Software filters in a nutshell, denoising and deinterlacing VHS video captures
At the moment, I dump VHS and Betamax videos (PAL) through an AVT-8710, through a Canopus ADVC110, through the program WinDV, onto my computer. The footage is then loaded up through virtualdub, and modified as such.
- deinterlaced (double frame rate) - downscaled from 720x288 to 'approx' 352 x 'exactly' 288 (Lancoz 3) - De-noised using "Neat video" filter - Upscaled twice using "Deemon Video Enhancer" (from '352'x288 to '704'x576, then again to '1408'x1152) - Borders are carefully cropped (with assistance from a ratio calculator to maintain a 5:4 ratio). - Footage is downscaled to 720x576 - Footage is re-interlaced - Footage is saved as uncompressed avi for later conversion with TMPGenc At the moment, I am yet to research a 'better' interlacer that can interlace a 50fps 720x288 media to 25fps 720x576 (will make the downscaling in the previous step more effective). I have also experimented with Colormill...but I hate it. Its good for optimising colour in a single scene, but I find it useless when converting a entire video, as there is no universal setting that will work for a video with millions of different scenes. All in all, for every hour of footage, it takes approximately 24 hours to filter the footage using the above filters. This leads me to think that I will either need more computers to make the processing timeframe more practical, or...maybe I'm just not doing this right :P Am I on the right track? |
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Deinterlacing, even side-by-side field separations, don't always work as planned. I know that all of the VDub side-by-side deinterlacers are imperfect, and can leave motion artifacts after certain filters are applied (between de-interlace and re-interlace). Median is one such filter. There are several more, but I don't remember them off the top of my head (which also means they're not regular-use type filters). Quote:
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ColorMill is very good, but Premiere lends itself to an easier workflow. No disagreements there! Quote:
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On a slightly related note, would that $8000 ikena reveal software upscale better than video enhancer, or is it all a bunch of false hype? Quote:
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...can I say shitloads? :P Quote:
On a simular note, what would be the ideal budget for a 'number' of video conversion rigs? Maybe $1000 each? Quote:
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CPU: Intel Core i7 2600k 3.4Ghz ($319AU) MOBO: Gigabyte GA-Z68MA-D2HB3 (w onboard video) ($159AU) RAM: 8GB DDR3 1333 Kingston Memory (2x 4GB) ($159AU) CASE: Coolermaster Centurion 5 II (w 500W PSU) ($108AU) HDD: 3Tb WD30EZRS/X ($178AU) DISC DRIVE: LG BH10LS30 Blu Ray Writer ($99AU) All up, the hardware weighs in at $1022AU from netplus.com.au. Obviously the software will cost extra :P Considering that I may be investing in multiple towers, would a rig like the one above be the way to go? |
Right way to go? For capture systems, no. Although some of that would depend on the cards in use.
For encoding systems, yes, that would work. The biggest mistake people make is throwing huge sums of money at CPUs, when it's really not as important as the common myth/mantra makes it out to be. Yes, a fast CPU is good. But any decently fast CPU suffices. When it comes to video work, look at the core speed more than anything else. At 3.4Ghz per core, you're doing well. But still keep in mind that quite a bit of video encoding software only sees 1-2 cores. Even those that see more cores cannot actually use it because of bottlenecks in the storage (hard drives). And no, throwing RAID and faster drives at it doesn't necessary help. Patience is really the ultimate skill for video. Few people have it. 8GB of RAM doesn't do anything for you. Not for video. The only exception may be Adobe Premiere, when using complex timelines. A program like Photoshop uses RAM more than any video tool will need. I would get Pioneer Blu-ray burners, not LG. When it comes to cases and power supplies, go for anything that gives you low noise. Otherwise it will be impossible to do audio work with a room full of airplanes creating a wind tunnel our of your workspace. |
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All 8 Virtual cores are being consumed by Virtualdub. Quote:
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If and that is the word...if you could put a hardware color corrector, like a good proc amp, it may
make your work easier once the file gets on hd. I found out early on how right Admin and LS are about hardware correction vs software. Even if the proc doesn't cure all your problems, hopefully the following corrections will be more manageable. Helps too to have a highend vcr to start with. Does DV change colors? |
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DV was created as a shooting format, not a video conversion format. DV-shot video doesn't really have these issues. It's the converted videos that have that digitally cooked look. To be fair, however, most hardware alters colors (chroma, luma, IRE) by some degree, when analog video is converted into digital domain video. This process can be further compounded by the user's choice of codecs and software. This is why it's so important to use known-quality hardware and capture software. Carefully select hardware, codecs and software, when capturing video -- as well as carefully selecting everything that comes before it in the wokflow (i.e., cameras, VCR/VTR, TBCs, added video/audio hardware, etc). You can mitigate and prevent certain damage from happening by simply using intelligent transfer methods. |
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