A widely used digital multimedia container format used to store video, audio, and subtitles.
A popular universal audio driver for Windows that allows audio interfaces without native drivers to achieve low latency. Oasivdmp4
Based on similar terms, it may be a typo or a combination of several related concepts: A widely used digital multimedia container format used
Features and Comparison of AVCHD™ and MP4 Video File Formats a specific piece of software
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"Oasivdmp4" does not appear to be a recognized technical term, software, or standard file format in the current digital landscape.