I'm sorry. I did not explain myself well enough.
Yes, the average bitrate can be changed, but the finished size of the files remains constant (I assume) at whatever size DVD (MB) is selected since there are no values between 4400 and 8100 that can be selected.
For example: If a three hour movie is encoded at an average bitrate of say 2500 to fit 4100 Gig, the quality will be fairly poor. If the average bitrate is altered to say 4500 but the size stays at 4100 Gig, quality will be lost.
If, however, the bitrate is adjusted to 4500 and the size of the resultant files is allowed to increase to say 5500 gig, quality will be improved.
Does this help?
Many thanks for your time.
That did help but still is very strange, pherhaps it is a bug Because DVD Size is also editable
you can put a different value ( other than those from the dropdown list )...see image bellow
put 4500 and
hit enter, because it is full editable
that should recalculate AVG Bitrate, which can also be changed after the new calculation
AVG Bitrate changes whenever you :
- change DVD Size in combobox, or editing and hitting Enter
- change Audio Bitrate
- change DVD Region
- select/ unselect audio tracks ( only in multi-tracks sources )
Hover your mouse over the controls and you will get a Blue Tooltip, it will inform you which controls are editable
Be aware that :
- excessive bitrate can give authoring errors, or playback problems
for example, Muxman ( a well known authoring tool ) is very sensitive in that matter
Old standalone DVD players with low buffer can't handle very high bitrates