What is the bitrate of the mp4 video?
What I want to see clearly and occupy a small dot is now converted to rmvb video 512 audio 160K, is there any other way to set it?
The mp4 video bitrate is usually set to around 800. The basic algorithm is: bitrate (kbps) = file size (KB) * 8 / time (seconds), for example, D5 disk, the capacity is 4.3G, which takes into account different audio formats, is calculated as 600M, (so the remaining capacity is 4.3*1024-600=3803.2M), so the video file should not have more of 3.7G.
And if the video file capacity is 3.446G and the video duration is 100 minutes (6000 seconds), the calculation result: the bit rate is approximately equal to 4818kbps (3.446*1024*1024*8/6000=4817.857 ).
Bit Efficiency:
1. Bit rate in sound refers to the amount of binary data per unit time after converting analog sound signal into digital sound signal, which is an indicator to indirectly measure audio quality. The principle of bitrate in video is the same as in sound, which refers to the amount of binary data per unit of time after the analog signal is converted to a digital signal.
2. In channel coding, the source data block of symbol size K is mapped to a codeword of symbol size N through coding, and K/N becomes the code rate, where assumes that the symbol table before and after encoding does not change.
