org; s...@jkqxz.net > Subject: Re: [FFmpeg-devel,RFC]

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

> Am 05.05.2018 um 20:41 schrieb Rostislav Pehlivanov : > > On 5 May 2018 at 18:40, Daniel Oberhoff > wrote: > >> >>> >>> As a last note, you can find my GLSL(+Vulkan) implementations of the >>> algorithm changes described above, as well

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

On 5 May 2018 at 18:40, Daniel Oberhoff wrote: > > > > > As a last note, you can find my GLSL(+Vulkan) implementations of the > > algorithm changes described above, as well as all of the related > > color-management code and various decision logic for what values

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

> > As a last note, you can find my GLSL(+Vulkan) implementations of the > algorithm changes described above, as well as all of the related > color-management code and various decision logic for what values to > infer/default here: >

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

Another thing that came to my mind: On Fri, 4 May 2018 15:32:58 +0800, Ruiling Song wrote: > +static int tonemap_opencl_filter_frame(AVFilterLink *inlink, AVFrame *input) > +{ > +AVFilterContext*avctx = inlink->dst; > +AVFilterLink *outlink =

Re: [FFmpeg-devel] [FFmpeg-devel, RFC] lavfi: add opencl tonemap filter.

Hello Ruiling, On Fri, 4 May 2018 15:32:58 +0800, Ruiling Song wrote: > It basically does hdr to sdr conversion with tonemapping. > > Signed-off-by: Ruiling Song > --- > This patch tries to add a filter to do hdr to sdr conversion with