Striped picture when there is movement

Liam Farrell

Hello,

I've recently started using TvHeadend with a PCTV 292e. I seem to have come across an issue that when there is movement on the stream or recording the picture has stripes across it. I have TvHeadend and the PCTV device plugged into a Raspberry Pi 2 running raspbian 3.18.10-v7+ with tvheadend 3.9.2674. This occurs with both HD and SD streams, I have also tried using all three stream profiles (htsp, Matroska and pass) and the issue still occurs. When the streams are running the CPU is minimal. I have a feeling that it is likely to be the driver for the tuner as it took a lot of work to get it working.

If anyone has seen similar issues or could help try and diagnose the issue I would be grateful.

I've attached a screenshot of how the picture looks.

Thanks

Liam

ProfYaffle

Looks like interlacing to me. Play with the deinterlacing settings, including the mode - better deinterlacing needs more CPU grunt, so that may be a problem on a Pi, but perhaps the Pi2 is up to it.

You could always run a sample through Handbrake and force the frame interpolation there so it become a progressive image, and then test that if you want to see proof. But odds on it's because it's not deinterlacing, or not doing it properly.

EDIT

Quick recording from BBC ONE HD on Freeview, PCTV290e (so your stick's predecessor).

Playback through VLC - with no deinterlacing:

http://s22.postimg.org/4lx0bi91d/interlace_1.png

With deinterlacing set to 'auto', mode = 'Bob'

http://s28.postimg.org/e1vg5qezx/interlace_2.png

Liam Farrell

Hi,

I've just tried streaming with VLC and with deinterlacing set to auto and the issue is fixed. Thanks for this, I thought this may have been something with the server rather than the client.