I agree that if 'No Audio' + 'Video->Lock FS' is the same as 'No Audio' + 'Overall Size Lock', but even if the over all size is locked one should be able to adjust in example Frame rate to see which frame rate will result in which average bit rate.
I agree that if 'Video->Lock FS' + 'Overall Size Lock' is enabled the 'Total Audio Bitrate' is not allowed to change but the audio bit rate for different streams with different bit rates should still be able to change,....
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Video->Lock FS disables the whole Video section, shouldn't one be able to:
- change the Frame rate which should then change Bitrate and Quality Factor ?
- change the Width&Height which should then change the Quality Factor ?
- change the File size indication type Byte,...MB, GB.. ?
Yes, be able to. I will look these.
Impossible calculate "Bitrate" or "Quality Factor" from "Width", "Height" and "FPS" values with fixed file size. At least, impossible for me. If someone know how to calculate this, and show me, then I will be able to add this feature.
Impossible calculate "Bitrate" or "Quality Factor" from "Width", "Height" and "FPS" values with fixed file size. At least, impossible for me.
If someone know how to calculate this, and show me, then I will be able to add this feature.
and you got:
a. a file size (in bit) FSIZE
b. width W and height H (each in pixel)
c. frame rate (in frames per second) FPS
d. a length (in seconds) LENGTH
the file would have: LENGTH*FPS*WIDTH*HEIGHT pixels (=PIXELS)
So the bit per pixel would be FSIZE/PIXELS.
-> bps = FISZE/(LENGTH*FPS*WIDTH*HEIGHT)
Then, control of program will be very hard and open for invalid results.
1 hour video (1280x720 23.976 fps)
QF = 0.11 => Bitrate = 2431 kbps => Video File Size = 1093950000 byte
If Lock "Video File Size" and change "Width = 320, Height = 240":
QF = (1093950000 * 8) / (3600 * 23.976 * 320 * 240) = 1.32
Bitrate = (320 * 240 * 23.976 * 1.32) / 1000 = 2431
And always bitrate nothing change. That is to say, if video file size fixed, then bitrate cannot change...
Okay, if it's to hard for you to detect and protect against invalid results, I just was wondering why the program is the way it is atm.
"And always bitrate nothing change. That is to say, if video file size fixed, then bitrate cannot change..."
-> yes, if the length and the file size does change neither can the bit rate,..
The point is that the bps value is another matter, because it will also change if either the resolution or the frame rate changes,..
"Bitrater 1.2 Beta 6" version released.
Last edited by Hikmet; 4th Jun 2013 at 03:48.
Hello,,If your calculator used the correct aspect ratios determined by bits per pixel (anything above 0.250 bits per pixel is perfect IMO) you could dump most of the other settings on your calculator..Selur is correct in what hes trying to tell you..I really appreciate what your trying to achieve here and you fellas know alot more then me,,but as a laymen I know what calculations should be after 17 years of encoding files and I have used many calculators over the years..The only one that was really thought out but has not been updated since 2005 was this one https://www.videohelp.com/tools/Aspect-2 If anyone could make this the foundation for a modern version no other calculators would ever be needed again..Thanks and keep up the good work...~
"Aspect Ratio" config maybe will add next version. In your example program, user cannot change QF. But, QF is constant value for video quality. Example, I'm usually use 0.11 QF for H264 encode (if no noise). And this QF value always help me calculate true bitrate value for my need. And in program, user cannot change width, height, or anything, only can select in list. This is not true way for me.
Last edited by Hikmet; 4th Jun 2013 at 04:05.
Program cannot need all values.
No, problem I just thought this would solve the "cannot need all values"-problem.
Thank You for helping me out,,quality factor is bits per pixel in your calculator (it was staring me right in the face lol) and I am glad I can change your values because it seems your default guality and the dropdown values are based on finished file size..As I stated before any value under 0.250 bits per pixel and that is after all overhead is factored in does not give you a good enough finished quality file in my opinion..And I hope you make good on incorporating a good set of aspect ratios or a optimum width and height based on video length,bits per pixel and audio overhead..The program as it stands right will serve me well for all my video calculations....THANKS...~
Thanks for sharing your knowledge, creating this excellent program