Dom Silverio
Forum Replies Created
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See if you can install a newer version of the drivers or at least use the one that comes with your Avid
C:Program FilesAvidUtilitiesnVidia -
Well I should be more accurate then
DV is I Frame only DCT compression unlike HDV 🙂
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It is not quite apples to apples.
First you need to consider that HDV and DVC Pro uses 2 different compression system – DCT vs MPEG.
Second DVC Pro is not full raster. At 720p, DVC Pro HD sample only form 960 lines in the luma channel and 480 lines in the chroma channel. So the data rate is only part of the story. DV25 samples from full res in both Y and C channels.
So comparing HDV and DVC Pro HD is not easy. I still prefer DVC PRo HD [easier to edit and 4:2:2] but shear data rate does not reveal why DVC Pro HD is superior.
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My mistake. Talking about data rate per frame and not per second.
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Graeme if I am not mistaken the numbers are relatively the same for 1080 and 720 in regards to DVC Pro HD.
1080 has less frames but more pixels. -
The overlay is not full res.
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It is a fine deck. Works great.
If you use the firewire port, you are not bringing in the DigiBeta at full res but a compressed DV resolution. So you are transcoding the Digibeta to DV.
DV is of course 3.6 MB/s or about 13.5 GB/h.
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And how much recording time did you get with that? And you have a permanent copy to boot…
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[MPE] “NLE can use any data rate – t”
Should be FRAME RATE.
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[Walter Biscardi] “BUT FCP can read the 24 fps flagged frames so your date rate for a 23.98 clip is different than a 59.94 clip. “
That is my point. It should be the same if you expect to allocate more data per frame.
Nevertheless, as Oliver explained, the codec while being used in the NLE can use any data rate – thus not compatible with DVC Pro HD decks unless converted back to 100 Mb/s @ 60p.