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UpRes losing frames?
I’ve sometimes noticed when I’m upresing on record from a Betacam (D600) component input to 720 record that the file seems to be losing some continuous motion.
If someone moves quickly or the camera moves, there is sometimes a little jump. Is this an artifact I have to live with or is it a problem that can be corrected?
I have to upres the file so that I can provide the client a 16×9 file from a 4×3 camera.Standard Def on the KiPro does not record in 16×9 configuration from a 4×3 camera.
Any advice on this would be helpful.
Thanks.
Michael Moser -
8 Replies
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What you might have seen is the video judder as the 50 or 60 interlaced frames are deinterlaced to 25 or 30 progressive frames?
And no the AJA Ki Pro does not loose frames -
That was what I was thinking, but is 720/59.94, by definition, progressive?
The input is definitely interlaced, but this may be the problem… -
As NTSC footage becomes 30P after deinterlace, the recorded signal could be recorded with double frames if the file is 60P. I have seen files like that before.
If you have a sample, and load it into an NLE, you could verify. -
I think what I’m seeing is the difference between 29.97 and 59.94. As an original SD signal there has to be an up-conversion and this is an artifact of that. Sometimes it’s visible and sometimes it’s not. Some people call it a feature, some a defect….
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It’s the nature of progressive footage when seen on 24, 25 or 30 frames.
Just like in Cinema one has to take care of panning the camera. Either slow or very fast.
Pan movements in between are not pleasant for the viewer. As they see the so-called ‘video judder’ of the background. In cinema is less visible as the DOF is set that the background is mostly out of focus. -
Hi Marc,
I expererience the same way with you. But i did in the contrary where i down convert 720p50 from P2HD to SD PAL in KiPro. At least we do the same thing, doing convert progressive to interlace ( or vise versa) and targeting different frame size.
I found motion artifact only on the LCD computer display, but not applied to all clips, as some other clips are OK. But if i play back the clip with high definition broad cast monitor or with SD CRT broadcast monitor, the clips are just fine.
Try this, play back the clip directly from KiPro to HD brod cast monitor.
Alex Desrial
MediaIntegra – Jakarta -
A LCD monitor cannot display interlaced signal like a CRT.
It will always show complete frames, therefore it is more visible indeed. -
I did a test with 1080i25 in and Convert and record to 720P50.
Looking frame by frame, the 720P50 file contains double frames as expected.
As it takes the two fields to de-interlace.
The de-interlaced footage looks awesome by the way.
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