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How To Convert MPEG4 M4V to MP4
OJOsoft Total Video Converter provides various video conversion controls, such as convert M4V file to MP4 format
M4V – MPEG-4 video file format
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About M4V to MP4 Converter 
OJOsoft Total Video Converter provides various video conversion controls, such as convert M4V file to MP4 format, it helps you convert your favorite M4V movies better, making them smaller and faster to converting and without any harm to your output video quality as possible as it can. The powerful software includes a set of inbuilt audio/video codecs in order to let you convert to MP4 format from any other popular video formats, such as TS, MPEG, ASF, etc.
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AVS Video Tools also has the same function, you can download it from the URL below:
Note:
The above downloads are the downloaders from Regnow of Digital River Inc (Nasdaq: DRIV). When it is running, the firewall on your computer may popup the request for Internet access. They have been tested and are 100% CLEAN.