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25th October 2017, 07:40 | #1 | Link |
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How to recover progressive frames from this opening space shot from Star Trek Voyager
I'm a long-suffering Star Trek fan, doomed to DVD encoding oddities. Currently, I'm working through Star Trek Voyager. I'm ripping, IVTCing to mkv vfr, encoding to HEVC. Things are going swimmingly.
Then I encounter this at the beginning of the episode entitled, "Heroes and Demons," from season 1. It is the opening shot of the USS Voyager gliding past the camera into the distance. However, it is combed, and the pattern doesn't make any sense to me. I have separated fields, it's still combed in the individual fields. I'm guessing that this is simply a completely screwed up transfer to DVD that is probably unrecoverable by any sane means. So, I present to you the following sample. Anyone have an idea? sample.vob Update: Barring a wizardly method of recovering the frames, I have simply selected the two good frames out of each 5 frames using selectevery(5,1,2). Of course, that now leaves me with a ~ 12fps, jumpy sequence. I can just keep one of them, giving me a ~ 6fps sequence, which is a nice divisor of 30fps. Is there any way to interpolate frames in this situation to get back up to 30fps? I fear not, especially at the beginning of the sequence where the ship is moving quite a bit between frames. So, I'm left with either keeping the original combed frames, or removing the combed frames but creating a very low fps sequence. Last edited by Mawazi; 26th October 2017 at 05:17. Reason: additional information |
27th October 2017, 07:55 | #3 | Link | |
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Avisynth and its plug-ins are really something, there's always a solution waiting to be discovered! :-) |
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27th October 2017, 12:31 | #4 | Link |
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Have you tried srestore http://avisynth.nl/index.php/Srestore? And btw did you figure out a way to get rid of the rainbowing? I see it even on the netflix version.
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28th October 2017, 04:19 | #5 | Link | |
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28th October 2017, 06:08 | #6 | Link |
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Not Perfect, but a reasonable improvement. You'd probably need to create intermediate files and do it in several passes. If I try to run all this together, apart from the complaints about cached frames, Avisynth tends to sit there spinning it's wheels.
QTGMC() Srestore(23.976, thresh=44, speed=1, cache=10) Srestore(11.94, thresh=44, speed=1, cache=10) # I probably should have used 11.988 but it seems I'm mathematically challenged. FrameRateConverter(24000,1001, preset="slower") sampled.mkv Have you found the magic setting that lets x265 keep the same amount of detail as x264, or does it still look like it has a built-in noise filter blurring out detail when encoding standard definition? Last edited by hello_hello; 28th October 2017 at 06:19. |
29th October 2017, 08:09 | #7 | Link | |
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I used my selectevery() and framerateconverter() sequence and achieved a fine version of that first space shot, except for the first few frames, which are distorted. So, I trimmed them out and recreated the fade-in from black to match up with the first good frame. I replaced the opening credits with a correct version from a different episode. As far as x265 goes, I found some settings on this forum that seem to work well when encoding to 10-bits, though I haven't done much in the way of pixel-peeking. I end up with a file about 1/4 the size of the original vob and it subjectively looks fine to me, watched it on my laptop screen and on a 50" TV. |
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29th October 2017, 08:15 | #8 | Link | |
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I'm guessing I now have one of the nicer versions of this particular episode that exists in the world. ;-) |
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29th October 2017, 11:46 | #9 | Link | |
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31st October 2017, 02:14 | #10 | Link | |
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Thanks! Sent from my SM-G935T using Tapatalk |
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