MP4 Quality and Target File Size

Quality and Target File Size only apply to MP4, not AVI or GIF.

Quality

For MP4, Quality controls the average bitrate the encoder should aim for when encoding video data. This is an upper bound and has been set very high, with 100% Quality corresponding to a bitrate of 100 Mbps. If the encoder detects that a smaller bitrate will suffice for optimal image quality, it will make this adjustment automatically. It is rare that you will need to interact with this slider for MP4 output.

In D3PLOT the default quality is set to 90%. File size will be broadly equivalent to the size of the JPEG x the number of frames in the animation.

Target File Size

Sometimes it is desirable to request a target file size for video output. If you select the Target File Size option, it will be used instead of the Quality control. Enter a target file size in megabytes – the bitrate is adjusted automatically to achieve the target file size. Because of the nature of video encoding, actual size of the output file might be smaller than the target file size you request.