RMVB is different from RM from the name presented. Rmvb with extra ívbí means Variable Bit Rate, whose format picture is much more clearer than those of RM of last generation. RMVB breaks the average bit-rate of compression which reduces the bit rate of still images to optimize the whole movieís bit rate, improve the efficiency as well as save resources. It applies higher bit rates to complicated dynamic picture while flexibly converted to lower ones in static image, and thus it finally gets the wonderful audio and video effect.

MKV is a common video file defined by Matroska Media, a new multimedia package format. The feature of MKV is that it could hold many types of encoded video, audio and subtitles stream.

To convert rmvb to MKV file, please install the latest RealPlayer if Windows has not installed it. Download RealMedia Splitter. Unzip the file with WinRAR, use the command line "regsvr32" to register it. Or download the bat file to Release folder to register. 

Download MKV Converter which can convert rmvb to mkv file. Then please install MKV codecs. Select a rmvb file, set some parameters such as DivX or XviD as the video compressor,  Microsoft ADPCM as the audio compressor, adjust the resolution, frame rate etc if necesssary.

APPLE TV could support both files encrypted with the FairPlay Digital Rights Management technology and photos with extension of JPEG, BMP, GIF, TIFF, and PNG.. Audio can be encoded with AAC, MP3, Apple Lossless, AIFF, or WAV audio codecs. Video could also be supported when itís encoded with either the MPEG-4 video codec for a maximum resolution of 720x432 (432p) or 640x480 pixels at 30 fps or the H.264 video codec for a maximum resolution of 720p (up to 1280x720 pixels) at 24 fps.

To convert APPLE TV to mkv means to convert quicktime/mpeg4 format video files to mkv file  normally. Please try to install the QuickTime Player and QuickTime Directshow filter. If the file is encrypted, the conversion will fail.

MPE is a kind of mpeg file extension.  Install the proper mpeg decoder first, then you can convert mpe to mkv.

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