Image areas with high levels of movement are compressed with a higher bitrate than static areas with little movement. Modern video codecs such as H.265 and H.264 work using variable bitrate encoding, which analyzes the image in terms of adjustments to its contents, and compresses the image according to its content. Here, it comes down to the "average bit rate" and "maximum bit rate" in particular.
MP4 COMPRESSION RATE SETTING MP4
If an MP4 file created using a camcorder contains more than 25 fps, it's best to lower the fps value to 25 in order to reduce MP4 file size.īasically, anyone who wants to make an MP4 file into a smaller size – for streaming it on a website, for example – should lower the resolution and frame rate of their source material to compress their MP4 video.Īdditionally, you can compress MP4 files by adjusting MP4 codec values, or more specifically video codec values, since video images are what takes up most of the space in an MP4 container. 25 frames per second is sufficient for most cases.
MP4 COMPRESSION RATE SETTING FULL
Therefore, if you want to show a large full HD MP4 on your smartphone and need to compress it for this purpose, it makes sense to reduce its resolution.
Full HD resolution, for instance, contains 1920 x 1080 pixels, while Ultra HD has 3840 x 2160 pixels. If you want to display the video on a large HD monitor, you need a higher resolution than the resolution required for a smaller smartphone display.
MPEG-2) can also be used for MP4 files too.Ĭompressing MP4 video to smaller size is usually associated with a reduction in quality, since this is the only way to create video files that are small enough. The most important codecs for MP4 are H.265 or its predecessor H.264 for video data as well as AAC (for audio data). MP4 is a file container for digital video that lets you compress video data using codecs.
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