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| nasrul |
| Posted: Oct 12 2002, 12:12 PM |
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Unregistered
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Hi,
Appreciate some help here. Why is it after I've done some filtering example bright/contrast/gamma filter or anything the image becomes blocky? How do I overcome this? |
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| fccHandler |
| Posted: Oct 12 2002, 04:17 PM |
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Administrator n00b
Group: Moderators
Posts: 3961
Member No.: 280
Joined: 13-September 02
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You haven't really given us enough info, but "blocky" is a term often used to describe video compressed with a too low bitrate setting. Try increasing the bitrate setting of your video compression. If you continue to have this problem, give us more details in your next post.
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May the FOURCC be with you... |
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| nasrul |
| Posted: Oct 12 2002, 04:46 PM |
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Unregistered
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Hi FccHandler, thank for replying. My apologies. My question is on image quality. The blocks that I'm referring to is the squares that appear on the image. For example when you do a sharpening of a video footage, you will see these squares. Pls help me as it is very frustrating. I hope info is clear. |
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| Kippesoep |
| Posted: Oct 12 2002, 06:11 PM |
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Moderator of the Virtualdub support forum
Group: Moderators
Posts: 447
Member No.: 441
Joined: 6-October 02
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The problem is as fcchandler mentions. If the source file is encoded at a low bitrate, this means that the source data will exhibit some blockiness. Using a sharpen filter will make this worse. It gets even worse when you subsequently compress the file. Try something like Donald Graft's "smart smoother" or my "static noise reduction" filter.
Also, if the video is something you captured yourself, make sure that you've captured to a lossless format (I find HuffYuv to be an excellent codec for this) and don't compress to something such as DivX until you are ready to write the final file. |
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