| Tuesday, February 18th, 2020, 04:29 UTC | ||
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| [09:13:42] | MythNotifyBot__: | Service: HTTP Trac is Down – HTTP 503 – Service Unavailable |
| [09:20:49] | MythNotifyBot__: | Service: HTTP Trac is Up – HTTP 200 – OK |
| [09:21:18] | stuarta: | hampton: sure, i'll set it up and PM you a password |
| [09:21:56] | stuarta: | hampton: actually, if you duplicated it, just update the name in the config, and i'll just copy the pw from the previous one |
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| [10:06:10] | stuarta: | hampton: your f30 builder has gone on holidays |
| [10:10:41] | stuarta: | hampton: build master is ready for f32 worker |
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| [11:31:00] | markk_: | warpme_: I think maybe the best approach is to use the v4l2 driver name (e.g. meson-vdec) to drive the number of buffers? but you still lose some frames with anyway? is there a problem with the audio driver? |
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| [11:44:49] | warpme_: | markk_: i also was thinking about such "auto" approach and at this moment I'm still thinking adding advanced user setting i.e in v4l2 playback profile may make more sense. For me this is quite similar to #CPU (so category being highly platform dependent like: v4l2_m2m, v4l2_request, nvidia blob, etc and runtime dependent: #CPU cores in particular user hardware). As RAM might be low on some devices, I can suspect |
| [11:44:49] | warpme_: | careful fine-tuning of #cap_buffers will be needed – from support/maintenance perspective I would highly prefer to go with advanced user setting and leave this to user fine-tune (if needed). Maybe such setting should be presented to user only when v4l2 decoder is selected?. Generally I want to avoid support multiple try-see with low RAM users where we will do fine-tune # of cap_buffers by: |
| [11:44:49] | warpme_: | change_value->recompile->send_to_user->see_results.... |
| [11:49:23] | warpme_: | markk_: "but you still lose some frames with anyway? is there a problem with the audio driver?" – this I want to investigate a bit more. I'll played with v4l2 cap & output buffers and also with audio read-ahead. No correlation. So maybe alsa pre-alloc?. Is there way to deduce from myth log and reason for frame loss? |
| [11:50:16] | markk_: | warpme_: when I get my pi4 back up and running I'll check – but I'm not actually sure the pi needs the number of capture buffers adjusting anymore. I think it might be a relic of when I was first testing. on the subject of RAM – are there actually any supported boards that have less than say 2gb of memory? |
| [11:51:12] | warpme_: | yes. there are many tv boxes with 1G of ram with very attractive pricing (i.e. 20$). |
| [11:52:59] | warpme_: | btw: also seeking on amlogic hw needs some fixes as now it is quite "strange".... |
| [11:53:28] | warpme_: | i need go out for 30–40min. will return soon! |
| [11:54:04] | markk_: | warpme_: what I've noticed on the pi4 is that the audio timings are quite erratic. If I change the avsync code to only drop frames when it is more than 50ms out (current is 30ms) – then it drops less frames, but no obvious impact on quality. but that shows up quite clearly in the logs either way. your logs yesterday just show the decoder being starved of buffers. I wonder if there is some low level problem with audio and video |
| [11:54:05] | markk_: | sharing resources/interrupts somewhere (on the s912 that is) |
| [11:55:30] | markk_: | warpme_: yes – seeking is a an issue with v4l2 at the moment. it's improved – but the initial av sync is very broken and it drops lots of frames before it sorts itself out. probably just a one liner somewhere. |
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| [13:13:41] | warpme_: | Mark: will You find energy+motivation to look on v4l2_request? This is last missing kid-in-the-block leaving rockchip/allwinner/qualcomm/nxp unsupported... |
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| [13:41:21] | ** stuarta builds an ubuntu-20.04 build worker ** | |
| [13:42:59] | stuarta: | well maybe not, crashed the installer |
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| [14:19:13] | stuarta: | ah well, lets install 19.10 and upgrade then |
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| [14:54:06] | markk_: | warpme_: I'm focused on sorting out the various small issues for v31 at the moment. I do intend to get back to v4l2 request – though I'd really like some sort of setup where I can easily test code. e.g. a full linux install:) |
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| [14:57:33] | warpme_: | markk_: perfect!. Probably best will be to go with armbian (debian distro for arm boxes). Let me look what is today available for tanixTX6 (this is HW You have – right?) |
| [14:57:56] | markk_: | warpme_: yes – tanixtx6 |
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| [15:16:34] | warpme_: | ok – i'll return to you when gather some info/experience ;-p |
| [15:18:27] | markk_: | warpme_: i did have a dig around a few weeks ago but didn't get very far |
| [15:20:31] | stuarta: | yay ubuntu-20.04 builder up and running |
| [15:21:02] | warpme_: | yeah – getting armbian needs some drilling. Lest see what they offer out-of-box and what will be needed to compile from sources to get working video decode, 3d rendering and working audio.... |
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