You should double check the characteristics of input content.
If you are trying to convert 22KHz audio, it is useless to make it 44KHz!
44KHz is a "maximum" value.
Same goes with video framerate. If the source is 30fps (or 29.9), go for 15. If the source is 24, go for 12! This is by the way an issue with iriverter, you need to create a special profile to change the target frame rate.
And if the source is 10 fps, it is even worth to make it 15
