Per default the two often used players (Windows Media Player
and QuickTime) on the Windows platform default to a low
resolution presentation when playing back DV.

Edit: it seems this "issue" exists also on the Mac platform, see
the posts below!

The problem is two-fold. When you play back QuickTime footage
the file looks like full resolution but very poorly. With the Windows
Media Player (WMP) it will only show 50% of the available
resolution which reduces the picture size by half.

So if you have been asking yourself why the footage looked so
small or so bad in comparison to a TV you have just found ONE
of the reasons. There are more reasons like color accuracy of
a computer monitor versus a TV or production monitor. A TV
(interlaced) also works differently than a computer monitor (progressive).

Just check the following QuickTime player screenshots on my
Windows XP Professional computer to see for yourself: Normal playback (www.visuar.com\DVi\QT_Win_Normal.jpg)
High Quality enabled (www.visuar.com\DVi\QT_Win_HQ.jpg)(files are in jpeg format)

Now that's a scary difference! Look at how much blurring
happens and the complete loss of interlacing artifacts which
you usually really want to see to check whether footage is
interlaced or progressive or whether your de-interlacing did
its job correctly. QuickTime's default settings is by far the worst
of the two. Windows Media Player will just half the resolution
(which also looses interlacing information etc.).

You want a fix?

Fix for QuickTime
Unfortunately this will only work if you have upgraded to
QuickTime Pro. The free version does not allow changing the
needed setting. Open the QuickTime player and load a DV movie
Select "Get Movie Properties" under the "Movie" menu
Select "Video track" under the first (left) pulldown
Select "Quality" under the second (right) pulldown
Select "High Quality Enabled"
OK out of all the WindowsThe change is instant. However, this change is on a PER FILE
basis. So you will need to do this again for each file. You have
an option to save this preference with your file (QuickTime
player asks you to save changes when you exit) so it will stay
enabled for that specific file. If you do not save it you will also
need to re-enable it when you open the file again.

Fix for the new Windows Media Player (wmplayer.exe)
This player comes with newer Windows versions like XP and
probably Windows 2000 as well. Open the Windows Media Player, no need to load a file
Select "Options" under the "Tools" menu
Go to the "Performance" tab
Under "Video acceleration" click "Advanced"
The slider under "Digital Video" should be set all the way to the right ("Large")
OK out of the windows and close the playerFix for the old Media Player (mplayer2.exe)
This player comes with older versions of Windows like Windows 98. Open the Media Player and load a DV file
Select "Properties" under the "File" menu
Go to the "Advanced" tab
Select "DV Video Decoder" under "Filters in use:"
Click on the "Properties" button
Make sure it is set to "Full (NTSC: 720*480, PAL: 720*576)" under "Decoding resolution"
Enabled the checkbox "Save as default"
Click apply and OK out of the windows and close the playerNotes
As indicated the fix only works with QuickTime Pro and must be
done for every file.

Windows XP also has the older Media Player installed and it looks
like changing the setting in one program effects both.

The screengrabs came from a test Kaku Ito shot with an XL2
camera and are being used with his permission. You can view
the original movie in the following thread:

http://www.dvinfo.net/conf/showthread.php?s=&threadid=31215

Thanks Kaku! If you want to see the difference uncompressed
you can download the following BMP files (1.3 MB each):

Normal playback (www.visuar.com\DVi\QT_Win_Normal.bmp) (uncompressed)
High Quality enabled (www.visuar.com\DVi\QT_Win_HQ.bmp) (uncompressed)

<<<-- Originally posted by Rob Lohman : To the best of my knowledge this problem does not happen on the Mac platform -->>>

Actually Mac QuickTime files also default to low quality playback (or at least they have on all the versions of QT Pro that I've used, but I don't have the newest). There's a little free app available on the Synthetic Aperture (http://www.synthetic-ap.com/products/hiq/index.html) website as a free download which lets you drag and drop files to enable the high quality playback flag.

Even at high quality setting, I find DV looks significantly worse on my computer monitor than it does on an NTSC screen.

As boyd wrote, the mac does default to lower quality playback using quicktime. If you're not into free plug-ins.....Robs procedure for hiQ on QT windows is the exactly the same on the mac.

Barry

Thanks guys! I've updated the post to point to your posts for Mac info.

Yeah, I usually just go to the movie properties and manually set high quality myself also. But note that Synthetic Aperture freeware is not a "plug-in." It's a small stand-alone application. You just drag the quicktime file to its icon, high quality is enabled, and the program exits. Have never really put it through its paces though myself, other than trying it once or twice.

thanks boyd...wasn't dissin' the hi-qual program...although it doesn't seem to work on my machine...I just wanted any unaware macUsers that they could set it themselves...but back to Synthetic Aperture hiqual...I'm running 10.3.4 on a g5, QT 6.5.1...what are you running?... cause when I drag a movie over the icon...nothing happens.

Hey, diss away, I have no agenda :-) Like I said, I never really made much use of it, but just remembered it after reading Rob's post. I just downloaded from the link I gave. Took a short QT file and dragged it to the HiQual icon. You see quick zoom rectangles as the program opens and closes. That's all that should happen. But if you then try opening the movie file in Quicktime Pro you'll see that the high quality box will be checked.

Does this not happen on your G5? Entirely possible it isn't compatible, the program was written in 2002. But it works fine on my G4/1.25 under MacOS X 10.2.8 with Quicktime 6.3 pro (I'm still running FCP 3 and recall reading about problems with it under newer versions of QT, so if it ain't broke... ;-)

My guess is it's not compatible with 10.3...you can click on the icon, and it tells you to.....wait a minute....ok...my bad..... it works with .mov files...but it doesn't work with the .dv file that kaku posted earlier. I had tried several times with it, but didn't think to try something else....jammin!

BG

What's a .dv file? Is that a DV stream like iMovie uses? Yeah, I was using a .mov Quicktime file compressed with the DV codec, as captured in FCP without any alteration.

I don't really know the difference between a .dv and a .mov...the dv file is what I got when I downloaded kaku's file...it opens and acts like a .mov in QT...and i have seen them before...I tried renaming it, but it didn't make a difference to hi-qual. I noticed that the data rate on kaku's file was 6.8 mb per sec...doesn't that sound high...I thought DV was 3.5 mb per sec...

Barry

My guess is that .dv was his own shorthand for something because I think real extensions have 3 letters. Actually the extension shouldn't make any difference on the Mac. And the existence of .mov doesn't tell you what the codec was, just that it's a Quicktime file.

Boyd, no it's not my own shorthand.

.dv is a native dv stream codec within QuickTime instead of Apple's own "not really the same" dv codec. So I thought I should provide it as close as naitive dv stream. I don't know if it is effective yet, but you all know Apple tends to try to set its own standard, becoming like Sony a bit. So, I would rather provide the file as close as "industry standard". I regret to say, as long as I'm using Final Cut Pro HD, it would be not the same as industry standard.

I think you aren't entirely correct on that Kaku. What happens
(as I know) is this.

The DV stream comes from the camera and if you capture it is
a .DV file this stream is one-on-one copied to the file.

The difference with QuickTime .MOV and .AVI on Windows is that
a wrapper placed AROUND this data so players can read it more
easily. The data is NOT altered (with multi channel audio it MAY
be shifter around in place, but the content itself is NOT changed).

So a DV AVI, QuickTime DV or native .DV is exactly the same
content wise.

The reason why the Mac SA program doesn't work with a .DV
file is that it can only change this setting for a .MOV file since
a .DV file (which is JUST the basic stream) does not have a HQ
property to set.

The wrapper .MOV format does! However, when playing the .DV
in QuickTime the player allows you to set the option since it is
basically a codec setting. Has nothing to do with the original data.

Hope this explains some.

I see. But I read someone's article explaining QuickTime's DV codec is loosing some signal characteristics slightly from original DV stream.
QuickTime and Final Cut Pro improved its quality when they updated both a year ago(?), before that, the DV video quality on FCP was not good, but Apple still claimed as native DV.

You can clearly tell Avid XpressDV and Adobe Premiere are not seem to loosing much from native DV stream, but since Apple want to say everything is standard quality and running real time all the time, they must be tweaking the codec a little. What do you think?

Each DV codec is a little bit different, probably both in quality and
efficiency. On modern computers this shouldn't make too much
of a difference. And since native .DV on a Mac plays with QuickTime
as well I can't imagine a different codec is being used when the
DV stream is encapsulated inside a .MOV file.

<<<-- Originally posted by Rob Lohman : Each DV codec is a little bit different, probably both in quality and
efficiency. On modern computers this shouldn't make too much
of a difference. And since native .DV on a Mac plays with QuickTime
as well I can't imagine a different codec is being used when the
DV stream is encapsulated inside a .MOV file. -->>>

One difference that I should mention is that Avid uses their own codec.

Yes and so does Sony Vegas (or at least you can choose) and
I believe even Premiere Pro is using another one. That doesn't
matter much to this story however. Playback will usually be with
the system installed codec (depends on how the footage is being
exported by the NLE). This thread is in regards to playback on
a computer outside of the NLE.

Rob,

I want to ask you something different. My cousin burned a few cd's with film on it. It has dvix codec but quiktime/ realplayer and windows mediaplayer on my mac wont play it... The codec is not avaible is what I get when i play it with quicktime. I just hear the film but I cannot see it... the film name ends with avi. (it plays fine on his pc and he has a pentium III 450,

thanks

Thanks Rob and Boyd for their contributions with this issue that has annoyed me whenever I try to show someone video on my Powerbook. Question: it seems to improve the look of all 24fps with 3:2 pulldown footage if I enable the "deinterlace" check box as well--is there any negative to doing so? And does this affect things if this clip is imported into FCP, or are these settings just for the QT viewer?

David...

Go to divx.com and download the divx player...your clips should play fine on it.

Charles..the deinterlace feature in the quicktime player is a "preview only" adjustment (like the high quality, and size adjustments)...it won't actually do anything to the data...just affects the display in QT player. No downside that I know of.

Barry

An aspect of this that is often overlooked is the video card in the displaying computer. DV video is 720 x 480. Unless you display an image with that number of pixels on the display (and not anamorpic video) resampling has to be done. The simplest form of this is just copying pixels and that results in clearly visible jaggies. More elegant resampling/interpolation schemes (bilinear, bicubic) make for a much more pleasing display. What seems to distinguish the high end cards is their ability to do higher order interpolation on the fly. Until I swapped out the video card on my Mac (dual G5, Studio display) I was quite disappointed in the quality of the picture when I tried to play back full screen. With the higher end card it's pretty impressive.

AJ: never had that problem on the PC, interesting!

Charles: as Barry indicated, these settings are playback only
UNLESS you save it with the movie (can be done with the player,
it should prompt for this when you changed something and then
close the player).

I believe both flags can be set when you export a movie (from FCP?)
as well, because I've received .MOV files that already had the
High-Quality flag already enabled.

David: DIVX with avi needs a codec as Barry explained. However,
you could also export to QuickTime (.MOV) with the MPEG4 codec
(same as DIVX) and it will play default on the Mac with a modern
version of QuickTime on it!

Rob...I'm pretty sure that when you save these settings in QT...its still just a playback or "preview" flag...there is no change to the underlying footage...yes?

barry

To the best of my knowledge that is 100% correct Barry! It's just
a flag (you can disable it again as well).

guys i hate to be a real dummy--but exactly what are artifacts---and what are those that are very undesirable--those to look for on the small monitor that will haunt you on larger screens?? bob mcree

Generically speaking an artifact is something that is added to an image as a consequence of processing it. Moire patterns from sampling and the blocking of the picture into "tiles" from DCT-based compression algorithms are typical examples. At the beginning of this thread reference was made to interlacing artifacts which aren't really artifacts but are just the consequence of the fact that computer monitors display both fields of a frame at the same time rather than 1/29.97th of a second apart as is done on a TV (NTSC). I too have noticed that these "artifacts" disappear when the high quality flag is not selected and the video is 60i from which I conclude that the difference between hi and lo quality is that only half the lines are displayed in the latter.

THANKS FOR YOUR REPLY BELIEVE IT OR NOT IT ACTUALLY MAKES SENSE TO A REAL DUMMY....