On 11/13/07 00:28, Reinhard Nissl wrote:
Hi,
Reinhard Nissl schrieb:
Yes, they are smooth for a brief moment, and then get jagged.
I recall this behavior when I had a FF card for testing. Maybe it's a feature to stop flickering one pixel high horizontal lines in still images by doubling one field of the frame. Maybe there exists a switch to turn this feature off.
To prove the above mentioned behavior, please try this synthetic file:
http://home.vrweb.de/~rnissl/radio/field_test.mpg
Actually, it should display like here: http://home.vrweb.de/~rnissl/radio/field_test.png
But if the above is true, you'll get some heavy flicker on TV and then it will split the screen into a top and bottom half where one half will be white and the other one black. This will happen when the FF card decides to display just a single field of the frame.
When I display field_test.mpg via DeviceStillPicture() on my FF DVB card I see a picture that has a top and a bottom half that rapidly flicker black and white (top black, bottom white and vice versa).
After like half a second the picture gets static, and the top half is solid black, while the bottom half is solid white.
I never see anything like the field_test.png you posted (with alternating black and white lines).
Klaus