The video part is compressed with MPEG-4, a standard that was developed by Moving Picture Expert Group (MPEG), while the audio is typically compressed using AAC compression. Video and audio compression are usually handled by different codecs (audiovisual encoders). MP4 files are typically smaller in size than other audio or video file types because MP4 files use a mix of compression technologies. They can also be opened with any text editor or XML editor in order to make minor changes such as modifying the file path of all the files associated with the project.An MP4, sometimes known as an MPEG4, is a multimedia file that is used to store video or audio data. PRPROJ files can be opened with Adobe Premiere Pro. They only contain references to all the media assets. However, PRPROJ files can aren't used for storing all the media content in the file itself. They contain information about all the video clips of a project along with all the effects, transitions and other video editing elements. PRPROJ files are created with Adobe Premiere Pro and are used for saving video projects. The first version was released in 1991 with over 10 iterations following until version 7 when Adobe rewrote the source code of the entire program and changed its name to Adobe Premiere Pro. The application is part of the Adobe Creative Suite of programs used for video editing, graphic design and web development. The PRPROJ (Premiere Project) file extension is associated with Adobe Premiere Pro, a video editing program with a timeline based workspace.
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