[mythtv-users] New Rpi 4B - looks like it would make a great frontend

Peter Bennett pb.mythtv at gmail.com
Thu Jun 27 22:54:08 UTC 2019

On 6/27/19 4:47 PM, Stefan Davids wrote:
> On 27/06/2019 21:27, Jay Foster wrote:
>> On 6/27/2019 11:28 AM, Stefan Davids wrote:
>>> On 27/06/2019 17:11, Mike Bibbings wrote:
>>>> I have the 4GB RAM version of pi 4, so far it looks good.
>>>> The operating system changes from Raspbian Stretch to Buster, and 
>>>> is applicable to all Pi variants now.
>>>> It will do 4k @ 60Hz, but software support is limited at this time, 
>>>> and mythtv will probably need changes.
>>>> I have repackaged mythtv-light to run under Buster and tested on Pi 
>>>> 3 and Pi 4  1920x1080 @50Hz, it should also work on Pi 2 (not yet 
>>>> tested).
>>>> Anyone wanting to try please see 
>>>> https://forum.mythtv.org/viewtopic.php?f=46&t=3221
>>> Is the h265 decoding a possibility with mythtv or is that one of the 
>>> things that will require mythtv changes to get support for?
>> I don't know about the RPi, but regular MythTV added support for 
>> H.265 in version 0.28, at least for decode and playback.
> Yes but RPi3, for example, doesn't have hardware decoding for h265 and 
> doesn't have the CPU power to do software decoding and produce 
> watchable video.
> The reviews imply the new RPi4 can do hardware decoding of h265, so 
> I'm curious if anyone knows if mythtv can take advantage of that or if 
> this is one of the cases of current limited software support...
> Stefan

The existing code will use software decoding for H265, which may be too 
slow. A code change will be needed to set the appropriate OpenMAX 
decoder type for H265 on the raspberry pi4


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