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#11 |
Senior Member
Join Date: Oct 2007
Location: USA
Posts: 1,882
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A good analog tape player will include a line TBC, that ensures each video line has proper timing and sync pulses at the analog output. In many (but not all) cases the analog output of the VCR also has frame timing inaccuracies that an external frame TBC can correct. (And in a few cases it might make things worse, depends on the signal coming out of the player.)
This is because the consumer home video formats (VHS, S-VHS, 8mm, Hi8, and Beta) were built to work with home TVs and with cost in mind, so everything was based on the lowest cost system that produced a first generation playback image that is acceptable to most home consumers. (Home TVs generally tolerate sloppy signals better than most video capture cards.) If you plan to do serious video restoration/correction the best capture format is a lossless 4:2:2 format. This preserves all the video signal, with its noise, for later processing in the digital domain with sophisticated tools. (Capture to a lossy format (including DV) will give up some image information along with some noise in the interest of bandwidth.) There are lossless formats that do provide some compression (a bit like ZIP file compression), but they still require a lot more storage than DV files. (Lossy formats have compression artifacts that will become exaggerated during decoding/decoding cycles and processing round-off/truncation. It all boils down to how good is good enough for your purposes. |
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#12 | |
Senior Member
Join Date: May 2007
Location: Belgium
Posts: 1,196
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Yvon durieux alias "Haddock" Belgium GMT + 1 Sorry for my poor english, I am french native speaking Main System: Azus Z87 Pro, 4770K@3.5Ghz, 16gb ram, Nvidia GeForce GT 630, Windows 7 Pro 64, Samsung 840 pro, Edius 8.53.2808 WG and 9.40.4896 + NXexpress or HDspark, 2T separate video SSD. |
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#13 |
Senior Member
Join Date: May 2007
Location: Belgium
Posts: 1,196
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Another point that can be interesting for my client....
Some clients want only "digitilizing" their video cassette or film and want to receive a "universal" readable files on any computer. Capturing with Edius (analogic or via DV) gives in the properties "Canopus DV.avi". I know that there is also Microsoft DV : AVI Files Containing One DV Data Stream (Type-1) Is it possible to choose this codec immediately with Edius ???
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Yvon durieux alias "Haddock" Belgium GMT + 1 Sorry for my poor english, I am french native speaking Main System: Azus Z87 Pro, 4770K@3.5Ghz, 16gb ram, Nvidia GeForce GT 630, Windows 7 Pro 64, Samsung 840 pro, Edius 8.53.2808 WG and 9.40.4896 + NXexpress or HDspark, 2T separate video SSD. |
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