whats a good variable bitrate for a two hour show or movie??

[kenmasters83]

currently using an mpeg 2 program with bitrate set at this setting.

variable bitrate minium 4700 to 8000 maxium..

is this bitrate acceptable or will the size get huge cause of the maximum of 8000???

oh and another thing this program i use insteaed it gives lower bitrates's than most programs the bitrate is off by a 100 points or so...

like 4700bitrate on the mpeg software i use is the equivalent to the this site bitrate's calculator of 4853 i think.

a bitrate of 4700 lgives me approximately 2 hours on my captures at a constant bitrate so will it be higher when doing variable bitrate captures of a high of 8000 and a minium of 4700??

[reboot]

Set average at 4700, and it should be the same.

[Abond]

Well, for variable bitrate beside max and min you must have also average - and this is the bitrate which will determine the file size for given duration.
It is relatively easy if you have a calculator (regular, not bitrate one )
simply: 1000 kbps for 1h of video
1. 1h=60min=3600sec (kbps is kilobits per second)
2. 1000kb=(1000x1024)=1024000 bits per second
3. 1024000 bits x 3600 sec = 3686400000 bits
4. 3686400000/8 = 460800000 Bytes (1Byte=8 bits)
5. 460800000/1024 = 450000 KB/1024 = 439,453125 MB - and this is the file size if you have 1000 kbps Constant bitrate or Average bitrate (min and max have here almost no influence, but it seems this is encoder dependant) for 1h of video. Yes, well the same can be done for audio - one should calculate both together and assume some overhead depending of the aim to determine the file size. Everything of these considerations and math is taken in account by Bitrate calculator - it need to know the duration and the audiobitrate to give you the video bitrate. So if you want try to make a bit math, experiment a little and... use bitrate calculator

[kenmasters83]

the program i use is mainconcept pvr.

there is only a minium and maximum and thats it i tried it with 4700 min and 8000 max and the file size was the same but the capture looks identical and lossless and a tad sharper and i cant even see no macroblocks or anything on my crt monitor i see a difference between the two now..

i got it all setup now.