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

[Ken Mandelberg]

Peter Bennett wrote on 10/8/21 3:47 PM:
>
> On 10/8/21 3:24 PM, Ken Mandelberg wrote:
>>
>> 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
This one I solved. The symptom on this was about a frame a second. It 
turned out acceleration wasn't limited to decode, when I changed it to 
decode only the performance went back to what it used to be. I don't 
know what changed the setting.
>>
>> Dell Inspiron Chromebook 11 1.6GHz Intel Celeron N3060 Intel HD400 
>> Graphics
>>
On this one for H.264 the symptom was it never even displays any video, 
and generally runs out of video buffers eventually. This doesn't happen 
with H.265. It appears to be the acceleration again, but with this one I 
have to turn it off completely and go to "standard" for H.264 to run. 
Running only with software its too jumpy to be useful.

With H.265 it runs better but with trouble spots. Its not clear to me if 
its actually using the acceleration. The playback data doesn't really 
tell you, it only tells you the protocol and the decoder (ffmpeg) and 
not if ffmpeg is actually using the acceleration.

This is with Peter's android port running on the chromebook.

>>
> Did you try different playback profiles, or settings in the playback 
> profile?
>
> While playing, select playback data, which displays a box on screen 
> showing what method of playback is used, ffmpeg or some type of 
> acceleration. This could show if hardware acceleration is being used 
> for h265 but not for h264.
>
> Peter
>
>