Horizontal banding after mpeg render at DVinfo.net

Chad Dyle · September 21st, 2009, 07:31 PM

I recently upgraded to SL and FC7. I wrote down all of my FC6 settings and used them when I installed/setup FC7. I export video from FC as a reference mov and open in in Compressor. I use the same "2 Hour Best" setting that I have always used, but now I'm getting strange horizontal banding from top to bottom. It isn't always noticeable (to people other than me), but you can really see it when the video fades in/out to something else. I've attached a clip. Any help would be greatly appreciated.

http://www.chaddyleproductions.com/H...talBanding.mov

Robert Lane · September 21st, 2009, 09:34 PM

I definitely see the banding against the white-wall in the background that the couple is walking in front of.

This is partly due to low-light noise but you're also seeing interlaced artifacting as a result of the MPEG compression.

It would seem that Compressor 3.5 is more fussy with interlaced artifacts especially with HDV than in the past (could be that it's becoming more bit-rate accurate?) but the only way to compensate is to go deeper into settings, turn ON Frame Controls and make both motion and de-interlacing encoding to "better" or "best". This will drastically increase encode times but it will also produce much higher quality MPEG2 encodes, by far.

Chad Dyle · September 22nd, 2009, 03:10 PM

Robert,

I will run that clip through again with everything cranked up and see what happens. I'm going to check all of my settings from start to finish again.

September 21st, 2009, 07:31 PM	#1
Chad Dyle Major Player Join Date: Jun 2007 Location: New Orleans, LA Posts: 410	Horizontal banding after mpeg render I recently upgraded to SL and FC7. I wrote down all of my FC6 settings and used them when I installed/setup FC7. I export video from FC as a reference mov and open in in Compressor. I use the same "2 Hour Best" setting that I have always used, but now I'm getting strange horizontal banding from top to bottom. It isn't always noticeable (to people other than me), but you can really see it when the video fades in/out to something else. I've attached a clip. Any help would be greatly appreciated. http://www.chaddyleproductions.com/H...talBanding.mov __________________ www.chaddyle.com www.chaddyleproductions.com

September 21st, 2009, 09:34 PM	#2
Robert Lane Go Go Godzilla Join Date: Nov 2004 Location: Scottsdale, AZ USA Posts: 2,788 Images: 15	I definitely see the banding against the white-wall in the background that the couple is walking in front of. This is partly due to low-light noise but you're also seeing interlaced artifacting as a result of the MPEG compression. It would seem that Compressor 3.5 is more fussy with interlaced artifacts especially with HDV than in the past (could be that it's becoming more bit-rate accurate?) but the only way to compensate is to go deeper into settings, turn ON Frame Controls and make both motion and de-interlacing encoding to "better" or "best". This will drastically increase encode times but it will also produce much higher quality MPEG2 encodes, by far. __________________ Robert Lane Producer/Creator - Bike Pilots TV

September 22nd, 2009, 03:10 PM	#3
Chad Dyle Major Player Join Date: Jun 2007 Location: New Orleans, LA Posts: 410	Robert, I will run that clip through again with everything cranked up and see what happens. I'm going to check all of my settings from start to finish again. __________________ www.chaddyle.com www.chaddyleproductions.com