Since MPEG-4 is an open platform, companies and organizations can develop different formats according to the MPEG-4 standard. These technologies are based on G723, G728, MPEG-1 and MPEG-2. Then use video transform coding technology. (CELP, CodeExcitedLinearPredictive) coding technology and code rate above 16kbit/s. For example, 2~4kbit/s speech coding of 8kHz sampling frequency and 4~16kbit/s speech coding of 8kHz or 16kHz sampling frequency generally adopt parametric coding and 6~24kbit/s speech coding generally adopts code excitation linear prediction. The MPEG-4 study compares various existing audio coding algorithms and supports natural sound coding from 2 to 64 kbit/s. The MPEG-4 audio portion combines the synthesized encoding of audio with the encoding of natural sound and supports object features of audio. Compared to MPEG-1 and MPEG-2, MPEG-4 supports not only natural sounds (such as voice and music) but also synthetic sounds (such as MIDI). MPEG-4 includes the vast majority of MPEG-1 and MPEG-2 features and the strengths of other formats, and adds and extends support for Virtual Reality Modeling Language (VRML), object-oriented composite files (including Sound effects, video and VRML objects), as well as digital rights management (DRM) and other interactive features. MP4 is a set of compression coding standards for audio and video information. Part 2: How to Convert MP4 Video to Any Format on a Mac What IS MP4? More reading: The ultimate way to convert AVI to iPhone on MacĪiseesoft Mac Video Converter Ultimate is a dedicated video converting software for AVI users to convert various videos formats (including MOD, TOD, AVI, WMV, FLV, MOV, MKV, VOB, etc.) to iPhone format on Mac, so that you can watch more interesting videos on the go.Part 1: How to Convert Video to MP4 on a Mac You can get any-time length clips, crop video, customize output video effect and more to upgrade your digital life. Tip (Optional): AVI to iPhone converter Mac provides customers an excellent video editing system. Step 4 Converting AVI to iPhone MP4 Mac by clicking "Convert" button. Then click "Browse" to specify a location on your computer and open folder to check them later. Here you can select iPhone MPEG-4 format. Download Free Video Converter for Mac and then install it on you Mac.Ĭlick "Add Video" button on the tool bar, it lets you browse your computer to choose the AVI file you want to convert.Ĭhoose a proper format you want according to your device in the profile list on bottom.
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