<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Feb 4, 2024, at 3:54 PM, James Abernathy <jfabernathy@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Feb 4, 2024 at 11:08 AM Jay Harbeston <<a href="mailto:jharbestonus@gmail.com">jharbestonus@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
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> On Feb 4, 2024, at 9:06 AM, James Abernathy <<a href="mailto:jfabernathy@gmail.com" target="_blank">jfabernathy@gmail.com</a>> wrote:<br>
> <br>
> I don't normally use a PC as a frontend. However, today I was on my NUC which is running Linux Mint Debian Edition 6. I'm using the mythfrontend on V34 Master that I built the packages for this morning following the Wiki. The NUC PC is an Asrock NUC 1165G7 which uses an Intel 11th gen Core i7 CPU.<br>
> <br>
> I noticed a lot of jitters playing a recording that was 1080i ATSC 1.0 MPEG2. I tried both Opengl High quality and VAAPI with the normal settings I've used in the past. Too jumpy a picture to watch this way. I originally viewed the recording using Leanfront on a FireTV 4K Max. <br>
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When it was jumpy, did you try using the menu->playback -> info to see what decoder was being used, and the load on the cpu? <br>
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I suspicion that for whatever reason the accelerated video method isn’t getting used. Or the settings for de-interlacing are wrong somehow.<br>
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Regards!<br>
<br></blockquote><div><br></div><div>Thanks, I have more data, but first to your questions. </div><div><br></div><div>When in OpenGL High Quality, the playback data shows the Codec/dec as MPEG2 ffmpeg with Deint as 2x GLSL Kernel</div><div>when in VAAPI either Decode only or normal, Codec/dec is MPEG-2 VAAPI-dec with deint as 2x VAAPI compensated.</div><div><br></div><div>Same jitter in both.</div><div><br></div><div>So I went looking for issues with the system in general. vlc has the same jitter playing the file. Kodi is cleaner but not as good as my FireTV 4K with leanfront.</div><div><br></div><div>I've been running LDME6 in default X11 mode on a 4K UHD display in 4K with a 200% scaling factor. That works well except for mythtvfrontend and gives me the option to play 4K content when available outside of mythtv recordings which are only HD. </div><div><br></div><div>If I change the resolution to 1920x1080, it picks 120Hz and that works well and mythfrontend is better on OpenGL.</div><div><br></div><div>vlc is now better matching mythfrontend quality. Same as Kodi now. All of these are usable.<br></div><div><br></div><div>So maybe the scaling is the problem. Maybe X11 or Cinnamon DE with 200% scaling is a little past the limits of my NUC?</div><div><br></div><div>Since my normal viewing of mythtv recordings on this UHD TV is with a FireTV 4K Max and Leanfront app, this mythfrontend on the NUC issue is not a huge problem. More of a curiosity. Not sure I really need the PC in 4K mode since I sit >10ft from the screen. So I'll try switching to 1080P resolution instead of 200% scaling of the default UHD resolution.</div><div><br></div><div>I tested this on an AMD desktop with a 8 core Ryzen with builtin gfx and that had no issues, but it's a faster CPU and good gfx and the monitors are only 1080p.</div></div></div></div></blockquote><br></div><div>The machines that I have been using are able to display on a 4k monitor/TV however, I have not had good success with full screen tv from mythtv when using 4k upscaling. I have always dropped the tv back to 1080p mode 60hz and have had good luck with them then. All the content I have is either BluRay 1080p, or standard atsc resolutions so running the tv in 4k doesn’t matter as far as the display. The machines I use have been either intel N95/N100 or N5095/N5195 machines, and playback using VAAPI/VAAPI2 profile on all of them. </div><div><br></div><div>I see you have been ’toying’ with the ATSC 3 in the past. Has there been any 4K content on ATSC3 in your area? Are you able to record from ATSC3 using mythtv either 1080p/I or 4k?</div><div><br></div><div>Regards!</div><div><br></div><br></body></html>