The mystery of the "grainy" picture

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tonyjer
Posts: 196
Joined: Thu Mar 03, 2005 12:41 pm

The mystery of the "grainy" picture

Post by tonyjer »

Hi Everyone

Just captured 70 mins of footage (DV type 1) and succesfully burnt DVD (PAL format at 6000Kbs)

What mystifies me is why the picture is distinctly grainy and dark in some chapters and crystal clear in others. Its almost as if either the lens was smudgy or the sensor was problematic.

The picture literally deteriorates dramtically at random points and then improves.

Any ideas would be appreciated.

Many thanks

Antonio, Anna y Eduardo Felipe
Antonio y Anna
jchunter

Post by jchunter »

Hi Tony,
Well, assuming you have throughly cleaned you VCR heads before you captured, the heads could have been dirty when you initially recorded the tape. Also, the tape is probably old and stretched in places, etc.

But, you can just edit the bad spots away with VS9 and replace them with transitions... But - test for OOS before you burn your DVD.
John
THoff

Post by THoff »

I'd also check if the same playback issue is apparent when you view the DVD on your PC. Bad or incompatible media can cause pixelation and dropouts during playback, and the burner that wrote the disk has the best chance of reading the data back correctly.

If the disk plays fine on the PC, you should try another brand of disks. If the same problem shows up on the PC but the source video doesn't have issues (like dropped frames during capture), then the encoding is bad for some reason -- maybe the bitrate isn't sufficient, but 6Mbps should be OK for general usage.
tonyjer
Posts: 196
Joined: Thu Mar 03, 2005 12:41 pm

Many thanks for your advice

Post by tonyjer »

Thanks John and Torsten.

TJ
Antonio y Anna
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