[mythtv-users] H.264 Problem not present in H.265

[Ken Mandelberg]

I have 4 frontends running the most up to date trunk release. 3 are are 
on Ubuntu 20.04 (I build it), and the 4th is Peter Bennett's Android 
build v32 build running on a Chromebook.

On two of the frontends H.264 and H.265 media both work perfectly. On 
the other two H.265 works perfectly, but H.264 doesn't. This is a 
problem since my backend is via Comcast/HDHomerun which is all H.264.

The H.264 working frontends are

NUC (backend/frontend) Celeron(R) J4005 @2.00GHz i915 graphics driver

HP Z230 workstation (frontend) i7-4770 CPU @ 3.40GHz Nvidia Quadro K620

The two where H.265 is fine, but H.264 is not are

MacBookPro4,1 (frontend) (running Ubuntu 20.04) Intel Core 2 T9300  @ 
2.50GHz Nvidia Geforce 8600M

Dell Inspiron Chromebook 11 1.6GHz Intel Celeron N3060 Intel HD400 Graphics

   these two either never get past a blank screen, or do a frame every 
few seconds, or run out of video buffers.

Changing the Profiles doesn't change anything.

The Macbook until several months ago had no issue, but I wasn't keeping 
track of the media format then, and since I've built newer versions of 
myth as well. It could be Comcast change or a software change, or even 
the Nvidia driver.

The Chromebook never was able to do H.264

On the 3 Linux machines H.264 works fine with mplayer,  on the 
Chromebook it works well enough with various apps.

Any help on why H.264 is a problem and H.265 is not.