I created a bd.m2ts file by putting "HDV 1080i/25" as the preset. Bd-render worked until the renderig was complete then CinGG shut down (I don't have a BD-burner). Doing ffprobe on this video I get: Input #0, mpegts, from 'bd.m2ts': Duration: 00:01:06.91, start: 0.074667, bitrate: 10242 kb/s Program 1 Stream #0:0[0x1011]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1440x1080 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 90k tbn Stream #0:1[0x1100](ita): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s The video is slightly stretched and reduced to 4:3 from the original 16:9. By applying the downsample filter and setting H and V to 40 the pixels become clearly visible and can be seen to be square.(cfr http://www.g-raffa.eu/Cinelerra/HOWTO/anamorphic.html) In postimage, I have uploaded several screenshots showing the "info--details" of the three original sources that make up the video, of the bd.m2ts (hdv.jpeg) file, and also of how the "set format" is automatically set. [@Andrew, is it possible to put PAR and DAR in the Set Format window as shown in the image?] Note: If I force, in Set Format, the aspect ratio (DAR) to 16:9 I get, with the downsample filter, rectangular pixels. But the video is no longer deformed.... The patch seems to work, as "guessed SAR/DAR" and "detected SAR/DAR" appear, but only in source1. In source2 (which is a 4k) there are neither, and in source3 and hdv.jpeg there is only "guessed SAR/DAR". The other 3 patches also seem to work since rendering bd.m2ts worked. https://postimg.cc/kDNqfpT0 https://postimg.cc/SJyq5f5J https://postimg.cc/VdD1cbQ4 https://postimg.cc/ctWZdRLk https://postimg.cc/tnzbJs1q