so according to link below it was possible in 2010 or so. thing is apparently new versions remove this feature because you know, 'progress'! https://www.vegascreativesoftware.info/us/forum/hdv-to-blu-ray-why-is-it-rec... I think technically it completely possible, just need some coding thinking. Terje, can you check if 'native mpeg' decoder still works for HDV specifically? (toggle Use FFmpeg first icon/button in main window and then load your file(s) ) I think it was working in cinelerra 2.x times because people edited HDV back then and ffmpeg was little decoding library inside libquicktime folder for some mov/avi decoding .... may be developing mpeg2 video elementary stream direct copy will be a bit less of Task compared to more generic case? At least libmpeg3 already know how to create index file, so info about keyframes and GOPs all should be there ...'only' problem I never dived that deep into real inner workings of encoder (some forum post suggest you need to edit at *field* boundary, not frame boundary, and this complicates things a bit), and one bit set wrong there obviously can make file unplayable :(