I set up a Pi3 B+ by doing the following:
create sd card from 2020-02-13-raspbian-buster-full.zip
On boot partition: type nul > ssh
don't set up wifi, don't update OS, don't reboot
change hostname to frontend1 (or rr)
memory split to 128
echo "deb h t t p://d l . b i n t r a y . c o m /bennettpeter/deb/ buster myth30" >> /etc/apt/sources.list
wget -O - h t t p s : / / b i n t r a y .c o m /user/downloadSubjectPublicKey?username=bintray | apt-key add -
apt update ; apt -y upgrade ; apt install -y mythtv-light mythplugins-light telnet nmon
Start mythfrontend, Search for backend, select v30 one, restart mythfrontend
audio -> output device -> ALSA:default:CARD=ALSA
audio -> master mixer volume -> 100
audio -> pcm mixer volume -> 100
audio -> upconvert stereo to 5.1 surround -> off
video -> playback -> current video playback profile -> openmax normal
The dropouts vary but generally last a second or less. I hear the dropout no later than 30 seconds into the recording but the first dropout varies as to when it starts.
I run nmon while playback is occuring and I see that no resource I'm monitoring (disk, network, cpu) is anywhere close to maxing out. CPU is at about 25% usage, Network is at about 1.8MBytes/sec inbound, disk usage is pretty much non-existent.
- With a hardware decoding license and without without about the same results.
- I tried all "found" audio output devices (hw, plughw, etc), some don't work at all, others have the same problem listed above.
- Using -v playback and while the logs show a few "Waiting for video buffers...", introducing the playback log seems to introduce video lag which could explain the video buffers.
- Using v31 and couldn't get the RPi4 FE/BE combo to play HD video without video and audio stuttering, hence the reason why I'm asking about v30.