OT:Review of Demo version of DVRack

Bill Ravens wrote on 8/12/2004, 7:40 AM
I've been playing with the DEMO version of Serious magic's "DV Rack" and thought I'd write a simple review of it. In short, it does what they claim it will do.

Step one is to calibrate the monitor using the built-in NTSC color bars. Calibration involves turning the chroma off and setting the black bars with brightness and contrast controls, then turning the chroma on with only the blue gun to set color. You adjust the color bars with the chroma and phase controls. Once the monitor is set to go, so are you. So far, pretty standard monitor setup procedure.

Step two is to capture some footage, which by the way, is almost too easy. You can capture footage by hitting the RECORD button in the software. As long as your camera is powered up, there's a signal coming over the firewire bus. No need to hit "record" on the camera. The capture footage resides in a special folder that DVRack creates on your hard drive; that makes the footage available to DV Rack. I experienced no dropped frames in the over 60 minutes of footage I captured. While in this folder, you can recall the footage with DVRack to scrub thru it. You can also have DVRack identify video or audio signals that exceed some preset level you have defined. While the footage is in the special folder, it's not accessible for viewing or access by any other software. IN order to view your captured footage in any other software, like your NLE or WMP, you have to eject it from DVRack. You can do this by selecting the "eject" command. Unfortunately, once you've ejected the footage, DVRack can no longer view it, it's permanently ejected. I was hoping I could load some footage I'd already captured into DVRack for analysis, and, fortunately DV Rack WILL read a video stream coming from my DSR-20. This means anything on DV Tape is available to run thru DV Rack.

I will say, however, that the realtime monitoring of my video has proven quite valuable. I can see the effect of adjustments made on my XL1s directly in DVRacks monitor and various scopes. By the way, the scopes, like any scope, needs to have the gain and biases calibrated before you can use them. There are no directions how to do this, so, you've gotta understand what your looking at to use it effectively. Also, the screen sizes of the various components of DVRack are not adjustable. I found the Vectorscope and Waveform monitor windows to be too small to see well enough. The scales aren't large enough to see clearly. The monitor allows you to select a couple of zebra pattern modes to monitor exposure. I'm used to the over exposure zebra, but, DVRack also gives you the option of setting up an under-exposure Zebra. This is sweet!

There seemed to be some small glitches when switching from the realtime monitor to scrubbing video that hasn't been ejected from the DVRack folder yet. The image in the monitor would hang showing only half a screen image. A few tries, going back and forth, finally got the software to fix the monitor image.

All in all, I found the DVRack software to be pretty useful. I'm not convinced, however, that the full purchase price is justifiable. It seems pretty steep.

Now, if only I can load this software into my palm pilot and leave my 10 lb GRT-390 laptop at home.

EDIT: I originally posted that the DV Rack would not read from my DSR-20. It turns out I was having problems with a bad 1394 cable. After reading my report on this forum, Serious Magic contacted me and made their customer support immediately available to help me. I'm quite surprised at their eagerness to correct any problems with their software. Glad to say the problem was my own clumsiness.


Bill Ravens__________________
Chalchihuitl Productions
Santa Fe, NM
www.geocities.com/ravens202

Comments

farss wrote on 8/12/2004, 8:00 AM
I've had one go at getting it to run and one limitation to be aware of, it will not run without a video card capable of 32 bit color. I guess if you're trying to emulate a studio monitor this makes some sense but if all you needed was say the scopes you're still screwed, pity.

Bob.
BrianStanding wrote on 8/12/2004, 12:29 PM
I certainly understand the value of the field monitor emulation.

As for the capture application, what do you see as the big advantage over, say, capturing live video through Vegas Video Capture?

On a similar thought, could you capture a small bit of video in this way, and then run Vegas scopes on the captured video?

It would be nice if they sold this in components, so you only pay for the pieces you need.
Bill Ravens wrote on 8/12/2004, 12:59 PM
<As for the capture application, what do you see as the big advantage over, say, capturing live video through Vegas Video Capture?>

1-the ability to scrub multiple captured clips real time
2-the ability to flag out of range signal (audio and video) real time
3-This really isn't a "capture" utility as much as a Direct to Disk Recorder.

In fact, i did just what you suggested, trying to compare the V5 capture utility to DV Rack. The only disadvantage is the cumbersome method. And, of course, it's impossible to do real time monitoring.


Stephanb wrote on 8/12/2004, 1:33 PM
Extract of the FAQ from Serious Magic. Sorry about the lenght...

Can’t some editing software do much of what DV Rack does?
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No, while some functions may appear similar at first glance they are actually quite different. Non-linear editors are amazingly powerful tools but they weren't designed for real-time field production, monitoring, recording and evaluation (actually nothing was until DV Rack). There are many features that DV Rack offers the shooter that nothing else does:

The DV Quality Monitor module brings sophisticated automated quality monitoring to DV shooters for the first time. This module monitors your video and audio and alerts you if user-set thresholds for acceptable quality are exceeded. This is done in real-time and markers are inserted on the clip so you can see where potential problems lie. You can immediately jump between quality markers at the press of a key.

In addition to watching your video for levels and your audio for clipping, it has some trick digital signal processing that detects troublesome plosives in audio (such as the infamous popping "P"). Even if the popped "P" doesn't clip it will still be detected. DV Rack actually learns the ambient background noise and then automatically determines a primary signal level. If that signal has an anomalous spike within a given window, it'll mark it for review.

The field monitor in DV Rack can really be set up to bars. Yes, you can load something that looks like bars in other tools but those are a picture of bars, not real bars. Real SMPTE bars have information in them that cannot be conveyed in an image format like JPG or BMP. DV Rack's field monitor has a one-click Bars button that displays special bars stored in a custom internal format. They are full-spectrum YUV and actually have super-black (and super-white) in them. This permits you to properly adjust screen brightness and contrast using the PLUGE setup area (if you don’t know how to do this just follow DV Rack’s step-by-step instructions. It takes about twenty seconds.) DV Rack’s bars work exactly like true SMPTE bars being fed from a signal generator into an analog field monitor.
The SureShot camera setup module uses calibration charts printed on cards that come with DV Rack. It walks you through a simple four step wizard-like process to objectively set up your camera best quality. For example there is a meter that tells you at a glance how correct your white balance is. There is another meter that tells you objectively how in focus your shot is.
DV Rack has dual zebra stripe patterns that can be set in 1% increments. Either zebra can be set to alternative mode called dark zebra which is the inverse of the bright zebras on many cameras. Dark zebras are quite useful, for example using dark zebra you can finally see how much of a dark area is being crushed to full black. This is invaluable, particularly when shooting for a film-style look.
The split screen mode lets you instantly compare a live feed with a pre-recorded clip which is ideal for matching camera setups or continuity. No NLE that we’re aware of can do real-time splits on live video.
The real-time interactive zoom mode on live video is very handy for checking details in a shot. The "underscan/normal scan" switch works like a real broadcast field monitor. NLEs typically only show the full active picture area with perhaps an overlay denoting safe area.
The monitor has adjustable grid marker overlays that are ideal for shot framing.
The Spectra 60 module gives real-time pixel info in five color spaces.

There is more, but the point is that DV Rack was specifically designed to meet the unique workflow needs of shooting. Non-Linear Editors (NLEs) weren't. For instance, NLEs don’t slave to your camera, they do the opposite, they control the camera). In DV Rack when you hit your camera's record button, DV Rack starts recording (with the pre-record buffer added to the front of the clip). While you're in shooting mode with DV Rack you won't need to access a pull-down or pop-up menu to get to functions you need. All the functions in your workflow are immediately accessible on directly clickable buttons and knobs. Also, the typical NLE interface is designed for an operator sitting at an editing desk. DV Rack's interface was designed for an operator who is standing, and possibly, a bit of distance from the screen.



farss wrote on 8/15/2004, 3:44 AM
I've got the beta version working and hit a snag (don't I always!).
Capturing to AVI T2 is fine for a short clip however after I capture around 90 mins of video as one 18 Gbyte file Vegas will not digest it.
This is the second capture and both have the same problem it seems. If I use AVI T1, Vegas says it needs to build an audio proxy, so I gave that a miss and stuck with AVI T2.
Now AVICodec sees nothing wrong with the file and reports "dsvd = Sony Digital Video Supported." Don't really know quite what that means but it doesn't look bad.
I can convert the file using a Canopus utility and then Vegas will accept it.
Video is coming from ADVC-300 so the actual codec would be Canopus's so I'm all in all a tad confused. I'm recalling some prior issue regarding how Vegas expects some of the header data to be presented, seem to recall the issue had something to do with larger files so this problem would seem close to that.

One other thing if anyone who has Serious Magic's ear. The .smvp file. It's be really, really useful if there was a way to convert the data in there into a .sfk file, say so that the DV Rack markers could be imported as markers in Vegas.
Apart from this issue I'm LOVING this tool, it has everything I need and is a great adjunct to the ADVC-300. Not only can I see in the monitor how changing procamp settings in the ADVC-300 affect the video, I can (at last!) see the results on scopes.

If they get this problem sorted out I reckon I know at least one Mac user who'll switch to a PC just to use this app. I know maybe Serious Magic never had this in mind when they designed this thing, but for anyone who does serious DV capture from analogue tapes this is a must have.

Bob.

NickHope wrote on 12/23/2004, 1:48 AM
Do you guys think it would be possible to use DV Rack's video monitor large (or even full screen) on my laptop to monitor video I'm working on in Vegas on my desktop? At the moment I monitor on a TV which is inaccurate (and it's on its last legs anyway). Presumably if DV Rack will monitor an incoming IEEE 1394 stream, it will do this from another computer instead of a camera??? I'd be more willing to pay for DV Rack if it allowed me to monitor at home as well as do it's magic in the field.
smhontz wrote on 12/23/2004, 10:02 AM
My trial didn't go so well. I tested using DV Rack to capture hour+ footage and in both cases it locked up, leaving me with files that it couldn't read and Vegas couldn't read. Luckily I ran tape at the same time. I also used Vegas capture to run the same tests and it captured flawlessly. DV Rack worked OK for short (< hour) captures.

To their credit, Serious Magic acknowledged that it was a bug and they were working on a patch for it. So, it may be fixed by now. But losing data without some way to recover it is a big NO-NO in my book. I'll wait a few months until the bugs are worked out and then take a look at it again...

Your mileage may vary...
NickHope wrote on 12/23/2004, 10:36 AM
Capture problems aside, does anyone know if it would work as a monitor-only app on a second computer?
Barry_Green wrote on 12/23/2004, 12:09 PM
Yes it would work. However, be aware that the DV Rack monitor only displays about 300 lines of resolution (even when zoomed in, or in fullscreen mode) so it's not going to be an ideal replacement for a proper production monitor.