DVL-Digest 667 - Postings: Index anyone returned items to camer Frame Mode questions Question about line doublers realtime DV (was: New Canopus - (2) - (3) Strange thing on the PD 150? Viewfinder on DSR250: Charles anyone returned items to camer - "Perry" >Im planning on returning my new pd150 i just got last week from cameralworld. I just cant get used the the b/w viewfinder.Doesnt have the contrast and separation that my dsr300vf does.The picture is great but ill probably get a 250 after ive checked it out.< It's the same viewfinder, just a different case! Perry Mitchell Video Facilities http://www.perrybits.co.uk/ Frame Mode questions - Adam Wilt This mode is like taking lots of full frames stills at 30fps. If so, > the images are captured without fields ? Both fields are captured simultaneously, so there's no interfield jitter. > And when transfered to the computer for > post production, they remain this way, intact, full frame ? It's still stored as two fields, but when viewed in still or pause mode, as on the NLE's display, it's a coherent, full frame. > 2)Are they stored on the tape the ordinary way or are they stored as > sequential still frames ? If so, can they be digtized this way ? It's stored as field1, field2, just like normal video. > 3) Somebody once said here that video taken in this mode doesn=B4t > look good when transfered back to film - is that true ? Yes. Horrible motion judder converting from 30fsp to 24 fps. > 4)Finally, does this mode has other speed mode ? No, it doesn't. Unless you get a 625/50 ("PAL") camera, in which case you'll get 25fps -- and this DOES transfer to film very nicely with a 4% slowdown. Question about line doublers - "Perry" Andrew posted: >I was just wondering about these high end line doublers and field doublers for tv and hdtv home systems. I was wondering if it could be used to progressively scan a interlaced image from a dv camera back to another dv camera (through s-video, probably not fire wire) in order to give it a progressive scan look, like a higher end camera. Or even the option of processing the footage out from the computer back into the dv camera for the same effect. Anyone tryed this, experiemented or am I missing something crucial.< 'something crucial' is that these are display techniques, you cannot record them. Line doublers and field doublers all increase the bandwidth considerably and would need a high def tape format to record. They don't add any information, they simply give the brain less work to do! You can get a 'progressive scan' look by processing the interlaced pictures in After Effects. You have to understand that you cannot then show fully progressive scan images on an interlaced scan display without some compromises, particularly with vertical resolution. Perry Mitchell Video Facilities http://www.perrybits.co.uk/ realtime DV (was: New Canopus - "Perry" Brian posted: >This is overstating things the other way, I feel. It would mean real "full time editors" are wasting their money on Avid Symphony's and Quantel Henry's and they must not really be full time editors. Now I do believe they are wasting their money, but not because of the real-time features, but because they could get similar real-time capabilities at significantly lower costs. < I don't believe either The Avid or the Quantel are real time either? Perry Mitchell Video Facilities http://www.perrybits.co.uk/ realtime DV (was: New Canopus - Adam Wilt It sounds like part of your problem is just the DigiSuite DTV... How much > longer than real-time does it take on your system? The DTV renders by playing the compressed video through the HW into a memory buffer, then "turning the codecs around" and compressing the video back into a disk file. Thus rendering takes 2x real time plus the time to turn the codecs around. As I only have 128 MB in the machine at the minute I only get about 3/4 sec of video in one go, so turnaround time is a significant part of the total time. I could probably drop rendering time by 25% by moving up to half a Gig of main memory, thus reducing the amount of codec turning needed. > What are the "clunky slow & inconvienent" issues? Compare: 1) Analog output: put deck(s) in record, put timeline in play. Watch TV. (Or use machine control to print to tape.) 2) DV output: Make Movie: watch TV in 3/4 second chunks, with free repeats! Exit Premiere, load DVCapture utility, load rendered movie. Put deck in record, put DVCapture app into play. Watch TV (again). OK, so it's not the end of the world. But consider that when the MAX option supports realtime 1394 output, squirting the program out to DV over 1394 will be as quick as scenario (1). Were I doing this day in, day out, the added time savings of the low-hassle method would definitely be worth the added cost of the realtime 1394 output. Also consider that this is with Premiere and may be limited by what the HAL allows. Apps that go deeper into the DTV's drivers, like Incite and edit*, may be able to optimize things better. It'd be nice to have a switch to send Premiere's timeline play out of 1394 instead of the DTV hardware, eliminating the need to exit to the DVCapture utility; this may be fixed with Win2K / Premiere 6 and their support of standardized OHCI 1394. Matrox also has a software DV codec that's as good as any codec available, and wicked fast, too -- with a bit of Canopus-like rework (as may have occurred with the RT2000, which I haven't used) the software and hardware could work in concert for faster rendering. If all one wants to do is DV, then the RT2000 may be the better bet (but then I would ask, why not the DVRexRT or DVStorm?). The DTV also supports component analog I/O, and has SDI and SDTI options; it's more expandable than the RT2000, so it still has value for that segment of the market that needs this multi-format flexibility. The DigiSuite line can also be driven by high-end NLE software like Incite, edit*, United Media Express, and Speed Razor -- and I'll state again, pick the software first, THEN get the hardware that supports it. All the realtime bells 'n' whistles are useless if the software doesn't fit your mode of thinking. Cheers, Adam Wilt realtime DV (was: New Canopus - "Perry" Realtime Avids depend on the hardware, lots of different machines out there; Quantel Henry is certainly not real time. It's quite amusing watching the demos at shows because the operators are all trained to have some patter to distract when they do the 'processing'. It's very fast so it doesn't really make a big difference. I tested a Fast Purple recently, which actually is not that fast at rendering but because it continually does the rendering in the background (twin processors) it never becomes a problem. It's just a matter of timing your work style to suit the equipment. Any so called real time device is also going to run into trouble when you start doing layering and keying effects, and stuff like color grading and temporal effects so popular now to get the 'film look'. Perry Mitchell Video Facilities http://www.perrybits.co.uk/ Strange thing on the PD 150? - "Perry" Tom Guiking posted: >Another strange thing: I sometimes could open the iris till F2, sometimes it let me go to F1.6, but not all the time.< Yes, the lens ramps a lot with zoom. It's f1.6 only at the wide angle, goes down to f2.4 at tele end. Perry Mitchell Video Facilities http://www.perrybits.co.uk/ Viewfinder on DSR250: Charles - "Perry" Sorry, my mistake, I got the spec pages muddled up somehow. I've been mostly using the LCD side screen, but now I take a good look at it it is clearly better than the PD150 VF. I imagine the problem with getting a better LCD VF is that there are very few uses for high res monochrome screens with enough umph. The same problem has always existed with CRT screens as well, particularly to make one the size of the side LCD display. I remember way back the BBC made a few for drama to mount on their Sony 330s. They used a CRT normally powering the head-up display in a fighter plane. Not only was it bright green, but it consumed more power than the camera did! Perry Mitchell Video Facilities http://www.perrybits.co.uk/ (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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