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strange artefacts on exported HD Mpeg
Hi all,
I recently filmed a wedding and all looks fine as normal. However all of the dance floor footage (the raw footage of which looks fine) seems very pixelated and has an almost ‘overly compressed’ look when i export the 1080i HD MPEG (quality slider to 5).
The interview footage (filmed under better light and less gain admitedly) which is interspersed with the dance footage looks fine so I’m sure its not the export settings. However I just cant work out why the source footage looks ok but when exported the quality significantly drops.
I have tried upping the minimum bitrate slider and also exporting progressive (which resulted in the horrible horizontal lines throughout) but I just can’t sort this problem… Would it be anything to do with the fact that I probably had 15db gain on the camera (HDR-FX1) whilst filming?
I’ve used gain before and never seen such a quality loss (or infact any quality loss when I compare the exported HD mpeg with the source footage)
I’d love to get your thoughts on this…
Thanks,
David -
2 Replies
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Hi David,
When you say “Mpeg” do you mean H.264? Any compressor will have trouble with excessive noise since it relies on similarities in consecutive frames, but that should only result in blocking artifacts on lower bit rates. Could you post a screenshot as well as your export settings?
Vince Becquiot
Kaptis Studios
San Francisco – Bay Area -
Vince,
I was using the default premiere mpeg2 1080i setting (I think using a mainconcept encoder)
In the end I tried the same export on an older version of premiere and it exported fine…
Its a shame that I have cs4 and cs5 but I still keep falling back on good old 2.0 when I get in trouble!
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