Mailing List Archive: V34 mythfrontend more jitter than a few updates ago

V34 mythfrontend more jitter than a few updates ago

Jul 6, 2023, 8:04 AM

Post #1 of 3 (143 views)

I just did a fresh build of mythtv on a Raspberry Pi 4 4GB. I used the
AUR mythtv-git package modifying for aarch64 and Master. It runs okay but
unlike a build from a week or so ago the mythfrontend jitter is now around
+/- 0.55 to 0.66 vs.0.03 to 0.22 with previous versions. It is noticeable.

In the past v34 (master) was better than v33 by a little bit on the RPI4.
But something has changed.

I always use mythfrontend settings to use OpenGL with 4 in the Max CPU
field with low quality in both Deinterlacer quality fields. I tested with
the V4L2 settings but they were identical to OpenGL which in the past were
worse than OpenGL.

Jim A

Re: V34 mythfrontend more jitter than a few updates ago [ In reply to ]

jfabernathy at gmail

Jul 6, 2023, 12:35 PM

Post #2 of 3 (142 views)

Permalink

On Thu, Jul 6, 2023 at 11:04?AM James Abernathy <jfabernathy@gmail.com>
wrote:

> I just did a fresh build of mythtv on a Raspberry Pi 4 4GB. I used the
> AUR mythtv-git package modifying for aarch64 and Master. It runs okay but
> unlike a build from a week or so ago the mythfrontend jitter is now around
> +/- 0.55 to 0.66 vs.0.03 to 0.22 with previous versions. It is noticeable.
>
> In the past v34 (master) was better than v33 by a little bit on the RPI4.
> But something has changed.
>
> I always use mythfrontend settings to use OpenGL with 4 in the Max CPU
> field with low quality in both Deinterlacer quality fields. I tested with
> the V4L2 settings but they were identical to OpenGL which in the past were
> worse than OpenGL.
>
> Jim A
>

This can be marked up to the mysteries of life. After a lot of testing to
confirm the bad results I shutdown the RPI4 and replaced the SSD with one
from a few days ago. It was better results; back to what I expected. I
confirmed that it was indeed the same version of mythtv and the same
kernel. So I replaced the SSD with the one giving me problems. I booted and
reconfirmed the kernel and mythtv versions and the mythfrontend settings.
This time the jitter was back to the expected level.

So never mind.

Jim A

Re: V34 mythfrontend more jitter than a few updates ago [ In reply to ]

jam at tigger

Jul 6, 2023, 3:22 PM

Post #3 of 3 (142 views)

Permalink

> On 7 Jul 2023, at 3:35 am, James Abernathy <jfabernathy@gmail.com> wrote:
>
>
>
> On Thu, Jul 6, 2023 at 11:04?AM James Abernathy <jfabernathy@gmail.com <mailto:jfabernathy@gmail.com>> wrote:
> I just did a fresh build of mythtv on a Raspberry Pi 4 4GB. I used the AUR mythtv-git package modifying for aarch64 and Master. It runs okay but unlike a build from a week or so ago the mythfrontend jitter is now around +/- 0.55 to 0.66 vs.0.03 to 0.22 with previous versions. It is noticeable.
>
> In the past v34 (master) was better than v33 by a little bit on the RPI4. But something has changed.
>
> I always use mythfrontend settings to use OpenGL with 4 in the Max CPU field with low quality in both Deinterlacer quality fields. I tested with the V4L2 settings but they were identical to OpenGL which in the past were worse than OpenGL.
>
> Jim A
>
> This can be marked up to the mysteries of life. After a lot of testing to confirm the bad results I shutdown the RPI4 and replaced the SSD with one from a few days ago. It was better results; back to what I expected. I confirmed that it was indeed the same version of mythtv and the same kernel. So I replaced the SSD with the one giving me problems. I booted and reconfirmed the kernel and mythtv versions and the mythfrontend settings. This time the jitter was back to the expected level.
>
> So never mind.

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4976 <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4976>

james