michaelni changed the topic of #ffmpeg-devel to: Welcome to the FFmpeg development channel | Questions about using FFmpeg or developing with libav* libs should be asked in #ffmpeg | This channel is publicly logged | FFmpeg 7.0.2 has been released! | Please read ffmpeg.org/developer.html#Code-of-conduct
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<Lynne>
IndecisiveTurtle: ping
<Lynne>
do you think an extension is necessary?
<IndecisiveTurtle>
Probably yes. At the moment I am debugging some issues on my AMD gpu (seems to spam invalid slice sizes for some reason). Then need to optimize legall fully, add interlacing support (prob not that bad) and cleanup any remaining loose ends and minor glitches from quantinization
<IndecisiveTurtle>
Is there anything else I should add to my mental list in your opinion, so can at least keep a milestone for completion
<Lynne>
IMO you could skip on interlacing for now
<IndecisiveTurtle>
It didn't look that bad to implement when I saw it, but yeah not on the top of priorities vs the bug fixes and perf profiling
<IndecisiveTurtle>
Also been wanting to ask, what is the proper way of querying the chroma x and y shifts when vulkan is used? Back when I was bring the whole thing up I noticed that av_pix_fmt_get_chroma_sub_sample returns zero here, so not correct. So hardcoded it 1/1 to match the input format. Noticed it again just now and would like to remove
<Lynne>
you need to use the sw_format from avhwframescontext
<Lynne>
I'll ask for an extension
<Lynne>
not sure how it works, I've never had to, is there a hardcoded new date or just any date in the future
<IndecisiveTurtle>
Thanks and appologies for the trouble. I'll be available daily here to update you on progress on this
<IndecisiveTurtle>
Re for chroma, I searched a bit and found the nlmeans filter calls av_pix_fmt_desc_get with the vkctx output format and takes log2_chroma_w from the desc. Is that similar to using sw_format as you mentioned or an example somewhere
<Lynne>
the vkctx format stuff is more for filters
<IndecisiveTurtle>
Ah so prob wont work here either, sadge
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<dre-droid>
Hi all,
<dre-droid>
I have worked on implementing some new features for computing enhanced SSIM (minkowski pooling and using integral images). As of right now I have done so by adding some options to the existing ssim filter in libavfilter, but was wondering if separating it into a new essim filter would be prefered by the comunity?
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<compnnn>
i talked myself into going to vdd i guess
<compnnn>
passport still good for a number of years
<compnnn>
j-b i'm not too late to register am i? :D
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<yigithanyigit>
yigithanyigit: hello
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<yigithanyigit>
Should metadata propagation be done to AVFrame instances passed into a filter function? Is it a valid approach to create metadata(a dictionary) in the context and propagate it to that context? Thanks.
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<BtbN>
Isn't ffv1 a codec, and nut a container?
<jamrial>
yeah
<BtbN>
Then I'm confused about that mail
<Lynne>
its a codec, alongside magicyuv, utvideo, h264 pcm, fraps
<Lynne>
so why would anyone write their own when there were already so much choices historically?
<BtbN>
I mean, to a degree, yes. But none of these were "under ffmpeg control" or flexible
<Lynne>
well, there you go
<BtbN>
So extending nut isn't an option?
<Lynne>
no
<Lynne>
the nut spec was written in the days where saving the last few bytes was considered paramount to anything else, including robustness
<Lynne>
to the point where headers have golomb coded values
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