Blockiness problem!

[Grifo]

What i have to do to eliminate the blockiness of my videos? i encode the avi files to mpeg2 with TMPGencoder 12h...please help!

[sunmiztres]

What source are the .avi coming from? HOw is the quality of the .avi as they are? YOu can up the bit rate or use filters depending on what encoder you are using. Need alittle bit more info on what you have and what you want to do with it.

[Grifo]

The captured avi is DV format, the bitrate i was using is cbr 2550 because my standalone dvd only reads svcd at this bitrate. I am using tmpgencoder 12h for mpeg2 conversion, quality 65, pal format, DC 10 bits...what do you want to know more? ask and i do you reply...im only want to remove those artifacts from my videos!

[Andrew Deemer]

Blockiness is caused by two things ... rapidly changing pictures (motion) and the fact that DV and MPEG use different colour spaces. The Chroma information is sampled less frequently than the Luma in DV - and when you transcode it to MPEG it throws away even more (different)colour information. The result is patches of similar colour being coded as a block.

If you can't set your bitrate any higher - make sure you've got scene detection working . . as this will force an I-Frame to the start of each scene (when the bits are really needed)

Andy

[sambahri]

i have read that making scene detection working in a long clip where there is lot of motion degrade the whole clip... is that right??. and if it is right what is the cause and when its better to use scene detection.. thanks... sam