Search found 59 matches

by mark_k
Tue Jul 14, 2020 10:07 am
Forum: Troubleshooting
Topic: OpenGL not available (Lubuntu 18.04 / mythtv 31)
Replies: 3
Views: 159
Great Britain

Re: OpenGL not available (Lubuntu 18.04 / mythtv 31)

.30 should be fine - you should get OpenGL but I suspect the best performance will be XVideo for video output (probably best to avoid OpenGL on that GPU).

v31 consolidated the rendering code around OpenGL - with GLSL a requirement - and XVideo support was dropped.

Hope this helps
Regards
Mark
by mark_k
Sat Jul 11, 2020 11:47 am
Forum: Troubleshooting
Topic: OpenGL not available (ubuntu 20.04 / mythtv 31)
Replies: 15
Views: 429
Great Britain

Re: OpenGL not available (ubuntu 20.04 / mythtv 31)

From the symptoms, there are 2 possible sources of the problem. - there is a subtle timing issue that means the rendering window is not always receiving the initial 'show' event. - the opengl code path when starting video playback is slightly different somewhere and clears whatever issue is causing ...
by mark_k
Sat Jul 11, 2020 11:25 am
Forum: Troubleshooting
Topic: OpenGL not available (Lubuntu 18.04 / mythtv 31)
Replies: 3
Views: 159
Great Britain

Re: OpenGL not available (Lubuntu 18.04 / mythtv 31)

Unfortunately v31 will not work with that GPU. When EGL is disabled, an OpenGL context is created without issue but it fails to create the GLSL shaders. Looking at:- https://www.x.org/wiki/RadeonFeature/#featurematrixforfreeradeondrivers it looks as if GLSL is not supported for the R200 series of ca...
by mark_k
Sat Jul 11, 2020 11:07 am
Forum: Raspberry Pi
Topic: Mythtv-light v31 de-interlacing not working with V4L2 decoders
Replies: 6
Views: 206
Great Britain

Re: Mythtv-light v31 de-interlacing not working with V4L2 decoders

mtbdrew wrote:
Fri Jul 10, 2020 2:47 am
Any update or ETA on when de-interlacing will be working natively with v31?
It needs a fix to the raspberry pi kernel driver - so assuming someone writes a patch, it will take some time to feed through to raspbian etc.

Regards
Mark
by mark_k
Wed Jul 08, 2020 9:36 pm
Forum: Hardware
Topic: 4k Screen in my future
Replies: 7
Views: 741
Great Britain

Re: 4k Screen in my future

@mark_k: I stumbled upon your thread. This may be a silly question: If broadcast contains HDR will mythtv still play the stream without the HDR information? Yes - streams will still play even if HDR is not fully supported. The results may not be the best however - depending on the content. There is...
by mark_k
Tue Jun 30, 2020 10:54 am
Forum: Raspberry Pi
Topic: on RPi4 - MMAL or V4L2?
Replies: 2
Views: 115
Great Britain

Re: on RPi4 - MMAL or V4L2?

There is no hardware acceleration of MPEG2 on the Pi4 - so it should be falling back to software/FFmpeg decoding regardless of whether V4l2 or MMAL is selected. If there is a difference in playback, it may be due to the different profiles falling back to different defaults - check both are using 4 c...
by mark_k
Tue Jun 30, 2020 10:46 am
Forum: Troubleshooting
Topic: OpenGL not available (ubuntu 20.04 / mythtv 31)
Replies: 15
Views: 429
Great Britain

Re: OpenGL not available (ubuntu 20.04 / mythtv 31)

Good news and bad:) Good news is that the driver does actually support OpenGL debug contexts - so the logs show the errors. Unfortunately it looks like the problem is somewhere in the Qt code - though possibly triggered by our use of Qt. I did a little googling on the chipset - which suggested it su...
by mark_k
Mon Jun 29, 2020 4:07 pm
Forum: Troubleshooting
Topic: OpenGL not available (ubuntu 20.04 / mythtv 31)
Replies: 15
Views: 429
Great Britain

Re: OpenGL not available (ubuntu 20.04 / mythtv 31)

OK - this could be tricky:) Trying to debug a blank screen on older OpenGL versions can be problematic as, assuming an error is actually generated by the driver, we need to catch it just after it is generated (newer versions have debugging extensions that we can use). First up - and this is a long s...
by mark_k
Mon Jun 29, 2020 3:55 pm
Forum: Raspberry Pi
Topic: Mythtv-light v31 de-interlacing not working with V4L2 decoders
Replies: 6
Views: 206
Great Britain

Re: Mythtv-light v31 de-interlacing not working with V4L2 decoders

Thanks Mark I missed that in the release notes sorry. As for the manual selection of de-interlacing, all but "Interlaced" still show Deint : None. That is to be expected. Mythtv is 'detecting' the video as progressive - because it is not flagged as interlaced. So only overriding the scan to interla...
by mark_k
Sat Jun 27, 2020 10:52 pm
Forum: Raspberry Pi
Topic: Mythtv-light v31 de-interlacing not working with V4L2 decoders
Replies: 6
Views: 206
Great Britain

Re: Mythtv-light v31 de-interlacing not working with V4L2 decoders

When watching recordings interlacing lines are visible, playback data shows Deint : None Have tried all the V4L2 profiles with same results. The only profiles that shows De-interlacing are the MMAL Standard and MMAL decode only but video is jagged and unwatchable. However they do show Deint : GLSL ...
by mark_k
Sat Jun 27, 2020 10:30 pm
Forum: Troubleshooting
Topic: OpenGL not available (ubuntu 20.04 / mythtv 31)
Replies: 15
Views: 429
Great Britain

Re: OpenGL not available (ubuntu 20.04 / mythtv 31)

Does the first run (starting at 21.49.02) from that log work? It looks 'normal'.

Likewise - with the run starting as 21.56, apart from the missing Qt logging that is in the first - this looks ok.

Neither seem to have the opengl problem from your first post?

Thanks,
Mark
by mark_k
Sat Jun 27, 2020 6:18 pm
Forum: Troubleshooting
Topic: OpenGL not available (ubuntu 20.04 / mythtv 31)
Replies: 15
Views: 429
Great Britain

Re: OpenGL not available (ubuntu 20.04 / mythtv 31)

To get a little more detail on what is happening in Qt, run mythfrontend like this:- QT_LOGGING_RULES=qt.qpa.gl=true mythfrontend You may want to try disabling EGL (which is used to get better VAAPI performance but will probably not help in your case):- MYTHTV_NO_EGL=1 mythfrontend Either way - post...
by mark_k
Thu Jun 25, 2020 11:41 am
Forum: Troubleshooting
Topic: MythVideo playback profiles
Replies: 31
Views: 1722
Great Britain

Re: MythVideo playback profiles

Popped my head out of the hole and noticed that I didn't add the matching change to FFmpeg. A couple of VDPAU fixes pushed to master and 31.

Try updating again:)
by mark_k
Mon Jun 22, 2020 6:06 pm
Forum: Troubleshooting
Topic: MythVideo playback profiles
Replies: 31
Views: 1722
Great Britain

Re: MythVideo playback profiles

Yes - sorry - didn't check the commit id:(

Have finally spotted my error - somewhere along the line I confused baseline and constrained baseline, so have pushed a change that allows both if main is supported.

If that doesn't work, I'll find a hole to crawl in to:)
by mark_k
Mon Jun 22, 2020 9:36 am
Forum: Troubleshooting
Topic: MythVideo playback profiles
Replies: 31
Views: 1722
Great Britain

Re: MythVideo playback profiles

Could you just sanity check for me that there is not a newer package version? The build/date time looks a little close to the commit and I know the ubuntu package builder was broken for a few days at least (and was fixed yesterday).

Thanks and regards
Mark