Why is DV importing so slow?

So, I digitized about 50 of our old Video8 home videos on my iMac. iMovie doesn't support pass-through through a miniDV camera that I used so I had to use a program called Vidi to digitize each Video8 cassette into one big DV file (1 DV file per cassette of course).

Problem is that importing that big DV file into iMovie takes AAAGGEEESSSS. Why is that? It's a regular DV file that has nothing wrong with it. Any ideas?

Joshua.

Posted on Jun 5, 2007 5:53 AM

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13 replies

Jun 5, 2007 6:05 AM in response to Joshua Kaijankoski

My setup is:

17" iMac - 1.83GHz Core Duo - 1GB RAM
400GB internal HD - 300GB + 500GB external HD
10.4.9

I assumed that you'd assume that I knew my sh*te 🙂

So my setup should handle it. What is iMovie doing to the DV file when it's importing it? It can't be encoding it, can it? It has no reason to encode it as it's pure DV. Yes, I'm sure.

Joshua.

Jun 5, 2007 6:10 AM in response to Joshua Kaijankoski

"..It's a regular DV file.." ..yes, that's what it says on the Vidi website ..but I don't know..

Perhaps it'd be just as simple to import the Video8 onto a miniDV cassette, and then import the miniDV into iMovie - just a thought..

But you probably don't need to import your DV files into iMovie ..maybe you just need to place them into a project, and then iMovie may be able to instantly read them (..no instructions about this with Vidi?..)

So try this: create a new iMovie project, give it a name like "Test 1".

Then, in the Finder, Ctrl-click on "Test 1" (in your 'Movies' folder) and choose 'Show Package Contents'. When the 'package' opens, and you see the different folders inside, drop one of your DV files into the folder called 'Media'. Then close your Finder window, and start iMovie and Open the "Test 1" project.

iMovie should then find that DV file - er, in the Trash, I think - so drag it out of the Trash and drop it in the Clips Pane, or on your Timeline.

If it's a proper .dv file, iMovie should then be able to read, and play, it instantly, instead of having to "import" it.

If it can't play it, it's not a proper DV file, and you'll have to import in the usual way, during which iMovie will turn it into the right kind of DV file.

(..Maybe it's a frame-rate problem, or an NTSC vs PAL problem..)

Jun 5, 2007 6:36 AM in response to David Babsky

So try this: create a new iMovie project, give it a
name like "Test 1".

Then, in the Finder, Ctrl-click on "Test 1" (in your
'Movies' folder) and choose 'Show Package Contents'.
When the 'package' opens, and you see the different
folders inside, drop one of your DV files into the
folder called 'Media'. Then close your Finder window,
and start iMovie and Open the "Test 1" project.

iMovie should then find that DV file - er, in the
Trash, I think - so drag it out of the Trash and drop
it in the Clips Pane, or on your Timeline.


Perfect. You sir are a guru. Thanks a million.

Joshua.

Jun 5, 2007 1:17 PM in response to Donna Jones1

Your right it is the camcorder. As I have been researching a new camera to purchase, when I read their technical specifications some camcorders show that they support or do not support pass through.

If they do not say if they do, they don't...I would assume.

G4 Dual 1.25 GHz FW800, G4 Dual 1GHz (DUAL BOOT) Blue and White G3, and 2 Beige G3's Mac OS X (10.3)

Jun 5, 2007 2:09 PM in response to Donna Jones1

The camera definately supports pass-through as I succesfully digitized almost 50 tapes using pass-through, so there's no doubt about that.

What I discovered about iMovie 6 HD was this:

(from http://www.sjoki.uta.fi/~shmhav/iMovieHD_6_bugs.html#analogDV)
Some analog to DV passthrough converters don't work in iMovie HD 6.0.2 like they do in iMovie 4.0.1
1. For example, my Sony TRV320 can convert analog video to DV in passthrough mode in iMovie 4.0.1, but not in iMovie HD 6.0.2. Reportedly the same applies at least to Canon MV6iMC, Canon MV750i, too. This is why I still have a copy of iMovie 4.0.1 installed.
The same flaw was in iMovie HD 5.0.2, too: reportedly neither Sony DVMC-DA1, Sony DCR-PC110, Sony DCR-HC30E, Sony TRV-340E, Canon ZR80, Canon ZR200, Canon MV630i, Canon MV750i or Panasonic NV EX3 work in analog to DV passthrough mode to iMovie HD 5.0.2 while they work in iMovie 4.0.1 (apparently some models that don't work in iMovie HD 5.0.2 work in iMovie HD 6, though).
2. It is also not possible to record live DV with no tape in the camcorder (i.e. the camcorder in Rec mode, so that what goes in the camcorder's lens, imports in real-time to iMovie) from a camcorder (Sony TRV320, for example) to iMovie HD 6.0.1 because iMovie complains "Camera No Tape". In iMovie 4.0.1 and BTV Pro this works OK with no tape in the camcorder.
Analog-to-DV workaround #1: Import using $20/40 BTV/BTV Pro or iMovie 4.0.1. Then import it to iMovie HD or, to save time and HD space, drop the .dv file in the Media-folder (see below here and here).
Analog-to-DV workaround #2: (This worked with my Sony TRV320 with iMovie HD 5.0.1 but not anymore with v5.0.2 or v6.0). Put a tape in the camcorder and press the camcorder's PLAY-button to play the tape in VTR mode (usually the tape must be OUT when doing analog-DV conversion!), then in iMovie hit the Import-button (so iMovie starts to import from the tape), then press the camcorder's STOP-button. iMovie should then continue importing from the analog source as usual.
Live import workaround #1: Import using BTV/BTV Pro or iMovie 4.0.1. (Remember to disable the camcorder's demo mode).
Live import workaround #2: Put a tape in the camcorder and put it into CAMERA mode. Launch iMovie HD 6.0.2 -- its import mode should show the live feed from the camcorder. Remove the tape -- iMovie HD should continue to show and import live feed from the camcorder. The drawback with this approach is that it produces wear and tear to the camcorder. If you keep the tape in the camcorder, it may also go into standby mode if the tape is paused.


So apparently some cameras/decks do work. Another site directed me to Vidi which was a lifesaver. I spent about 4 days digitizing using pass-through. I can only imagine the pain having to record on miniDV first and then move it to the computer.

I tried those workarounds but they didn't work or wasn't able to try (BTV/BTV Pro ones). The camera I used was a loaner. It was a Panasonic GS50 I believe, PAL version.

EDIT: I got the "Camera No Tape" error all the time while trying pass-through with iMovie.

Joshua.

Jun 5, 2007 3:12 PM in response to Joshua Kaijankoski

What video format did you pick when you created your project (it shows it in the title bar, too)? Make sure it is DV!

The other day, I imported some DV clips into a project that I had started in iSight format by accident. That took ages. I suspect iMovie re-encoded the video on import to adjust for the square pixel aspect ratio and 640x480 iSight resolution (vs. 720x480 with non-square pixels for DV).

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Why is DV importing so slow?

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