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 7.0.1 has been released! | Please read ffmpeg.org/developer.html#Code-of-conduct
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<cone-986>
ffmpeg J. Dekker master:fa5a6055422a: avcodec/riscv: add h264 dc idct rvv
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<JEEB>
heh, H.273 2023-09 is finally officially public as there is a new version now :D
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<JEEB>
(they were waiting for SMPTE ST 2128 to be published before they made a spec public referring to it, but apparently having a newer version causes forced publication)
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<Lynne>
what was it they added?
<JEEB>
2023-09 just added the new matrix coefficients values (IPT-C2 and the Re|Ro YCgCo variants) that got in a while ago when it became clear that the final drafts were approved etc.
<JEEB>
not sure what 2024-07 contains, but possibly they removed reference to SMPTE ST 2128 as it can't yet be referred to
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<JEEB>
oh huh
<JEEB>
they're adding alpha flagging etc into VUI o_O
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<JEEB>
specifically primaries :D
<JEEB>
> 128 - this signal is an alpha map
<JEEB>
> 129 - this signal is a depth map
<JEEB>
so signaling this in SEI was not enough apparently?
<Lynne>
lol, the version on the website is the unpublished version
<Lynne>
*prepublished
<JEEB>
2024-07 is not yet uploaded, and 2023-09 is just out there now
<JEEB>
I was just looking at JVET-experts documents archive to see what they might have added to 2024-07
<Lynne>
yup, the 09 version is watermarked as prepublished
<JEEB>
yea since they never got SMPTE side to publish ST 2128 so it never got the non-prepublished edition :D
<JEEB>
ah, found what most likely is 2024-07 and indeed
<JEEB>
it just removes the reference to SMPTE ST 2128
<JEEB>
> This fourth edition does not contain new technical content other than minor corrections and clarifications. It removes the informative reference that had been added in the not-yet-published third edition of Rec. ITU-T H.273, due to a publication delay of the referenced document (a video format specification under development in SMPTE).
<Lynne>
updated avtransport, I like how they say 2128 (202x), as if they don't have any confidence it will be published this year either
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<JEEB>
yea that was there in all the drafts
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<JEEB>
and it only stuck there to the end because ST 2128 didn't deliver :)
<JEEB>
which is why now they won't even mention the spec
<JEEB>
> Colour representation developed in SMPTE as IPT-PQ-C2
<JEEB>
that's how it is described in what is going to be 2024-07
<JEEB>
meanwhile in SEI land we have ICC profiles
<Lynne>
err, really?
<JEEB>
since previously someone wanted EXIF/JFIF/IFIF/XMP to be possible to codify in SEI, and now another enum value is apparently going to be ICC profile
<JEEB>
one of the few doc archives that is still public, which I like
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<Lynne>
fixed my mail issue, it was some sieve filter incompatibility
<Lynne>
also I remembered the main reason I didn't look into dovecot was because it didn't have postgres support, and everything I host is already on postgres
<Lynne>
there were some guides published eleven years ago, and since then, dovecot has apparently changed a lot
<JEEB>
yea, seems to be actively developed last I checked
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<elenril>
does it need explicit postgres support?
<elenril>
iirc there's some generic sql module
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<Daemon404>
i continue to never want to run my own mail server
<elenril>
nobody's asking you to, I freely admit it makes little sense unless you find it fun
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<Daemon404>
sort of like multimedia
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<elenril>
audio/video playback is occasionally useful
<Daemon404>
dont be silly we dont watch videos
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<Daemon404>
just look at bits
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<elenril>
you can't run away from your past
<elenril>
we know
<Daemon404>
sasuga
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<Lynne>
haasn: no wonder hwcontext_vulkan upload/download perf is so bad
<Lynne>
rewriting it now
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<haasn>
Lynne: what's the problem with it?
<Lynne>
no pooling of temporary buffers, always allocates/maps 3 buffers even if a single one will do, maps, copies, unmaps, up/downloads rather than map, copy, up/download...
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* Sean_McG
peeks in
<haasn>
Lynne: what do you even use temporary buffers for?
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<Lynne>
if host mapping isn't possible
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<Lynne>
*isn't supported
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<cone-704>
ffmpeg James Almer master:90672974bd4e: fftools/ffmpeg_demux: don't insert the crop filter if frame cropping side data defines no cropping
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<elenril>
jamrial: huh, seems I accidentally moved a part of that patch into the next one
<elenril>
I'll fix it
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<Lynne>
haasn: is a HOST_WRITE/READ barrier needed for buffers before using them?
<Lynne>
specifically a transition from VK_ACCESS_2_HOST_WRITE_BIT to VK_ACCESS_2_SHADER_STORAGE_READ_BIT_KHR
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<shinjite>
Anyone know why pipe read avformat_open_input is broken it does not read pixel format of avi passed through pipe i successfully make win32 read pipe on other end of app and write to file and it reads perfectly. toolchain mvsc 64 bit shared libraries - seemly shared x86 libraries do same thing
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<haasn>
Does AV_EF_EXPLODE have any semantics for encoders?
<haasn>
Or rather, what error value should I check for in order to abort encoding if I expect one frame to be glitched (but presentable)?
<haasn>
I mean, decodable
<Lynne>
for native encoders we control, we simply assert and nuke execution if anything unexpected happens
<haasn>
More specifically, if one frame is missing dolby vision metadata
<haasn>
Lynne: it's outside of our control; user can feed frames with missing DV metadata
<haasn>
and such files exist in the wild
<haasn>
(result of bugs, usually)
<Lynne>
I think you should use avctx->strict for this, rather than EF_EXPLODE
<haasn>
do you reckon it should warn by default, error out on strict; or error out on strict, but warn on unofficial?
<haasn>
technically every frame is supposed to have metadata according to spec so I guess it makes sense to error out in strict mode
<haasn>
in this case it's more of a case of garbage in, garbage out
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<JEEB>
yea, the least you can do is warn so that the user hopefully notices. but garbage-in garbage-out is what one would anyways get in that case.
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<Lynne>
haasn: error out unless strict -1 or -2 IMO
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<Traneptora>
how likely is it that an application would force strict -1 to avoid it rather than fix itself?
<Traneptora>
to work around erroring out on missing metadata
<nevcairiel>
if its for encode, its better to err on the side of making compliant files, and let the user force making invalid ones. it seems unlikely to me for an encoding GUI or such to just want to make files with glitchy frames
<Lynne>
unlikely
<JEEB>
I still recall some places adding `-strict experimental` or so due to some feature otherwise not working, or due to someone cargo culting command lines from circa 2010 when f.ex. the AAC encoder required setting such stuff. but it thankfully shouldn't be the general default of what users do.
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