Can't watch DVB-T in HD

Cutter

I'm using a rpi5 + TV Hat to watch french DVB-T channels. TVHeadend found most channels but the streams are all in SD. I tried to switch to HD by setting the services' type override to HD TV and mapping services again, but it didn't help.

It also found two UHD channels but watching them crashes tvheadend after the following console messages:

2024-08-01 17:38:47.757 subscription: 0012: "HTTP" subscribing on channel "France 2 UHD", weight: 100, adapter: "Sony CXD2880 #0 : DVB-T #0", network: "TNT", mux: "498MHz", provider: "GR9A", service: "France 2 UHD", profile="webtv-vp8-vorbis-webm", hostname="192.168.1.20", username="admin", client="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0"
2024-08-01 17:38:50.514 transcode: 0004: 01:HEVC: ==> Using profile webtv-vp8
2024-08-01 17:38:50.514 transcode: 0004: 02:AC-4: unknown decoder id for 'AC-4'
2024-08-01 17:38:50.514 transcode: 0004: 02:AC-4: ==> Filtered out
2024-08-01 17:38:50.514 transcode: 0004: 03:EAC3: ==> Filtered out
2024-08-01 17:38:50.514 transcode: 0004: 04:EAC3: ==> Filtered out
2024-08-01 17:38:50.514 transcode: 0004: 05:EAC3: ==> Filtered out
2024-08-01 17:38:50.514 transcode: 0004: 06:DVBSUB: ==> Filtered out
2024-08-01 17:38:50.514 transcode: 0004: 07:DVBSUB: ==> Filtered out
2024-08-01 17:38:52.380 tsfix: transport stream HEVC, DTS discontinuity. DTS = 226035, last = 62235
2024-08-01 17:38:52.534 libav: AVCodecContext: v1.12.0
2024-08-01 17:39:21.651 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new
2024-08-01 17:39:31.596 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new
2024-08-01 17:39:41.647 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new
2024-08-01 17:39:51.642 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new
2024-08-01 17:40:01.684 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new
2024-08-01 17:40:11.697 mpegts: too much queued input data (over 50MB) for Sony CXD2880 #0 : DVB-T #0, discarding new

DaveH

I don't know much but a quick scan of the TV Hat spec says max bandwidth is 8 MHz whilst an article about French UHD transmission talks about 25 Mbps. Are you sure the device is capable of receiving the broadcasts? BTW HD is not UHD.

ukn_unknown

my opinion is that 'profile="webtv-vp8-vorbis-webm"' is the problem. Switch the profile 'pass' in order to lower the CPU requirements. RPI5 is not able to transcode software 4k image or even HD image ... I don't have this HW to try, nut I am almost sure is not that capable.

Flole

Not even my intel based server can do HD software based transcoding, so a raspberry pi likely can't do it either. Use hardware based transcoding, or no transcoding at all.