jibri: fix xorg modeline for 1280x720 (#1778)

* jibri: fix xorg modeline for 1280x720

* whitespace

jibri.yml

@@ -38,6 +38,8 @@ services:
             - JIBRI_USAGE_TIMEOUT
             - JIBRI_XMPP_USER
             - JIBRI_XMPP_PASSWORD
+            - JIBRI_XORG_HORIZ_SYNC
+            - JIBRI_XORG_VERT_REFRESH
             - JIBRI_BREWERY_MUC
             - JIBRI_RECORDER_USER
             - JIBRI_RECORDER_PASSWORD

jibri/rootfs/defaults/xorg-video-dummy.conf

@@ -1,4 +1,6 @@
 {{ $JIBRI_RECORDING_RESOLUTION := .Env.JIBRI_RECORDING_RESOLUTION | default "1280x720" -}}
+{{ $JIBRI_HORIZ_SYNC := .Env.JIBRI_XORG_HORIZ_SYNC | default "43.0 - 47.0" -}}
+{{ $JIBRI_VERT_REFRESH := .Env.JIBRI_XORG_VERT_REFRESH | default "58.0 - 62.0" -}}
 
 # This xorg configuration file is meant to be used by xpra
 # to start a dummy X11 server.
@@ -24,8 +26,8 @@ EndSection
 
 Section "Monitor"
   Identifier "dummy_monitor"
-  HorizSync   5.0 - 1000.0
-  VertRefresh 5.0 - 200.0
+  HorizSync   {{ $JIBRI_HORIZ_SYNC }}
+  VertRefresh {{ $JIBRI_VERT_REFRESH }}
   #This can be used to get a specific DPI, but only for the default resolution:
   #DisplaySize 508 317
   #NOTE: the highest modes will not work without increasing the VideoRam
@@ -63,6 +65,7 @@ Section "Monitor"
   Modeline "1360x768" 24.49 1360 1392 1480 1512 768 786 789 807
   Modeline "1024x768" 18.71 1024 1056 1120 1152 768 786 789 807
   Modeline "768x1024" 19.50 768 800 872 904 1024 1048 1052 1076
+  Modeline "1280x720@60" 73.78 1280 1312 1592 1624 720 735 742 757
 
 
   #common resolutions for android devices (both orientations):