TUTORIAL INDEX
Post 01 - Video Captures (MP9, MP10, MPC, BSPlayer, VLC, PowerDVD)
Post 02 - Image Joiner
Post 03 - Video Captures (Media Player Classic)
Post 04 - Video Captures (ImageGrabberII)
Post 05 - Joining Multi-part Downloads (HJ Split, WinRAR)
Post 06 - Thanking Posts (Hide Links Tool - Post 18)
Post 07 - Protecting Download Links
Post 08 - How to Post in the Forums (video)
Post 09 - Video Players and Codecs (GOM, VLC, K-Lite Mega Codec Pack)
Post 10 - Uploading Images and Posting Thumbnails (Imagevenue)
Post 11 - Starting and Subscribing to Threads
Post 12 - How To Add A Signature Image
Post 13 - Show Concise Video Info (Medianfo template)
Post 14 - How to arrange pictures horizontally
Post 15 - Batch video captures with movie thumbnailer (mtn)
Post 16 - Hide Links Tool
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SCREEN CAPTURES

note:
By far the quickest & easiest way to make & stitch screenshots in one operation is the free imagegrabber2 - http://www45.brinkster.com/antworkz/ install & use that & you'll not need to worry about reading the rest of the info below unless you have an unsupported clip, it does support most.

Windows Media Player 9

If you are using Windows Media Player 9, pause the video at the scene you wish to capture.
Press Ctrl+i (that's control key plus letter 'i'). Think of the 'i' as "image."
The "Save Captured Image" dialogue will open up. Choose the folder you wish to save the image in -- choose the file type (either JPG or BMP) and give it a file name (default name is "capture.") Click on "Save."
If you plan on doing any further manipulation of the saved image it's best to save it as a BMP to retain the original quality. You can use Paint (or other app) to save it as a JPG later

You can't take a screenshot if the program is using overlays to display the picture.
In windows media player you can disable overlays and screenshots will work, I recommend you re-enable them afterwards.
Tools>Options>Performance Tab>Advanced -- uncheck "use overlays" if it is checked. If that doesn't work, turn video acceleration all the way down.

Windows Media Player 10

Guess what? It's exactly the same procedure as WMP 9.

Media Player Classic

This is NOT a Microsoft product -- it's open-source (free) and works very well even though it looks like the old MS Windows Media Player 6.4. It's easy enough for beginners yet has options and features for the more advanced user. Get MPC from: http://sourceforge.net/projects/guliverkli/
On that page you will find it under the "Latest File Releases" with a "Download" link.
1. When you load the video in MPC pause it and go to [File], [Save Thumbnails].
2. A dialog should popup In the dropdown box where it says file name, choose whatever you want or use the default name
3. Set the file type to .jpg - .bmp images will not upload here
4. For the thumbnails options select however many rows and colums you want for the screenshots. The product of the columns and rows will tell you how many screenshots will be taken i.e. 4 rows x 4 columns = 16 screenshots
5. For image width, though the PreUpload page states 800 px should be the maximum width but you can go as high as 1024 px without causing too much trouble for users here
6. Referring to 4 and 5 - you should bear in mind the wider the image you make and (to a lesser extent) the more rows/colums you make, the larger the file size will be and remember you can't adjust quality. It's best to do no more than 8 rows by 8 columns for 800 px wide pictures and 6 rows by 6 columns for 1024 px wide pictures to keep under 256 KB . If you plan to use a different imagehost you can make the image wider and have more rows and columns.
7. Click [Save]
8. Depending on the length of the clip and your processor speed, it will take between a few seconds and 5 minutes to scan the video and produce the screenshots
NOTE 1 - you can't manually pick the frames you want, the only option is to adjust the number of rows OR columns to alter the number of images it shows and as a result your shots will differ
NOTE 2 - you get the "GetCurrentImage hr=8000ffff" error, you need to change the Playback Output. Go to [View], [Options], [Playback], [Output]. If the file type is .avi, .mpg or .wmv change the DirectShow Video button to "VMR7 (windowed)" or "VMR9 (windowed)". If the file type is .rm or .mov use the "DirectX 9" option. Now click [Apply] and screenshots now work.

BSPlayer

BSplayer is a free Windows player that plays back all kinds of media files
(avi /mpg /asf /wmv /wav /mp3 /ogm ) and specialises in video and divx playback.
Get it here: http://www.bsplayer.org/
By pressing Shift + P, BSplayer captures at the resolution you see the movie (what you see is what you get).
The button P captures at the movie's original resolution according to their Web site -- but I don't see the difference myself although I've only used it
infrequently. Whichever you choose, the image is saved in the same directory BSPlayer resides in and uses the filename format of 'bscap000.jpg' with each successive capture increasing the number by 1.

VLC Media Player

[Ctrl+S] to bring up your preferences, click [Video] and under "Snapshot", choose a folder to save screenshots and save them as .jpg format. Now click [Save] then [OK]. Now when you play the video in VLC, just click [Video] in the menu then [Snapshot] and the screenshots will be saved in your snapshot folder and voila!

PowerDVD
Click the camera icon.

ATI Media Player
If you have an ATI video card, you might have this.
Same as PowerDVD -- Just click the camera icon.

Other Screen Capture Utilities

IrfanView
Free for non-commercial use only.
Available at: http://www.irfanview.com/
Does a lot of stuff -- kind of like a Swiss Army Knife.

FrameShots (Formerly known as "SnatchIt")
Not free. Available at: http://www.frame-shots.com/
.