1. Image quality (such as normal, fine, ultra-fine, etc. )

2. The resolution of the video (for example, 320X240 800X600 1224X768, etc.). )

3. The number of video frames (such as 12+24, etc.). )

4. video format (AVI RMVB, etc. )

2. To give a few examples: 320X240, high quality, 24 frames and 30 minutes of AVI format is about 60M.

30 minutes 1024X768 high-quality RMVB format is about 200M.

3. Mobile video takes up less space (the general format is 3gp). A 30-minute 800X600 video is about 80M. Because there is no accurate data (as above, 1~4), it is impossible to make an accurate judgment! You can also try it in 1 minute and then multiply the file size by 30!