I can confirm that mpv 0.40.0 which is standard in Debian Trixie does a lot of frame-dropping. Not only on my DVB-T2 recordings (1080p50 HEVC) but also on the test vid. This is on Intel x5-Z8350 device. Not on Intel N100. Have not tried on any Arm. There are various other issues with this release of mpv, like that on my DVB-T2 recordings, the HW decoder fails (both Z8350 and N100) on some POC (long sequence or issues) and then switches to SW decoding. An N100 with Gbit ethernet is fast enough that you don't notice, but Z8350 or BCM2711 cannot keep up, so you see dropped frames, but other reason. I do not have a BCM2712, so cannot really see what is happening there.
On the Z8350, when I do
mpv --vo=gpu --gpu-api=opengl --gpu-dumb-mode=yes --hwdec=vaapi Test\ Jellyfin\ 1080p\ HEVC\ 8bit\ 3M.mp4
no dropped frames anymore except just a few at startup of the command.
With just the options --vo=gpu --hwdec=vaapi, many frame drops, like the topic title is about and also clearly visible. It is so annoying that vlc with its complicated keybindings becomes a workaround.
At least mpv v0.40.0+git20251010.67330ba2de (using that on current opensuse tumbleweed on N100) does not fail on HW decoding for a live recording from TV-HAT.
If I just copy only the video + 1 audio stream with ffmpeg out of the .ts file to some other .ts file, Debian Trixie mpv keeps using HW decoding. But as indicated, this is another issue, might be the TVH on RPi4+TH-HAT that is the root-cause.
On the Z8350, when I do
mpv --vo=gpu --gpu-api=opengl --gpu-dumb-mode=yes --hwdec=vaapi Test\ Jellyfin\ 1080p\ HEVC\ 8bit\ 3M.mp4
no dropped frames anymore except just a few at startup of the command.
With just the options --vo=gpu --hwdec=vaapi, many frame drops, like the topic title is about and also clearly visible. It is so annoying that vlc with its complicated keybindings becomes a workaround.
At least mpv v0.40.0+git20251010.67330ba2de (using that on current opensuse tumbleweed on N100) does not fail on HW decoding for a live recording from TV-HAT.
If I just copy only the video + 1 audio stream with ffmpeg out of the .ts file to some other .ts file, Debian Trixie mpv keeps using HW decoding. But as indicated, this is another issue, might be the TVH on RPi4+TH-HAT that is the root-cause.
Statistics: Posted by redvli — Wed Nov 26, 2025 10:15 am