<durandal_1707>
Lynne: found epxired dolby patent that describes exactly how this lossless matrix transformation is done
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<Lynne>
durandal_1707: neat, what do they do differently?
<Lynne>
I thought the trig you posted before was solid
<durandal_1707>
Lynne: some eigenvalues and other complex stuff even spectral trasform mentioned
<durandal_1707>
Lynne: that trig is nice trick to make and stereo audio into best M/S stereo
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<durandal_1707>
Lynne: but using exact formula gives incorrect results for R = 2*L
<durandal_1707>
or i interpreted text incorrectly
<durandal_1707>
wrote filter that does this transform, so will try to debug with avectorscope what is happening
<durandal_1707>
actually for such case: R = 2*L , that trig thing can not give optimal solution
<durandal_1707>
iiuc
<durandal_1707>
Lynne: huh, it turns out it can give for R=2*L optimal solution too
<durandal_1707>
its is just some silly atan2 and double missup
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<durandal_1707>
Lynne: main problem that trig is doing rotation of both channels simultaneously
<Lynne>
wdym?
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<durandal_1707>
Lynne: if audios are correlated perfectly (2L=R case) the output coefficients need to give only mono component, but it does not, it just rotates almost near it
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<cone-591>
ffmpeg Lynne master:fec6e84b1868: configure: disable libglslang/libshaderc if the vulkan is disabled
<durandal_1707>
so after rotation i also need to scale
<durandal_1707>
one of channels
<Lynne>
ah
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<Lynne>
Traneptora: nice, you've started to sign your commits too, now there's three of us
<ameyad22h>
Hey guys! Super grateful to ffmpeg for all the time it has saved me on a bunch of tasks
<ameyad22h>
Would love to know how I can start contributing. I didn't explicitly see a list of open issues etc. to fix, so would love to know what'd be a good starting point
<durandal_1707>
trac.ffmpeg.org
<ameyad22h>
Thank you!
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<ameyad22h>
Where can I find more about the dev workflow too? Would also love suggestions on what issues/bugs are high prio and need fixing
<JEEB>
not sure if there is any proper prioritization
<JEEB>
usually if I check trac, I check recent tickets since they can be related to recent changes
<ameyad22h>
Got it, I'm doing that too
<JEEB>
dev workflow is just 1) compile 2) run FATE test suite 3) ??? 4) profit
<ameyad22h>
haha ok
<JEEB>
there's a developer page on the site which had various details on those bits