Monday, 2016-06-27

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mithroCarlFK: Flashing the eeprom is a little more tricky than I had hoped02:11
mithroCarlFK: bblr - lunch02:11
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CarlFKmithro: k02:29
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mithroCarlFK: are you able to test ssk1328's heartbeat code?03:34
sab_123mithro, ping03:40
CarlFKmithro: I don't see anything new in HDMI2USB-firmware-prebuilt/archive/master03:45
mithroCarlFK: it hasn't been merged yet, so you need to build it from source03:46
CarlFKthen no03:46
mithroCarlFK: Okay, so I'll have to spend time working on that instead of making the eeprom flashing working03:47
mithrosab_123: just replied to your email03:49
sab_123mithro, got it03:49
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xfxfCarlFK: sorry, been busy the last few days - glad you got the blackmagic stuff working.  the sync issues i was having might be fixed upstream, i dunno, recommend treating what i've said a possibility, not the absolute06:52
xfxfi did try upgrading my 16.04 notebook that gstreamer/vocto was crashing on two nights ago... and voctocore now loads without segfaulting06:53
xfxfso somebody fixed something \o/06:53
CarlFKxfxf: oh yeah, I forgot about the crashing all the time06:53
xfxfsorry, that gstreamer/vocto was crashing on when 16.04 first came out.  i upgraded it two days ago and it not works06:54
xfxfthis wasn't crashing all of the time, it would crash completely on trying to load voctocore06:54
xfxflike it would never load ever on 16.0406:54
xfxfi did some debug logs for the devs and they said it was def a gstreamer bug and to log with them06:54
xfxfthis was months ago06:54
CarlFKyeah, im running 16.04 here, seems to be fine06:54
xfxfi'll try upgrading the deploy scripts you guys made at LCA to 16.04 and see what happens06:54
xfxfhopefully the decklink bug is fixed in the version of gstreamer it uses06:55
xfxfi think a new gstreamer came out shortly after it, not sure how many months before release ubuntu freeze06:55
CarlFKsomething changed between 15.10 and 16.04 for the better06:56
CarlFKregarding the gst declink thing06:56
CarlFKon 15.10 I needed to run gst-master (git tip?) else it would .. crash? stop?  something bad after like 2 minutes06:56
xfxfoh humm06:57
xfxfsays 1.8.206:57
tpbTitle: Xenial (16.04) : gst-plugins-ugly1.0 package : Ubuntu (at
tpbTitle: GStreamer 1.8 release notes (at
xfxf1.8.2 is super recent, like, this month06:57
xfxfare ubuntu versioning their stuff different or do they now track minor revisions from upstream within a release?06:57
xfxfactually maybe i'm mis-remembering, i thought debian policy was to freeze a release entirely and only backport fixes06:57
xfxfbut maybe they always tracked minor releases06:58
xfxfeither way, that fills me with confidence, good06:58
CarlFK         Uploaded:         2016-06-2206:58
CarlFKthat was like 4 days ago06:58
xfxfyeah but that's reflective of a build/upload date, not nessecarily upstream06:59
tpbTitle: History for sys/decklink - GStreamer/gst-plugins-bad · GitHub (at
xfxfi can see thaytan's commit there + a few others07:03
xfxfmaybe that bug is fixed07:03
xfxfin 1.8.207:03
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CarlFKxfxf: can you give me some pointers on which of the 3 720 modes I should be using ?07:26
CarlFKgst-inspect-1.0 decklinkvideosrc07:27
xfxfhow do you mean07:27
CarlFK                           (17): HD720 50p        - 720p5007:27
CarlFK                           (18): HD720 59.94p     - 720p599407:27
CarlFK                           (19): HD720 60p        - 720p6007:27
xfxfYou use the one that matches your other inputs and what your camera is outputting07:28
xfxfFor you that's probably 1807:28
CarlFKdoes the hdmi2usb 's output matter ?07:28
xfxfyou don't want to drop frames mixing multiple sources07:29
xfxfyou want all at the same framerate07:29
xfxfOr it'll look a bit rubbish with motion07:29
CarlFKthat sounds like Yes07:29
xfxfAssuming gst pipelines convert07:29
xfxfSo yes07:29
CarlFKHDMI2USB>m list07:31
CarlFKmode 9: 1280x720 @60Hz07:31
CarlFKmode 10: 1280x720 @50Hz07:31
CarlFKdoes usa's 60hz matter ?07:31
xfxfit depends on your camera07:31
CarlFKI have been using 907:31
CarlFKthat's the HDMI2USB07:31
xfxf60hz is prob ideal for you yes07:31
CarlFKso HDMI2USB mode 9: 1280x720 @60Hz07:32
CarlFKcamera / declink 59.94 or 60 ?07:33
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CarlFKvocto is set to: width=1280,height=720,framerate=30000/100108:06
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xfxf30000/1001 is exactly 59.94/208:38
xfxfwell, not exactly, but to several decimal places08:39
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ssk1328mithro: I had confusions in the RLE mask thing. I have added some more comments, but I guess we should discuss this in one on one chat.11:07
ssk1328mithro: The code for float to int8 csc conversion is located in csc-update branch of my forked HDMI2USB-misoc-firmware repository, here
tpbTitle: HDMI2USB-misoc-firmware/gateware at csc-update · ssk1328/HDMI2USB-misoc-firmware · GitHub (at
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shenkimithro: see this?
tpbTitle: Ludicrously cheap HDMI capture for Linux (at
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mobydikcCarlFK: easy way to setup grabber (second channel in gui) to a custom image?23:09
CarlFKmobydikc: heh - the DebConf folk were just working on that23:09
CarlFKmobydikc: there are a few reasons you might want that.. what are you trying to do?23:10
mobydikcI'm trying to be lazy23:29
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mobydikcI figured I could just setup the image on a computer and use the hdmi capture ethernet thingy unit23:30
mobydikcBut it's taking me longer to setup the studio for video shots than I thought23:30
mobydikcSo if there was an easy short cut, I figured I'd ask. I know, there's --help and stuff, but I'm vacuuming the stage23:31
mobydikcIt's basically like a presentation where the presenter has one slide23:32

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