[mythtv-users] MythTV Light installation

Sun Oct 7 16:04:01 UTC 2018

> On Oct 7, 2018, at 7:24 AM, Jim Abernathy <jfabernathy at gmail.com> wrote:
> 
> 
> 
> On 10/06/2018 06:45 PM, Jerry wrote:
>> On Sat, Oct 6, 2018 at 6:37 PM James Abernathy <jfabernathy at gmail.com <mailto:jfabernathy at gmail.com>> wrote:
>>> 
>>> On 10/06/2018 03:16 PM, Jerry wrote:
>>>> On Sat, Oct 6, 2018 at 2:48 PM James Abernathy <jfabernathy at gmail.com <mailto:jfabernathy at gmail.com>> wrote:
>>>> So I now have my RP3+ and I used Etcher to install the RP Stretcher from 2017-11-29.  However when I turn on the RP3+, I just get the multicolor screen and the board has a blinking Green LED in some pattern.
>>>> 
>>>> Did I miss a step?  I just downloaded the .zip file for Stretcher, Flashed the microSD with Etcher, and plugged it in.
>>>> 
>>>> 
>>>> That sounds like a kernel problem.  I know that the 3B+ needs a newer kernel.  I don't think that was reflected in Raspbian until at least the RPi 3B+ release date of 3/14/18.
>>>> 
>>>> There may be a way for you to only upgrade the kernel by chrooting into that distribution from another Raspberry Pi, perhaps by installing current Raspbian on another card and mounting the target 11/29/17 Raspbian card with a USB reader.
>>>> 
>>>> It's a pain but I bet that will work.  I've done similar things with other single board computers.  The end will be 11/29/17 with an upgraded kernel.  Which version to pick is another story.  Perhaps the latest one, perhaps not.  You could try the oldest kernel made after 3/14/18 I suppose.
>>>> 
>>>> You might have to grab the actual .deb file and upgrade it manually with dpkg -i.  I'm not very familiar with Debian-based distributions.  Perhaps there is a limited upgrade apt command that will do it.
>>>> 
>>>> Good luck.  If you get stuck I can do it in parallel here.  I have spare microSD cards and a RPi3B+.
>>> 
>>> So I downloaded the latest Raspbian for RP3+ (2018-06-27-raspbian-stretch.zip) and used Etcher to flash it to a 32GB microSD and this one booted fine.  I'm going to try and get MythTV Lite running on it like I didn't know any better and see what happens.
>>> 
>>> Jim A
>>> 
>> 
>> Well this is interesting.  Mythtv light works okay on the Raspbian  2018-06-27 and I did a full update.  Then I install Mythtv Light.  I didn’t try much performance tuning yet, but it seems to work fine. I’m using HDMI video to a A/V receiver and the receiver sends the audio to 5.1 speakers and video to my UHD TV. Setting audio to OpenMAX:hdmi and Video Playback profile to OpenMAX Normal.  
>> 
>> I can see some performance issues, but I still have to play with tuning.
>> 
>> I did get my Harmony Smart Hub remote paired to the bluetooth on the RP3+. No issues there.
>> 
>> I’ve bought a MPEG2 license but I don’t have the code yet.
>> 
>> More later after I’ve had time to tune.
>> 
>> 
>> Good.  Chroot is a pain.  But doable.
>> 
>> It looks like the firmware in the older image is the culprit and not the kernel as I thought:
>> 
>> https://github.com/Debian/raspi3-image-spec/issues/12 <https://github.com/Debian/raspi3-image-spec/issues/12> 
>> 
>> All I know is, there was a Raspbian image that was released before 3/14/18.  I tried it on my 3+ and it didn't work, blinked like you said.  2 days later, the fix was out.  It was a hot topic on the forums at the time.  I just had to do a full upgrade with an older Rpi 2 and then it booted.
>> 
>> If you have problems, and it sounds like you don't have any glaring ones, my offer still stands.  I can try going through in the next day or so and give you the steps.  It won't take me long.
>> 
> 
> I did a little more playing late last night. On a fully updated 2018-06-27-raspbian-stretch.zip on my new Canakit RP3+ using a Samsung 32GB EVO Plus Class 10 Micro SDHC I added the repo for Mythtv light for stretch version 29. Then I basically followed the wiki guide:
> 1. Configure gpu_mem=256 using sudo raspi-config
> 2. I bought and configured a MPEG2 license.
> 3. I selected OpenMAX Normal and OpenMAX:hdmi
> 4. I do the 
> echo "performance" |sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> 
> at reboot.
> 
> What is the best way to automate the echo "performance" command on each boot?
> 
> The only strange thing I see is with playing back recorded mpeg2 TV shows. The video seems to occasionally speed up and slow down like when a person is walking across the screen.  It's like then the sport replay guy is messing with the speed of replaying a touchdown run.
> The audio does not sound different and there is no pitch change. It's also is correct lip sync.
> 
> I also installed Kodi 17.6. I works very well with no playback audio or video issues.  But I hate the user interface of Kodi 17, so I'm hoping to tweak Mythtv Frontend to fix the last few things.
> 
> So the latest Raspbian works on the latest RP3+ with Mythtv frontend.
> 
> Jim A
>  
> 

I have a question about the MPEG2 license.  I put the “decode_MPG2=0x999999” code statement in my /boot/config.txt file.  After I rebooted I did the test statement “vcgencmd codec_enabled MPG2” which says “enabled”

I wanted to test with no MPG2 so I removed that decode_MPG2 statement in /boot/config.txt file, but after rebooting my "vcgencmd codec_enabled MPG2” command still returned “enabled”.  Is the MPEG2 codec turned on in the firmware permanently now????

Jim A

>> 
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org <mailto:mythtv-users at mythtv.org>
>> http://lists.mythtv.org/mailman/listinfo/mythtv-users <http://lists.mythtv.org/mailman/listinfo/mythtv-users>
>> http://wiki.mythtv.org/Mailing_List_etiquette <http://wiki.mythtv.org/Mailing_List_etiquette>
>> MythTV Forums: https://forum.mythtv.org <https://forum.mythtv.org/>
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20181007/393017c8/attachment.html>