What cause blocky images

[jigarmehta]

I get blocks of data missing like this every so often....any thoughts

http://www.mehtafilms.com/images/screengrab.jpg

[Barry_Green]

That's a tape dropout. Sometimes you can recapture that same section again and it'll capture properly, but sometimes it's scrambled when it's recorded.

It happens when the data on the tape somehow gets garbled in one section -- whether by a fleck of dust on the recording head, or a bit of magnetic material flaking off the tape or whatever.

[DavidBeier]

This kind of thing apparently has been happening with the Firestore 100 as well. Currently it would seem the best way to avoid it is just use P2s (anyone had dropouts with them yet?)

[Green Hornet]

In another post, they verified that it can happen on a mac due to the mac converting the file from it's native fat 32 file to the mac's file format. It's not a direct = conversion process all the time, so you may have to re-do it.

A workaround it to "clone" the original files, not drag and drop, that way they stay in the same format.

[KCFilms]

Check your firewire cables too. I had problems (similar to the picture above) with Final Cut importing directly from the camera's P2s until I switched out firewire cables.

[jigarmehta]

This is material captured on a p2 card and then brought into final cut vis the PCMCIA slot...

...so it is not the camera or the card, but the injest?

[Owen]

Play it back in the camera off the P2 and see if the blocks are there at that stage of things.

[KCFilms]

Check out this thread, it may hold the answers you're looking for:
http://www.dvxuser.com/V6/showthread.php?t=57651

[Barry_Green]

...so it is not the camera or the card, but the injest?
That's my understanding, yes -- the footage should be perfectly fine on the card, but something's getting corrupted during the ingest to FCP.

It's the exact same thing as a tape hit, a tiny bit of the data is being corrupted. Several people have reported better performance when using a different firewire cable.

[allenjhart@aol.com]

Out of 39 minutes of DVCPROHD(720 24P) recorded this last Saturday on FS100 there are over twenty single frame glitches such as these.....Some worse than others but regardless those takes are unusable...those glitches that were more severe also had a pop in the audio........FS100 was securely mounted to Chroziel riser, strain relief at both ends of firewire cable.......camera was slowly panning and tilting on Sachtler 20 in all shots....HVX connected via s video cable to battery powered Sony 9L3.......certainly not an FCP problem since these glitches could be seen on playback from FS100 to HVX200..... the HVX performed flawlessly with no glitches from the material recorded to P2 card........although I spent nearly 2g for this unit I cant recommend it to my clients

[Brentmeister]

Have you tried checking the files out on a PC based edit system...just to see if its a mac thing like a previous poster suggested. Im having the same issue...and i dont have access to an avid or canopus etc.

[allenjhart@aol.com]

glitches were seen on location played back to the HVX200 from FS100.....these glitches have nothing to do with any NLE, they happen between the HVX200 and the FS100