Ah, OK. BD3D2MK3D uses the real (computer) sizes, as it should. A GB is therefore 1024 * 1024 * 1024 bytes. And your final MKV file size should be around 15,728,640,000 bytes. (BTW, the right column in your illustration should not exist. There is officially no KB at 1000 bytes, or mega at 1000000. The industry of the CD-R, DVD-R, BD-R had adopted these wrong values for commercial reasons only. But it's a lie, and no program should use these values.)
BTW, I did just two very rapid tests on a small clip. The duration of the clip is 0:03:24, and the audio file size is 4788 KB. When I ask for a target file size of 300MB, the computed bitrate is 11571 kbps, and the final MKV size is exactly 300.098 MB. Not too bad!
If I ask for a final file size of 1000 MB with the same clip, the bitrate is 39006 and the final file size is 1001.361 MB. I agree that the bitrate is slightly too high, but only a little. I'm not sure I need to try to obtain a better value. Computing the overhead is extremely difficult, perhaps impossible. I can't guarantee extremely accurate results.
I am currently encoding a longer movie, but even with the superfast preset, the two passes will take some time. I have requested a final file size of 10 GB (10240 MB in the GUI). I'll report the result tomorrow. If it is true that the final size is really too different, I'll try to improve the formula...
[EDIT]
Quote:
Originally Posted by thahandy
15GB = 1.536MB = 15.728.640KB = 16.106.127.360Bytes
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Correct.
Quote:
Originally Posted by thahandy
So in my case at the moment need to set it at 13969MB to get a output around 15.000.000.000Bytes
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If you want a final file size of 15,000,000,000 bytes, you have to compute the right number of
real MBs: 15,000,000,000/1024/1024 = approximately 14305 MB, not 15000 (and not 13969 neither).