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I've a .MP4 file. I know MP4 file has some attributes such as: general bitrate,file size. Video: Max bitrate,min bitrate,avg bitrate,size Audio: Max bitrate,min bitrate,avg bitrate,size I want to get the size(or maximum size) per minutes from above attributes. Can anyone help me?

Thank so much

The Bird
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2 Answers2

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Here is an online video-file-size calculator, you can specify your settings, and run it:

http://www.dr-lex.be/info-stuff/videocalc.html

VincentZHANG
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If the average bitrate is in bits per second (I think it is?), then you can get the "size per minute" like this:

 sizePerMin = 60 * avgBitRate

Which will be the size per minute in bits. You can do similar for the max and min size per minute.

joshuahealy
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  • thanks,but some videos,we get the max and min bitrate are Undefined,only avg bitrate.I've tried with avg(or general bitrate of video,but it is wrong.I calcuted size/min = 5Mb,i write 5Mb but the media player can plays only 25seconds first.I think sizePerMin = 60*avgBitRate is wrong.Thanks – The Bird Mar 30 '12 at 04:58