[mythtv-users] Issues with playback of *.TS on mythtv33.1 and nvidia 535 series

[Simon Kranz]

Hello, thanks for your reply.

I assume your DVB-T and DVB-S2 recordings are also in TS format?  And
are h264 and 1920x1080?

Yes, I agree that I could use VDPAU (or std FFMPEG) for these, but I
seem to think there is something going on that is different and
possibly specific for my recordings (TS files) vs mp4 files.

Like i mentioned, TS files with mpeg2 (720x576 SDTV) are fine with
NVDEC but a TS file with h264 (1920x1080 FHD) is not fine with NVDEC
on driver 535.183 but is ok on 525.147 with NVDEC.

I might look to see if there is any other info i can dig out using mediainfo.

I wanted to stay with NVDEC as default as it handles HEVC whereas
VDPAU doesn't and i believe VDPAU is no longer developed.

Can any of the devs make any comments if anything has changed in the
code to play recordings in v34 which has changed since v33 or v32, or,
could there be anything different in the code to play recordings vs
playing videos?  I want hoping to narrow it down to pure driver issue
or not.

thanks,

On Fri, 7 Feb 2025 at 22:05, Stephen Worthington
<stephen_agent at jsw.gen.nz> wrote:
>
> On Fri, 7 Feb 2025 20:50:18 +1100, you wrote:
>
> >Hello all,
> >
> >I am running Debian 12 with mythtv 33.1 from DMO repository and a
> >nvidia GT1030 card.
> >I recently noticed that my playback has colour scrambled for TS files
> >with h264 and 1920x1080 recorded from FTA sources in Australia.
> >I use NVDEC decode and playback profile (NVDEC Normal).
> >I didn't recall this occurring a while back (this is my desktop so i
> >don't use mythfrontend all that often), so i checked my nvidia drivers
> >and it occurred to me that maybe I had updated my nvidia drivers and
> >this caused the issue?
> >
> >I saw that I now had nvidia 535.183 drivers.
> >
> >I did a bit more testing and i noticed that playback was fine for
> >720x576 Mpeg2 TS FTA recordings.  Also, h264 1920x1080 worked fine
> >from mythvideo playing a mp4 container file. So it seemed very
> >specific to TS h264 1920x1080 files.
> >
> >I checked my main frontend (different machine but same GT 1030 nvidia
> >card) and that has mythfrontend 32.0 (Debian 11) and nvidia drivers
> >470.141.  (Note that the main frontend didn't need a full update so i
> >just left it alone). This machine is fine with the same TS h264
> >1920x1080 files so i assume the newer drivers have caused something.
> >
> >Has anyone else experienced this?
> >I still had 525.147 in my apt cache locally so i downgraded to that
> >version and that fixed it!
> >
> >Any suggestions on how to troubleshoot and to try and dig into this
> >further as i would rather stay with latest nvidia drivers as i may not
> >have the old drivers available if i need to reinstall my desktop one
> >day.
> >
> >I realise this is not necessarily a mythtv issue, but that is software
> >where i am experiencing the playback issues so i thought i'd raise it.
> >
> >I'm also not necessarily ready to move to v34 as that's only available
> >on debian 12 backports and i thought i'd wait till debian 13 before
> >moving to v34.
> >
> >thanks,
> >Simon
>
> I am using Ubuntu 24.04.1, Nvidia GT1030 and GTX 1050 Ti with the
> 535.183 drivers, but I have not seen your particular problem here in
> New Zealand.  You could try VDPAU instead of NVDEC.  There are
> definitely some things that VDPAU does better than NVDEC, and vice
> versus.  I have had to swap between them to get some downloaded video
> files to play properly.  TV recordings here from DVB-T and Sky
> satellite DVB-S2 work fine with either.
>
> There is a bug in drivers > 535 that has meant I have kept using
> 535.183, even though there are versions up to 565 now.  I can not
> quite remember what it is, but every time a new version is released
> and I try it, I see the bug again and revert back to 535.183.
>
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