iWisoft free video converter can convert any video and audio for all popular digital devices like iPod/iPhone/Apple TV, PSP/PS3, Zune, Pocket pc, Mobile Phone, BlackBerry, Gphone, NDS, Xbox, Archos, Creative Zen, iRiver and more. It supports almost all video and audio formats, including HD video, such as AVI, WMV, MPEG, MP4, FLV, MOV, VOB, Xvid, Divx, 3GP, AVCHD, H.264/AVC, ASF, DPG, DV, etc. video and MP3, WMA, WAV, OGG, AC3, AAC, CDA, FLAC, APE, CUE, M4A, RA, RAM, etc. audio.
With it, you can convert between any video or audio, rip video to audio, even convert video to picture files in GIF, JPG, PNG, BMP, Animated gif and edit video with crop $ trim video, add text or logo as watermark, add special effects. It's freeware, but it's designed with user-friendly interface that makes it easier to use.
I'll show you how to use it to convert mkv to avi!
You need to download and install iwisoft free video converter first. Then launch it.
1. Add files.
It supports two ways to input media files. You can click "Add" to input files in batches, or directly drag and drop files into its window in batches.
2. Set output format
Choose one file, click "Profile" drop-down button to select "avi" under "Common video" category.
Tip 1: If you want to change the output video and audio parameters, click "settings" to customize the parameters. It enables you to save your settings as user defined profile for future use.
Tip 2: You can click "Edit" to edit video, it allows you to crop, trim, add watermark, adjust gamma, brightness, contrast, saturation of the video. And you can preview the editing effect in real time.
Tip 3: While previewing video, you can click "Snapshot" button to capture video to picture files in gif, bmp, png, jpg format.
After settings and editing, click "START" to convert. You can mark "Shut down computer when conversion completed" or "Open output folder when conversion completed".
More info from http://www.easy-video-converter.com