Jon Barrie
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The camera’s heads could be dirty or have some static too. Run a cleaning tape.
How long are your captures?
Jon Barrie
Jon Barrie
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What you are experiencing is dropped frames but in GOP (group of pictures) so if 1 frame drops you lose the whole group which could be about 12 or 13 frames.
The reason this happens is because the HDV codec is made up of these GOPs.
Dropping frames can occur when a system is not fast enough in CPU or HDD read write speeds. These two areas can lose performance when running another application or capturing to the same drive as the OS and Apps.
Best practice with capturing HDV is to start the capture process and don’t touch the computer. Make sure the capture drive is a fast one 7200rpm minimum USB2 external works as minimum. Butthe mist important part of any video editing system or laptop is to disable by power saving settings like screen blank or off and HDD sleep modes or CPU voltage. Make absolutely sure it is all set to always be on and never sleep after X amount of time.
Good luck.
– Jon Barrie
Jon Barrie
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Check this video tutorial
https://www.youtube.com/watch?v=xMx0YIZGN1Q
Done with CS3 but process is the same.
– Jon Barrie
Jon Barrie
aJBprods
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Is it possible there was an update run on your QuickTime. Apple sometimes can run an update and you may not have noticed it.
What version of QT does it state in about?
– Jon Barrie
Jon Barrie
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Have you tried to import into an adobe only preset sequence?
Are you working specifically with xdcam or xdcamHD they are different. CS4 doesn’t support the xdcamHD version, CS5 does. CS4 with work fine with xdcam (which is still HD footage).
Jon Barrie
Jon Barrie
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Perhaps mov the mp4 files to a new folder and relink them when opening the project. It may need to index and conform them all again but that should clear it up.
Have you tried to bring the mp4 clips into a new project? Are you sure they are working in a solo capacity?
If they work on their own moving them to another location on the drive they should reconnect and rebuild ok.
Let us know.
Jon Barrie
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I have just had a look at the specs of your camera. It would appear the SD 4:3 recordings are in MPEG-2 @ 9MB/sec.
I would think you’re quality loss is due to the fact that you are working with a heavily compressed signal in the beginning. I am sure the picture looks great when you edit, but when you export to DVD (lets say) you are compressing the compression, which is taking a signal that is about 1/5 the quality of a DV signal then compressing the blocks of broken down colour and taking it from 1/5th the quality to about 1/5 of that again. It’s very crude math here but the picture I want to paint is that you probably cannot get as clean a compressed export as what you went in with – just the nature of compression, especially MPEG-2 compression.
For editing I would probably test with a standard DV preset, make a custom preset which matches the preview format as MPEG-2 or convert the footage into DV, which again makes it compress compressed footage which will only compress again on the way out…
The best export you could expect is to have the MPEG-2 DVD compliant MB/sec run as high as possible (7.5 CBR – MAX at 8CBR, but some DVD players may not keep up) with the correct field dominance in place. Footage is upper or lower so should the editing sequence used and the export settings too. Deinterlacing or making an interlaced signal into progressive with soften or make jaggy edges, seen at its worst on text. Try a test with the maximum quality setting ticked too. It takes much longer to export, but you may find it saves the quality you feel is missing.
Didn’t mean to depress you, but there is just some truths about video that need to be told.
– Jon Barrie 🙂
Jon Barrie
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Patience my fellow editors…patience. 😉
Jon Barrie
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Just to correct the last post on this. Premiere Pro CS5 does edit AVCHD natively and very well. CS4 was the first version of PPro to work with AVCHD. it did have many teething problems then, but in CS5 the AVCHD codec is imported and edited with the need to be converted. You will need a machine that runs close to the high end recommendations. As always the video products will perform best when running on a system built to adobe’s top end system recommendations.
– Jon BarrieJon Barrie
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Short answer. No.
You will need to feed your signal + the BG video/image through a vision switcher that has a keyer function for a live key. Nothing I know of captures an alpha channel. Hence the concept of chroma keying.
– Jon Barrie
Jon Barrie
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