Mailing List Archive

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "MythTV Frontend_010.png" added.

Wrong aspect ratio of video in window

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by jpilk):

I had aspect ratio problems too, but c535f96 and b2a0e82 work for me; I'm
using my longstanding --geometry overrides, though, which may be thought
undesirable.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:1>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "configure_20200106.log" added.

Log of the ./configure of the configuration that produces the video aspect
ratio issue.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "mf-20200106-2220.log" added.

Log of mythfrontend playing video fragment first with VAAPI and then with
OpenGL High Quality, both showing the video aspect ratio issue.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: accepted
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by mark-kendall):

* status: assigned => accepted


--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:2>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by mark-kendall):

* status: accepted => infoneeded


Comment:

Klaas

Can you confirm a few things:-

- per the email discussion, are you running wayland?
- what is the actual aspect ratio of your monitor? 16:9 or 16:10?

Can you also attach

- the full log using '-v playback' logging.
- the full output from 'xrandr --verbose'
- the EDID itself.

For the EDID, I think it should be as easy as:-

cat /sys/class/drm/card0-HDMI-A-2/edid > monitor.edid

Though you may need to check that HDMI-A-2 is the correct device.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:3>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by mark-kendall):

Can you also confirm what is shown in the "Virtual monitor aspect ratio"
field of the appearance settings page. Thanks

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:4>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by Klaas de Waal):

About Wayland or X11, my understanding is that I run X11, as indicated by
the following:
{{{
[klaas@modu mythtv]$ loginctl
SESSION UID USER SEAT TTY
6 1000 klaas seat0 tty1

1 sessions listed.
[klaas@modu mythtv]$ loginctl show-session 6 -p Type
Type=x11
[klaas@modu mythtv]$

}}}

{{{
[klaas@modu mythtv]$ echo $XDG_SESSION_TYPE
x11
[klaas@modu mythtv]$
}}}

About monitor aspect ratio.
Main monitor is 16:10, second monitor is 16:9. Arranged side-by-side.
When only the main monitor (16:10) is connected the problem is the same.

About the "Virtual monitor aspect ratio".
The setting is "Auto" but I have also tried "32:10 Side by side" and a few
others. This did not make any difference.

Logs are attached.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:5>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "mf-20200107-2134.log" added.

Log of mythfrontend with -v playback. Playing a SD recording in 1280x720
window on 1920x1200 screen.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "xrandr_verbose.log" added.

Output of xrandr --verbose

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "card0-HDMI-A-2_edid.bin" added.

EDID of main monitor, Samsung 1920x1200

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "card0-HDMI-A-3_edid.bin" added.

EDID of second monitor, HP 1920x1080

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: infoneeded
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* Attachment "mf-20200107-2153.log" added.

Log of mythfrontend with -v playback. Playing a SD recording in 1280x720
window on 1920x1080 screen. Aspect ratio is correct.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by Klaas de Waal):

* status: infoneeded => assigned


Comment:

Rebooted the system with only the HP 16:9 1920x1080 monitor connected. The
video aspect ratio is now correct! Log of mythfrontend -v playback is
attached. It looks like the problem is the 16:10 form factor of the
Samsung monitor.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:6>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by jpilk):

Running 1c97471de5f on my F30 box-with-nVidia I found it difficult to get
settings that properly nested the video into the GUI on both the monitor
and the TV.

Previously my default 'mythfrontend' setup has been a windowed display
1024x576+64+64 and I have used

'mythfrontend -nw -geometry 1920x1080+1680+0' to put it on the TV

Adding ' -display=HPFed:0.0' to both these command lines does what I want.

The name is as shown in the nVidia X Screen information, which also gives
dimensions of 3600x1080, ratio 10:3. Specifying ratios doesn't seem to
make an easily understood difference to what I see.

My usual problem with -help screens is knowing what format the writer
thought was obvious.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:7>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by Klaas de Waal):

The problem seems to be that the 16:10 monitor is considered to have a
size of 160mmx90mm which then leads to an incorrect Display Rect result:
{{{
2020-01-07 21:35:15.658760 I VideoWin: New display properties: 160mmx90mm
Aspect 1.3333
...
2020-01-07 21:35:15.658824 I VideoWin: Display Rect: 1159x720+60+0
Aspect: 1.96296
}}}
For the 1920x1080 16:9 monitor the dimensions are correct and the Display
Rect is also correct:
{{{
2020-01-07 21:54:01.621708 I VideoWin: New display properties:
480mmx270mm Aspect 1.3333
...
2020-01-07 21:54:01.621731 I VideoWin: Display Rect: 1280x720+0+0 Aspect:
1.77778
}}}

The problem would be solved if the screen dimensions are reported correct.
This does depend on correct values in the EDID and especially for older
TV's these values might be wrong.

However, as far as I know, all screens with a resolution of full-HD
(1920x1080) or higher do have square pixels. Also, it is unlikely to have
a screen of 160mmx90mm so if this is reported it should not be taken too
serious.

Note that also my 55-inch full-HD TV (Samsung, 2011) is reported to have a
size of 160mmx90mm.

It looks to me that the way forward can be:
- Obtain the correct display dimensions
- Discard 160mmx90mm results as they indicate that the real values are not
available
- For resolutions of full-HD or higher always use square pixels
- Add a warning message when the reported dimensions are corrected for
square pixels

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:8>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by mark-kendall):

> It looks to me that the way forward can be:
>
> Obtain the correct display dimensions


If the EDID is wrong, there is no other way of automatically detecting the
actual screen size. That is what the EDID is for.

> Discard 160mmx90mm results as they indicate that the real values are
not available

As mentioned previously, 160x90 is a common and useful result - it tells
us all we need to know (i.e. the aspect ratio). We don't actually care
about the size.

> For resolutions of full-HD or higher always use square pixels

I'd personally guarantee that this won't be accurate in a number of
scenarios.

The real issue here is whether this was working as expected before?

All it really needs is for the aspect ratio override setting to be
respected - I think in refactoring I assumed it was only needed/used for
'Xinerama' (i.e. multi-screen) setups.

The other potential solution is to override the EDID for that display.
I'll attach a modified EDID that indicates 160x100 which can then be used
with something like:-

https://unix.stackexchange.com/questions/295784/how-to-tell-intel-
graphics-to-use-my-custom-edid-file

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:9>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: needs_triage
Component: MythTV - General | Version: Unspecified
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by mark-kendall):

* Attachment "card0-HDMI-A-2_edid.2.bin" added.

Samsung EDID modified to report a display size of 160x100mm

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------
Changes (by mark-kendall):

* version: Unspecified => Master Head
* milestone: needs_triage => 31.0


--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:10>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by Klaas de Waal):

Thanks for the EDID. Using a custom EDID will solve it for me and there
are probably not that many 16:10 screens with an incorrect EDID.

About your question:
>The real issue here is whether this was working as expected before?
Yes, it has always worked as expected except for a short period as
described in ticket #13400.

For me the current behavior is a regression as it is not correct anymore
for a display with square pixels and wrong dimensions in the EDID. I do
however agree it is an improvement for screens with non-square pixels and
a correct EDID.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:11>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by mark-kendall):

Having thought it through - I'm pretty sure the old code got it 'correct'
by accident in your case. I noticed recently that the calls in
MythXDisplay::GetDisplayDimensions do not return the correct values when
multiple dislays are connected - which is why they are not used anymore
(we now use XRANDR - which will only be using the EDID anyway).

Anyway, I've started re-visiting the display aspect ratio settings - which
should clear things up a little. Just trying to work out the cleanest
approach.

So in your case, you should just be able to override the aspect ratio to
16:10 (rather than auto) (or override the EDID).

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:12>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by jpilk):

I just updated the old laptop, ubuntu bionic, to current master 627c03d.
No extra screens, default display in a window was slightly narrower than
the frame.

'mythbackend.real -v playback -display=LDVS1' appears to give a good fit.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:13>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by Klaas de Waal):

A setting like the "Virtual monitor aspect ratio" (which could then become
the "Monitor aspect ratio") would be perfect. In my case I have two
monitors with different aspect ratio's (although both with square
pixels...) so I think it should be possible to override each monitor
individually.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:14>
MythTV <http://www.mythtv.org>
MythTV Media Center

#13548: Video aspect ratio wrong with mythfrontend in window
----------------------------------+------------------------------
Reporter: Klaas de Waal | Owner: mark-kendall
Type: Bug Report - General | Status: assigned
Priority: minor | Milestone: 31.0
Component: MythTV - General | Version: Master Head
Severity: medium | Resolution:
Keywords: | Ticket locked: 0
----------------------------------+------------------------------

Comment (by mark-kendall):

Replying to [comment:13 jpilk]:
> I just updated the old laptop, ubuntu bionic, to current master 627c03d.
No extra screens, default display in a window was slightly narrower than
the frame.
>
> 'mythbackend.real -v playback -display=LDVS1' appears to give a good
fit.

John - if you have a problem, please open another ticket and clearly
explain what behaviour you are seeing, steps to reproduce and the
behaviour you expect to see - along with relevant logs etc. These comments
are not helpful.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13548#comment:15>
MythTV <http://www.mythtv.org>
MythTV Media Center