Hello, I’ve very specific problem with some HEVC streams from DVB-T2 in Czech republic.
The movements are - how to say - jagged, shaded, pixeladet edges, someting like partial “ghosts”.
I can provide a recording. I have following observations:
The problem occurs only on particular streams on one particular DVB-T2 multiplex (MUX24 in Czech republic). And not always.
It is not problem of a poor signal from antenna (perfect signal strength and quality)
If I record the affected stream, the problem occurs also while its playback on Vero and the artefacts are always the same
The recording is playable on PC (VLC player) without problem so stream is not “damaged”
When I connect to Vero’s TVheadend server from PC version of Kodi (as client) the problem doesn’t occur, so I think that there is no problem with DVB-T2 signal nor TVheadend
Similar problem is observable on my other TV box Tesla TEH-500 (Android, also with Amlogic chipset)
It seems like some postprocessing problem of videostream - maybe incorrect deinterlace etc.
Yes, I am from Czech rep too. The problem is occuring only in MUX24 (operated by Digital Broadcasting), but I remember that the problem was also in temporary MUX13 (operated also by Digital Broadcasting, very similar content). The problem occurs on almost all programs in this mux.
Other czech DVB-T2 muxes (operated by other operators) are not affected and are played perfectly by Vero.
The problem is not Vero4k specific, for me it occurs also on my Tesla TEH-500 Android box (also Amlogic chipset - so my opinion is that there is something non-standard in this mux that is not 100% compatible with Amlogic HW decoder). I haven’t seen this problem on cheap DVB-T2 set-top-box (unfortunatelly I don’t know what device it was).
No, it’s still the same (for MUX24 - we have already the final mux near Prague).
I am unable to set FEC low to NONE. And when I set the PLP ID to -1 the mux stops working at all (PLP ID must be set to 0 for me).
I still think that the problem is not in DVB-T2 receiver. If I connect to Vero’s TVHeadend from regular notebook PC (Windows + Kodi for windows or VLC), the TV programs are played correctly. So the DVB-T2 tuner is tuned properly).
I did not touch anything and tried that again. I was surprise that it was good (January update?). So I watched TV, then switched to another channel and after half minute switched back to problematic ones and it happend again. So sometimes it is OK, sometimes not. The true is, that after that I tried to switch channels back and forth and this no longer helped.
Hello, I’ve tried to turn the AMlogic HW acceleration on my Vero. The problem disappeared (on affected TV channels / recording). But the Vero has not enough CPU power for smooth playback of FullHD HEVC video (1920x1080) without HW acceleration. qHD (960x540) is OK. So I think that we have confirmed the hypothesis, that the problem is in somewhere in Amlogic HW accelerated decoding of HEVC video.
I think about some workaround - is there any possibility how to configure Kodi to use SW decoding on low-resolution (eg. 960x540) HEVC videos and use HW decoding on FullHD videos? Because the problem occurs only on MUX that is broadcasting only qHD streams. Maybe somewhere in advancedsettings.xml?
Edit: I’ve found that SW decoding would not be a solution because some qHD streams (possibly with higher bitrates) are not playable smoothly without HW acceleration