2025-03-03 01:04
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 7.1.1 has been released! | Please read ffmpeg.org/developer.html#Code-of-conduct
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<
Lynne >
TheVibeCoder: do you have the decompiled opencl chunks or just the opencl programs used to run the prores raw decoder?
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<
Lynne >
I got transforms working, but I want to get the output exact
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<
TheVibeCoder >
Lynne: ghidra
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<
Lynne >
does ghidra identify opencl embedded binary?
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<
TheVibeCoder >
it find is as string
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<
TheVibeCoder >
the kernels are stored as strings
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<
TheVibeCoder >
big strings
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<
Lynne >
lol, really? plaintext strings
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<
Lynne >
oh wow, fucking score
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<
Lynne >
so many separate shaders for each operation, I'd hate to know how slow it is
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<
Lynne >
I've got 512 threads per tile
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<
TheVibeCoder >
plaintext, need to filter out \b\t\nt and similar
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<
TheVibeCoder >
Lynne: you cant get output exact, and codec is not lossless
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<
Lynne >
the idea is to get the brightness to hopefully match
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<
Lynne >
and the bands to disappear in the waveform
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<
TheVibeCoder >
different IDCT?
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<
Lynne >
nah, I doubt that makes a difference
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<
Lynne >
apple are probably using their ASIC FFT/DCT processors which are definitely not bitexact with C
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<
averne >
indecisive_turtl: sounds like a bug honestly, which driverare you encountering this with?
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<
indecisive_turtl >
averne: Testing with nvidia 575 on linux
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<
averne >
I've been working on radv which has been fine. The other day I tested my entropy decode shader on nvidia and it was hanging though :')
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<
indecisive_turtl >
lol
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<
Compn >
pross, btw twocc page looks real nice
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<
Lynne >
got prores raw vulkan fully working
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<
Lynne >
still not exact, but fucking hell its fast
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<
Lynne >
around 6x faster on intel, which is still too slow for realtime
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<
Lynne >
but I can't feed it fast enough on a discrete GPU
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