Hi, I've been converting some episodes from Xvid/DivX to MPEG2 to burn to dvd. The people who encoded the episodes switched from XviD to DivX then back again to XviD. The problem I have is with the episodes converted from DivX. When the screen changes from one scene to the next some blocks appear on the screen for a frame or two then disapear. I read someone say its called 'blocky transition'. It seems to happen at some points and not others. I'm using the tmpgenc wizard, select dvd ntsc, load the avi, non-interlaced, 1:1, film movie, 2-pass vbr, highest quality motion search precision. The converted XviDs don't have this problem at all, just the mpegs converted from the DivXs. Is there some magic fix to make this go away?
Well if there are No blocks in the Source XviD file then the Reason for the Blocks can be a Few Things or a Combination of them.... If you have to re-size the XviD files too much to make them DVD Compliant then this will totally ruin the Quality, so say of your XviD file has a Resolution of 512+306 or something simular and you are encodeing it to a Standard 720+480 Mpeg2/DVD file then that resizeing will Cause Blocks because the Resizeing Basicly makes any Imperfections Bigger and you are Spreading the same ammount of Pixels over a Wider area which makes you Loos Quality, The solution is to not use the 720+480 DVD standard, try useing the Half D1 standard which is 352+480 ,This will reduce the Blocks and Probably increase the Overall Quality... Also useing a Bitrate that is Too Low will cause Blocks, You should Maybe not use the 2-Pass VBR setting and try the "Constant Quality(CQ) setting as in most cases this will produce just as Good Quality in Half the Time..Also useing the "Highest quality" setting in Motion precition Search doesn"t really produce any better quality than the "High Quality" setting accept it makes the encodeing take twice as Long...You can also try enableing the "Soften Block Noise" Option in the "Quantize matrix" screen in the Tmpgenc Settings this help mask the Blocks but give the Whole Image a Softer Appearance.... I used to work for Tmpgenc Tech support so i learned Quite a Few Tricks useing Tmpgenc but I still found I got much better Quality useing CCE SP 2.67" in cunjunction with AVISynth for Creating DVD Compliant Mpeg2 Files...... Well Good Luck
