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Actually, there has always been a little less controversy about using DV for PAL because most people agree that the PAL 4:2:0 color model provides a little better color than the NTSC 4:1:1 approach.
However, the main points made by both of us apply equally to NTSC and PAL. -
Yes, for both.
While 4:1:1 is kind of annoying to deal with and not great (but not too bad for the super low resolution VHS chroma anyways), it is the lesser evil compared to the flaws of the numerous crappy capture devices the unaware user may buy. Plus the large number of possible mistakes to make in terms of software and settings.
I'm with johnmeyer on this – DV is obviously not the pinnacle, but it's a whole lot better than what most users get when they try to capture lossless without having years of experience. -
I see. The DV "robustness" advantage materializes only with an external VHS->DV conversion (e.g. videocam as digitizer in passthrough) as I understand it. When the DV codec is SW in the PC one would basically experience the same hassles as with lossless analog captures, right?
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Yes, exactly.
Choosing a DV codec for capturing with hardware that delivers uncompressed would be irrational in any case considering the alternatives available (Ut Video, HuffYUV, etc.). The advantages of DV only play out with a combination of native DV hardware plus an unexperienced user and/or crappy lossless-hardware. -
Yes, that is correct. If you have a choice of codecs to use with the capture card in your computer, DV should not be your first choice. The big advantage is using your DV or Digital8 camcorder in pass through mode. That capture chain is near-bulletproof. The only issue these days is finding a computer that has a Firewire/1394 card and then finding drivers that will work with modern versions of Windows. I still have lots of computers running XP, and everything purrs with that old workhorse.
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Hi,
Sorry but I was wondering, won't it be better if after deinterlacing (I recommend QTGMC for that) then cropping the noisy borders, you should resize to 640x480 which is a true 4:3 resolution ?
Your VHS tape has a 4:3 aspect ratio, so this may be closer to the orignal.
I would be interested by the opinion of the others who have already replied. -
640x480 is not recommended.
For a h.264 based MKV or MP4 you just crop to mod4, then encode with SAR signaling. Upon playback there is one (and the only) resize to whatever player size or display you use. It is of course perfectly 4:3* then but you avoid the intermediate resize.
If you really want to resize before encoding, go for an upscale to 1440x1080. There is no benefit in 640x480, actually it makes it slightly worse. It is legacy.
* Edit: depends on cropping whether it still ends up as exactly 4:3 or just very closeLast edited by Skiller; 3rd Oct 2022 at 20:05.
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I for one don't even deinterlace VHS captures. I crop mod4 and filter interlaced (typically even/odd grouped fields, depending on the filter type) because I am not very happy how QTGMC processes VHS noise. I encode as interlaced with SAR signalling without any resizing. I know it's debatable but it's just my preferred workflow for my PAL VHS tapes.
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I do the same thing. I do not understand some people's obsession with deinterlacing. You don't need to do it unless you are going to change the resolution and since up-resn'g is also a waste of time, you don't need to do either of them.
There are plenty of other things you can do to VHS captures to dramatically improve them, like denoising, stabilization (of unstabilized hand-held camera movement), color correction, dropout removal (if you used cheap tapes), chroma correction (especially for NTSC color), etc. -
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I would be interested by the opinion of the others who have already replied.
For YouTube I upscale to 1440x1080 to allow less degradation in YouTube video processing.
I do not understand some people's obsession with deinterlacing.
In addition, many of the AviSynth filters are designed for progressive material, and using the SeparateFields().SelectXXX() is less effective than working with (lossless) deinterlaced material, because you use half of the temporal data.
If somebody wants to keep the video interlaced, he can use a lossless deinterlacing (i.e. QTGMC(lossless=1)) prior to filtering and then interlace back at the end. -
If deinterlacing is then "discouraged", I'm curious what do people recommend VHS captures (or DV video files) get converted to? mpeg2? interlaced h264? I'm talking about converting to video files that will be played (a) mostly on a TV/media player via streaming or USB stick and (b) on the computer.
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For both (a) and (b) I would opt for deinterlacing (50p, 60p) and h.264 inside mp4 container, no resizing (just mod4 cropping or no cropping at all). I would use the same encode for both.
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I would resize to at least 720p, because if you decide to upload to Youtube, it will not honor 50p/60p if the resolution is lower than 720p.
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Good point, but, for me at least, I wouldn't want to compromise my main encode just in case I wanted to upload the video to YouTube. You can always make a YouTube optimized encode additionally, or whenever you need it if you don't delete the originals.
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