2013-04-25, 21:19
I'm currently experiencing video corruption when watching H264 Live TV streams via TVHeadend, running a Alpha 3 Gotham build with the latest addon build, which manifests itself as the picture breaking up, most frequently when the scene has a lot of movement in it (e.g. sports) while the audio usually remains unaffected. This is on a Sandybridge i3 system running Ubuntu 13.04, although this problem was also present on 12.04. When the picture breaks up there is a corresponding drop in the fps on the codec info screen, usually to around ~18 fps.
It does not happen while watching local media, while streaming from the internet or watching back recordings of the same broadcasts which break up while watching them live. It is also not influenced by the choice of decoding method - using software or the Intel GPU via VAAPI makes no difference. What DOES make a difference is setting the TV to not change resolution with the video (I'm in the UK so TV is broadcast @ 25fps, so my TV switches from 60hz to 50hz), as the problem then goes away entirely.
I also have a windows PC with a stable Frodo build that does not have this problem when viewing live tv from the same source. Here is a debug log and a screenshot of the corruption in effect, does anyone have any ideas why this is happening specifically with live TV? Thanks.
http://pastebin.com/P1njXXxW
http://imgur.com/x059JCB
It does not happen while watching local media, while streaming from the internet or watching back recordings of the same broadcasts which break up while watching them live. It is also not influenced by the choice of decoding method - using software or the Intel GPU via VAAPI makes no difference. What DOES make a difference is setting the TV to not change resolution with the video (I'm in the UK so TV is broadcast @ 25fps, so my TV switches from 60hz to 50hz), as the problem then goes away entirely.
I also have a windows PC with a stable Frodo build that does not have this problem when viewing live tv from the same source. Here is a debug log and a screenshot of the corruption in effect, does anyone have any ideas why this is happening specifically with live TV? Thanks.
http://pastebin.com/P1njXXxW
http://imgur.com/x059JCB