Hello,

The same problem here, two types of video files and none of them importing. Up till now I have tested some scenarios and none seems to work.

First about the configuration, video files and then about the steps taken:

Configuration:

1. Hardware: laptop Dell XPS L501x, Intel Core i7 740QM QuadCore, Corsair 8 GB RAM, 500 GB HDD 7200 rpm, nVidia 435M 2GB DDR3 Video Memory

2. Software: Windows 7 Home Premium 64bit SP1, Adobe Photoshop Lightroom 3.6 64bit, Adobe Photoshop Lightroom 4.0 beta 64bit, Adobe Creative Suite Production Premium CS 5.5, Apple QuickTime 7.7.1

3. Video files: AVI HD 720p 30p filmed with Olympus EP-2, MTS Full-HD 1080p 24p filmed with Panasonic GH-2 (with and without firmware crack), MTS Full-HD 1080p 50i filmed with JVC Everio GZHM445BE (folder size 100 GB, file sizes between 4 MB and 4 GB, video lenght between 1s and 15 min). All video files behave as expected in Premiere and After Effects and as a test I have imported all the videos in that folder in a new Premiere project without any issues.

Steps taken:

1. Import folder in LR4: shows no file preview, after 1 hour nothing imported. Close LR4.

2. LR3.6 won't start. Open Task Manager: memory footprint of LR 3.6 peaks at 150 MB. From Task Manager killed both dynamiclinkmediaserver.exe and dynamiclinkmanager.exe, LR3.6 exits on it's own.

3. In LR4, select to import one file of each type, after 30 min nothing imported. Exit LR4.

4. Repeat step 2.

5. In LR3.6, import one 720p 1 second AVI file (4 MB), preview normally, close. Open LR4 beta, tried to import the same AVI file, fails. Close LR4. The AVI plays normally in QuickTime, Windows Media Player, VLC and I can import it and work with it in Premiere and After Effects without issues.

6. Repeat step 2.

7. Start LR3.6 normally, make some adjustments on a photo. Close LR3.6. Open Lightroom 4 beta, make some adjustments on a photo, close LR4. Restart LR3.6 normally, make some adjustments on a photo. Close LR3.6.

As soon as I try to import video, dynamiclinkmediaserver.exe oscilates for about 10 minutes between at 8 and 24% CPU usage and 60-125M memory footprint, then stabilizes at 13% CPU usage and around 83 MB memory footprint, dynamiclinkmanager.exe is always at 0% CPU usage and 8668 K memory footprint. The values here are as read from the Task Manager.

The two background dynamic processes won't terminate on their own after LR4 is closed on video import on both end application scenarios: cancel import and close LR; close LR, warning about import process running, ok to cancel, LR exits. These processes are only activated on video related tasks, as seen from the last step.

Hope that helps,

Cristian

Message edited to add more details about the video file specs, steps taken and behaviour of both versions of LR.

i have the same problem. 

Nikon d300s

windows 7 professional 64

no video files recognized when attempting to import.

error message "dynamiclinkmediaserver.exe has stopped working"  once i closed the dialog box all my video files change from the video icon to "preview unavailable for this file"

do you guys check if 'Adobe QT32 Server.exe' process is running in task manager when Lr do importing video?  if not, you can launch it by explorer manually:  it locates "C:\program files\Adobe\Adobe Photoshop Lightroom 4\Support\DynamiclinkMediaSever\dynamiclinkmediaserver\1.0\Adobe QT32 Server.exe. 

PS: make sure all three processes Adobe QT32 server.exe, dynamiclinkmediaserver.exe and dynamiclinkmanager.exe are running.

how about kill all thress processes and relaunch lightroom?

Have similar problems.

When importing videofiles: it seems importing is under way, but nothing happens. After killing process dynamiclinkmediaserver Import pop-box appears with the message: There is a problem with the video file followed by list of video filenames.

Restarted LR 4, killed process dynamiclinkmanager. When synchronizing folder some .mov files were imported, but LR 4 refuses to import .avi files.

When trying to work on the .mov files in LR 4 there is a message saying: There is an error working with the video. After restarting  LR 4 the videos are accessible!

I have not succeeded to import avi files, so there seems to be a major problem with handling of videos.

Video files will not import into Windows version of LR4, even an isolated AVI on my desktop. There is a major bug here.

I don't get that message. The video import just stalls and doesn't import files.

i do get the dynamiclinkmediaserver.exe has stopped working message.  I also have the newest version of  qicktime.

Followed your instructions 3x…it allowed me to import 1 file then crashed.  I restarted the program and tried another experiment.   I used my Kodak zi8 to record several 10 second videos.  Had no problem importing them from the sd card.   But when I tried to import my dslr clips it crashed again.  When I say crashed I mean the error dialog box appears with the “dynamiclinkmediaserver.exe has stopped working” message

Intel core i7

Searching for information about this problem led me to this thread.  I'm both happy and sad to see I'm not alone with this issue.

I see the same behavior -- I cannot import (via import or folder synchronize dialogs) *any* video (multiple types, including Canon P&S .avi, Nikon DSLR .avi, Kodak Zi8 .mov, etc.).  The original copies of all of these are correctly manged in LR3 (I made a unique copy to experiment with LR4).  I am attempting to import in place using files on a local hard drive ("adding" to catalog, not copying or moving).

Attempts to import appear to hang and cause dynamiclinkmediaserver to spike and maintain constant 50% cpu utilization, and imports remain hung (I have left them running as long as an hour) until I kill the dynamiclinkmediaserver process.  After killing dynamiclinkmediaserver, I receive either "unable to import files" or "movie files contain no video frames" error messages.  I have the latest Quicktime version installed.I have cleared the video cache, re-installed Quicktime and rebooted with no change in behavior.

Processor is Intel Core2 Duo T7500 (2.2GHz), running Windows 7 64-bit with 4G RAM.

If there are additional suggestions or more information needed, I will be happy to try and/or provide it...