MythTV Official Community Forum

Just a heads up for anyone having DVD issues with .31 whilst using VAAPI and/or VDPAU.

A fix went in yesterday - so please update and report back if there are still issues.

Thanks and regards
Mark

Have you tried setting the display 'setting'? (Setup->Appearance->Theme/Screen settings->Display on Screen) If that doesn't help, please post the full output from 'mythfrontend -v playback --loglevel=debug' from startup to trying to play a video. The screen code had a bit of an update/fix for versio...

.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

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 ...

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...

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

@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...

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...

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...

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...

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...

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 ...

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

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...

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:)