Background: Since more than one year the stations of the 1st german TV chain omit most of the I-frame flags in their programs, especially during TV movies.
These recordings can not be cleaned with avidemux at start and end because it seeks automaticly for the next I-frame flag, which can end-up far away later or earlier on the timeline. This behaviour is very detrimental - and un-necessary according to my experiences, if approx. a second of flickering after the start is acceptable.
You probably mean DVB-T2 broadcasts (HEVC encoded). I need to double-check check whether the latest known good 2.8.2 nightly which is r241212 from Dec. 12 of 2024 already contains the fix, but please try r241212 instead of whatever older build you are using.
Missing IDR frames in DVB broadcasts are the norm, the bug was Avidemux ignoring keyframes when both IDR ans keyframes were present.
Thaks for the quick answer. 1. You're right, I'm using R 2.8.1 (2022 ?). But nowhere in the WWW I can find R 2.8.2, even not on sourceforge.
2. You're right again, I'm mainly recording DVB-T2 H.265 TV movies. But all emissions of the 2nd german TV chain (also DVB-T2 HEVC) do not have the same problem as before (DVB-T2 since approx. 2018) up to March 2024 also the 1st chain and these recordings can/coud be cleaned in a very short time with avidemux. If you need more information, let me know.