Hallo Stefan,
ich habe mir das Log nochmal näher angeschaut.
Eigentlich sollte die iGPU ein TV-Bild an deinen TV ausgeben.
Die Video Meldungen am Ende dieses Ausschnitts aus deinem Log deuten darauf hin, dass der Videostream auf jeden Fall dekodiert und per HDMI ausgegeben wird.
Oct 29 20:57:43 hdvdr.fritz.box vdr[3761]: audio/alsa: using device 'default'
Oct 29 20:57:43 hdvdr.fritz.box vdr[3761]: audio/alsa: start delay 336ms
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: [3761] max. latency time 1 seconds
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: codec: YUV 420 supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: codec: YUV 422 supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Using entrypoint for vpp: 10
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: 0,00 - 64,00 ++ 1,00 = 0,00
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Enabling denoise filter (pos = 0)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: deinterlacing supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: bob deinterlace supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: motion adaptive deinterlace supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: motion compensated deinterlace supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Enabling Deint (pos = 1)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: sharpening supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: 0,00 - 64,00 ++ 1,00 = 44,00
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Enabling sharpening filter (pos = 0)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: enabling color balance filters
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: Supported color balance filter count: 5
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Hue (-180,00 - 180,00 ++ 0,10 = 0,00) (pos = 2)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Saturation (0,00 - 10,00 ++ 0,01 = 1,00) (pos = 2)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Brightness (-100,00 - 100,00 ++ 0,10 = 0,00) (pos = 2)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Contrast (0,00 - 10,00 ++ 0,01 = 1,00) (pos = 2)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: AutoContrast (0,00 - 0,00 ++ 0,00 = 0,00) (pos = 2)
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: skin tone enhancement supported
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: video/vaapi: 0,00 - 9,00 ++ 1,00 = 3,00
Oct 29 20:57:44 hdvdr.fritz.box vdr[3761]: Enabling skin tone filter (pos = 3)
Oct 29 20:58:34 hdvdr.fritz.box vdr[3761]: video: 13:47:25.651 +58 274 0/\ms 23+3 v-buf
Oct 29 20:59:24 hdvdr.fritz.box vdr[3761]: video: 13:48:15.651 +58 314 0/\ms 43+3 v-buf
Oct 29 21:01:04 hdvdr.fritz.box vdr[3761]: video: 13:49:55.651 +58 298 0/\ms 37+3 v-buf