[XviD-devel] xvid
Stefan De Laere
stefan.delaere at dzine.be
Thu Jun 18 14:29:38 CEST 2009
Hi,
I'm currently experimenting with xvid 1.2.2, and an AXIS 209FD network
camera. I'm receiving the video stream over the network using RTP-MPEG4
elementary video, and I feed this stream to the xvid decoder.
What I observe is that I-frames are correctly decoded, but P-frames are
decoded with artefacts, some kind of smearing, blurriness. Each time an
I-frame is displayed, the video is sharp and then all following P-frames
create blurriness and artefacts.
If I change the resolution of the camera to 320*240, the problem
disappears an xvid is decoding the elementary stream without problems.
Some questions:
Is 640*480 a resolution which is allowed in MPEG4 Simple Profile or
Advanced Simple Profile?
Is this a known problem ?
Are there any settings that need to be changed in order to get a good
picture ?
Is is possible that the MPEG4 produced by the axis camera is not fully
MPEG4 compliant ?
Where in the xvid sources should I look If I want to solve the problem ?
Thanks in advance,
Stefan
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