tldr; Live TV displays, heavy frame dropping and occasional blanks. Audio from headphones is "low" (e.g. playing slow) and crackly and only out of one channel.
Excited to have just discovered VDR and then this project shortly after. Originally I thought it was rpi3 only (because stable does not include rpi4 yet). I got everything set up on rpi3 just to realize I need the mpeg2 license to play my ATSC (United States) channels. Shortly after I looked at the testing channel and saw a rpi4 option and happy to help with the testing process!
Burned and installed (only VDR) from SD card: `dd if=MLD-5.5_netinstall_2021.09.25-182.2+1617_armhf-rpi4.img bs=1M of=/dev/sdi`
Ran w_scan to generate the channels file in /etc/vdr/channels/ (thanks for including w-scan in in the package repository)
I had to switch sound settings to get vdr to start due to an error (because my monitor doesn't offer an audio channel?)
```
AlsaOpenPCM: playback open 'plug:iec958' error: No such file or directory
```
Live TV displays now, but heavy frame dropping and occasional blanks. Audio from headphones is "low" (e.g. playing slow) and crackly and only out of one channel.
From my previous experience, my hypothesis is there is an audio issue causing this behavior. Any debugging guidance is appreciated.
Possibly useful information: Recordings in `/data/tv/` are good and play without issue with VLC on desktop. Download speeds were not great (6-8MB/sec) but may be SD card limited?
MLD> uptime
16:52:40 up 28 min, load average: 4.63, 3.85, 2.94
I have heat sinks and a fan
MLD> vcgencmd measure_temp
temp=48.2'C
MLD> free
total used free shared buffers cached
Mem: 1666912 1587268 79644 588 2076 1297956
-/+ buffers/cache: 287236 1379676
Swap: 0 0 0
MLD> tvservice -s
state 0x120009 [HDMI CEA (16) RGB lim 4:3], 1920x1080 @ 60.00Hz, progressive