Quality in new ffmpeg (solved)

[gui4ffmpeg]

In the gui4ffmpeg 2.1 files is a new ffmpeg included.
This makes some problems with the quality by encoding.
After some tests it is undependend from the compilation.

How to solve this issue:

You may play with two options:
qmin and qmax

The default in gui4ffmepg is:
-qmin 2
This is ok so far, but you have to add the option qmax.
qmax MUST be greater then qmin!
The quality will be worster by increasing qmax. In the
current ffmpeg the quality is without the option qmax
close to 30. This produces a very bad quality.
A good initial value is:
-qmax 5
If you have buffer underflows, you should increase the
value.

Anyway, some investigations are nessecary to find the reason
in ffmpeg.

[thymej]

I also noticed with newer versions of ffmpeg my bitrate, examle -b 6320, would show during convert as 6 kb/s (gui4ffmpeg v2.1). The outout mpg would end up being 300-1000k bitrate.

I now have to put a k at the end to show MB per-sec (-b 6320k), where on older version the k was not needed.

[gui4ffmpeg]

thymej

Great hint!!!

To use gui4ffmpeg 2.1, please add a 'k' after the bitrate in the
related field in the GUI eg:

6000 -> 6000k
or
900 -> 900k

In the next version of gui4ffmpeg i'll put this automatically in the birate parameter.