It seems to me using some tapes that have some sort of lightning/flashing effect when the brightness goes from dark to very bright, it seems to mess up the TBC a little bit by scrambling some lines for a frame or so. I've had no trouble with vhs-decode while decoding this tape. Looking at some of the frames closer they are not perfectly straight, they bend sort of near the top. I've tried every other decode method (drh, use_saved_levels), they didn't help. Tape dated circa. 1986.
Using reverse field-order can give me a better idea of what the misaligned fields look like here. (starting with frame 82, shown below alongside the frames surrounding it.)
(Frames 81-83)
(Frames 84-85)
(Frames 86-87)
(decoded using the latest vhs-decode version 0.2.7 via windows, and original .lds file shortened via linux.)
It seems to me using some tapes that have some sort of lightning/flashing effect when the brightness goes from dark to very bright, it seems to mess up the TBC a little bit by scrambling some lines for a frame or so. I've had no trouble with vhs-decode while decoding this tape. Looking at some of the frames closer they are not perfectly straight, they bend sort of near the top. I've tried every other decode method (drh, use_saved_levels), they didn't help. Tape dated circa. 1986.
Using reverse field-order can give me a better idea of what the misaligned fields look like here. (starting with frame 82, shown below alongside the frames surrounding it.)
(Frames 81-83)
https://drive.google.com/file/d/1yNKrcbSU-STA3XYNCKcZ3DV9DVP7o6PR/view?usp=drive_link Provided a shortened .lds file using ld-cut to trim it down to 250 frames.