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List: mythtv-users
Subject: Re: [mythtv-users] Troubleshooting video problems on my combined FE/BE
From: Jerry <mythtv () hambone ! e4ward ! com>
Date: 2015-05-31 16:29:26
Message-ID: CAO_Sck44WK=_wuqzyVtG58cicgeFp-MKgjisLBgJ_2aq1oKO+w () mail ! gmail ! com
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On Mon, Mar 16, 2015 at 6:45 AM, Michael T. Dean <mtdean@thirdcontact.com>
wrote:
> On 03/13/2015 11:41 AM, Mike Perkins wrote:
>
>> On 13/03/15 15:22, Hika van den Hoven wrote:
>>
>>> Friday, March 13, 2015, 4:10:44 PM, you wrote:
>>>
>>>> On Thu, Mar 12, 2015 at 4:29 PM, Mark Perkins wrote:
>>>>
>>>>>
>>>>> I'm finding that constant swapping between progressive and
>>>>> interlaced very
>>>>> odd. Do you get those messages on the non-stuttering frontend? Does
>>>>> the
>>>>> recording play stutter free on the main frontend if you use another
>>>>> player
>>>>> like VLC? What does mediainfo say about the file?
>>>>>
>>>>> It is not uncommon for the format to change at commercial breaks
>>>>> and the
>>>>> like but the messages above seem to indicate it is changing every few
>>>>> seconds and sometimes every few frames!
>>>>>
>>>>> I began writing this email about two hours ago with all of my efforts.
>>>> Basically, when I hooked up my FE/BE to my analog KVM and then
>>>> directly to
>>>> my usual computer monitor, the stuttering went away in all programs I
>>>> tried. I was getting stuttering in Kodi, Plex Home Theater, Myth
>>>> videos,
>>>> I'm sure everywhere else, too.
>>>> I finally started looking at settings on the TV. I wound up
>>>> changing the
>>>> Game Mode setting to On. The TV says there is a reduction in image
>>>> quality, but I can't see it. The stuttering seems to have gone
>>>> away. I
>>>> can't find it now, so I am satisfied.
>>>> So if you have a Samsung later model TV and you experience
>>>> stuttering, try
>>>> setting Game Mode to On.
>>>> Should I put this in the wiki somewhere?
>>>> Thanks to Mark and Hika for the help!
>>>>
>>>
>>> It sounds logical, gaming needs faster response.
>>> As far as I can think, the only thing that could get changed this way
>>> is your resolution and possibly the refresh rate. I guess it now sends
>>> other edid info to the computer.
>>>
>>> In theory it should also eliminate overscan, which is a feature that
>> belongs in the analog age.
>>
>> When your incoming signal is a known 720 or 1280 digital signal, and
>> the tv is flat-screen digital with individual pixel addressing, why on
>> Earth did anybody think overscan was a good idea?
>>
>>
> On Samsung TVs, setting Game mode eliminates the TV's processing of the
> signal--so you get exactly the output that X/MythTV gives without your
> TV screwing it up (to "make it better"). The processing goes quite a
> bit farther than just overscan, so it's a very noticeable difference.
> As a matter of fact, if you're sensitive to sync issues and you're using
> something other than the TV speakers for audio output, you may even see
> an A/V sync difference because of all the time the TV spends processing
> the video before displaying it.
Today, I addressed this again because of the differences in picture quality
with regular mode vs. game mode. I dug up the manual and I looked at the
options in Menu -> Picture -> Picture Options. I had to change the picture
mode from Dynamic to Standard to enable all options.
I didn't have to disable everything entirely. I am still trying to get the
levels that I want, but I initially set MPEG Noise Filter, Digital Clean
View and HDMI Black Level to Low and Auto Motion Plus to Smooth. This does
show a good improvement over what I was seeing with Game mode enabled. I
may not have everything set to the ideal values but I was able to watch
some recordings without the speeding up, slowing down and slight stutters I
had with the television's default settings.
If you have a Samsung TV (mine is from 2014) and you have a similar
experience, check out the Picture Options to see if you can fix your issues.
Thanks,
Jerry
[Attachment #5 (text/html)]
<div dir="ltr">On Mon, Mar 16, 2015 at 6:45 AM, Michael T. Dean <span \
dir="ltr"><<a href="mailto:mtdean@thirdcontact.com" \
target="_blank">mtdean@thirdcontact.com</a>></span> wrote:<br><div \
class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" \
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span \
class="">On 03/13/2015 11:41 AM, Mike Perkins wrote:<br> </span><blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><span class=""> On 13/03/15 15:22, Hika van den Hoven \
wrote:<br> </span><blockquote class="gmail_quote" style="margin:0 0 0 \
.8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""> Friday, March 13, \
2015, 4:10:44 PM, you wrote:<br> </span><div><div class="h5"><blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"> On Thu, Mar 12, 2015 at 4:29 PM, Mark Perkins wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"> <br>
I'm finding that constant swapping between progressive and<br>
interlaced very<br>
odd. Do you get those messages on the non-stuttering frontend? Does<br>
the<br>
recording play stutter free on the main frontend if you use another<br>
player<br>
like VLC? What does mediainfo say about the file?<br>
<br>
It is not uncommon for the format to change at commercial breaks<br>
and the<br>
like but the messages above seem to indicate it is changing every few<br>
seconds and sometimes every few frames!<br>
<br>
</blockquote>
I began writing this email about two hours ago with all of my efforts.<br>
Basically, when I hooked up my FE/BE to my analog KVM and then<br>
directly to<br>
my usual computer monitor, the stuttering went away in all programs I<br>
tried. I was getting stuttering in Kodi, Plex Home Theater, Myth<br>
videos,<br>
I'm sure everywhere else, too.<br>
I finally started looking at settings on the TV. I wound up<br>
changing the<br>
Game Mode setting to On. The TV says there is a reduction in image<br>
quality, but I can't see it. The stuttering seems to have gone<br>
away. I<br>
can't find it now, so I am satisfied.<br>
So if you have a Samsung later model TV and you experience<br>
stuttering, try<br>
setting Game Mode to On.<br>
Should I put this in the wiki somewhere?<br>
Thanks to Mark and Hika for the help!<br>
</blockquote>
<br></div></div><span class="">
It sounds logical, gaming needs faster response.<br>
As far as I can think, the only thing that could get changed this way<br>
is your resolution and possibly the refresh rate. I guess it now sends<br>
other edid info to the computer.<br>
<br>
</span></blockquote><span class="">
In theory it should also eliminate overscan, which is a feature that<br>
belongs in the analog age.<br>
<br>
When your incoming signal is a known 720 or 1280 digital signal, and<br>
the tv is flat-screen digital with individual pixel addressing, why on<br>
Earth did anybody think overscan was a good idea?<br>
<br>
</span></blockquote>
<br>
On Samsung TVs, setting Game mode eliminates the TV's processing of the<br>
signal--so you get exactly the output that X/MythTV gives without your<br>
TV screwing it up (to "make it better"). The processing goes quite a<br>
bit farther than just overscan, so it's a very noticeable difference.<br>
As a matter of fact, if you're sensitive to sync issues and you're using<br>
something other than the TV speakers for audio output, you may even see<br>
an A/V sync difference because of all the time the TV spends processing<br>
the video before displaying it.</blockquote><div><br></div><div>Today, I addressed \
this again because of the differences in picture quality with regular mode vs. game \
mode. I dug up the manual and I looked at the options in Menu -> Picture -> \
Picture Options. I had to change the picture mode from Dynamic to Standard to \
enable all options.<br><br></div><div>I didn't have to disable everything \
entirely. I am still trying to get the levels that I want, but I initially set MPEG \
Noise Filter, Digital Clean View and HDMI Black Level to Low and Auto Motion Plus to \
Smooth. This does show a good improvement over what I was seeing with Game mode \
enabled. I may not have everything set to the ideal values but I was able to watch \
some recordings without the speeding up, slowing down and slight stutters I had with \
the television's default settings.<br><br></div><div>If you have a Samsung TV \
(mine is from 2014) and you have a similar experience, check out the Picture Options \
to see if you can fix your \
issues.<br><br></div><div>Thanks,<br></div><div>Jerry<br></div></div></div></div>
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