You downloaded a video and dumped it into itune, only to find the movie plays fine on your computer, but won't play on Apple TV? You want to play more music and movies on Apple TV but are afraid they are incompatible? Your Apple TV gets corrupted, frozen or rebooted for no reason? Or you have some video Podcasts and would like them to appear with others as "standard" videos instead, so they can be in video list for playing later? For most of cases, one factor should never be ignored, that is, ATV users are required to clearly understand what audio and video formats ATV support and what source media formats you want ATV to play. In short, compatibility is the key.
Apple TV converter bridges the compatibility gap. All the popular video and audio formats that mostly seen or heard of, such as WMV, 3PG, MOV, VOB, MPG, ASF, FLV, AVI, RM, RMVB, MP4 and MKV are supported and can be converted to Apple TV compatible format. Apple TV video converter also supports converting various audio formats for ATV. One more thing, RMVB to Apple TV converter can take snapshots from the video; you can get the most beautiful views from your video collection and organize then playback on your Apple TV.
Apple TV converter also enables you to convert various videos/audio to iPhone and iPod compatible formats. Things will be easier if you finish reading the tutorial below:
RMVB to Apple TV Tutorial
Step by step on how to convert RMVB to Apple TV?
Step 1: Click here to download, install and then run iorgsoft RMVB to Apple TV converter

Step 2: Select a file (video or audio) to load input info
To load file info, click Load File button. As it supports batch conversion, you can select more than one task to convert. You can also rename the output file in the Designation File column

Step 3: Settings

Click the Edit button to edit effect (Brightness, Contrast and Saturation).
To select a part of the video/audio to be converted, hit the Trim button to define the start time and ending time.

Set the output destination and format for the resulting file, you can also choose the type of subtitle. For more settings click Setting button to tune the video/audio parameters like frame rate, bit rate, resolution, etc.
Step 4: Start conversion

It takes a while to finish the conversion process; the time varies from different settings and the file size itself. If you don't want to take time to wait or have no idea when it finished, fine, it allows you to automatically shutdown the computer after conversion or opens the output folder after conversion.