Similar to quantization, certain information is deleted from the frame, but since it changes according to the amount of information in the frame, the image quality tends to be the same as that of quantization, and the file size tends to be smaller. It deletes (compresses) certain information from all frames of the video at a specified rate, and specifies the quality and deterioration degree with a numerical value from 1 to 100.
It can be expected, but it will take more time as the number of processes increases.
The "average bit rate" encodes while predicting the output result when converting, while the "2 pass average bit rate" encodes after first analyzing the data, improving quality and compression ratio. Is improved.Ī variable bit rate based on the bit rate (target bit rate) specified as a type of variable bit rate (VBR). Since the bit rate is changed according to the amount of information within the range by specifying the minimum bit rate and the maximum bit rate, or the target bit rate and the maximum bit rate, the quality is as long as the file size is the same as the fixed bit rate. There is no waste because the bit rate changes according to the amount of information to be transferred. Since the bit rate is literally fixed, waste occurs when there is little data to be transferred, and there is a possibility of shortage when there is a lot of data.
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