Pixelation when exporting at DVinfo.net

Anthony Schneider · August 5th, 2009, 01:56 PM

Hey guys ok so I have run into a little problem when exporting my final video.

I shot on Canon XLH1, and while editing/capturing there is no pixelation at all and the video looks crisp. However when I compressed the video for Vimeo, all of a sudden I have weird pixelation that occurs whenever there are like bright flashes of light or sudden movements... Anyone know what could be causing this? Unfortunately I am a horrible newb for the most part and don't understand all the technical lingo that well... Hopefully someone can help me out!

Thanks!

Craig Parkes · August 5th, 2009, 08:59 PM

The thing here is that you have COMPRESSED your video. Your compression is adding the artifacting.

Getting compression right is part science, part art, and generally a lot of practice/experience/experimentation.

What are you doing to compress it - there in will lie your problem (and your resolution.)

Robert Lane · August 5th, 2009, 10:32 PM

Anthony,

You're part of the best forum on the planet for learning exactly this type of thing. Since your Canon uses HDV there are a few gotchas to avoid when it comes both to camerawork (production) and final compression for output (post). There are literally dozens of threads - even specific to your camera model - about compression settings for every NLE on the planet.

Do a search for "XLH1 compression for web" and variations of that search and you'll end up with more info than you can digest anytime soon.

Don't hesitate to hit us up for help when you're stuck.

Stick Tully · August 6th, 2009, 05:39 AM

Try compressing to h.264 and running a two pass encode. this should help with the flashes.

for a very simple encode try these settings:

video:
frame rate: current

key frames: automatic
data rateL automatic
compressor quality: high
encoding: multi-pass

audio:
AAC
Stereo
Bitrate: 192 (or higher)

That should give you good looking video, you can tweak a lot of those settings for the same in quality but smaller file size but if you're new to this give it a go. If it makes a video too large to upload try 1/2 the frame size or reducing the compression quality.

best of luck

stick

Joachim Hoge · August 6th, 2009, 06:02 AM

If you export from Compressor, try to turn "frame controls" on, it´s in the inspector window. It´s a bit tricky to find, but it´s there. That helps AND increase render times of course

August 5th, 2009, 01:56 PM	#1
Anthony Schneider Regular Crew Join Date: Dec 2007 Location: Chicago, IL Posts: 32	Pixelation when exporting Hey guys ok so I have run into a little problem when exporting my final video. I shot on Canon XLH1, and while editing/capturing there is no pixelation at all and the video looks crisp. However when I compressed the video for Vimeo, all of a sudden I have weird pixelation that occurs whenever there are like bright flashes of light or sudden movements... Anyone know what could be causing this? Unfortunately I am a horrible newb for the most part and don't understand all the technical lingo that well... Hopefully someone can help me out! Thanks!

August 5th, 2009, 08:59 PM	#2
Craig Parkes Major Player Join Date: Dec 2006 Location: Auckland, New Zealand Posts: 444	The thing here is that you have COMPRESSED your video. Your compression is adding the artifacting. Getting compression right is part science, part art, and generally a lot of practice/experience/experimentation. What are you doing to compress it - there in will lie your problem (and your resolution.)

August 5th, 2009, 10:32 PM	#3
Robert Lane Go Go Godzilla Join Date: Nov 2004 Location: Scottsdale, AZ USA Posts: 2,823 Images: 15	Anthony, You're part of the best forum on the planet for learning exactly this type of thing. Since your Canon uses HDV there are a few gotchas to avoid when it comes both to camerawork (production) and final compression for output (post). There are literally dozens of threads - even specific to your camera model - about compression settings for every NLE on the planet. Do a search for "XLH1 compression for web" and variations of that search and you'll end up with more info than you can digest anytime soon. Don't hesitate to hit us up for help when you're stuck.

August 6th, 2009, 05:39 AM	#4
Stick Tully Regular Crew Join Date: Oct 2006 Location: Brighton Posts: 92	Try compressing to h.264 and running a two pass encode. this should help with the flashes. for a very simple encode try these settings: video: frame rate: current key frames: automatic data rateL automatic compressor quality: high encoding: multi-pass audio: AAC Stereo Bitrate: 192 (or higher) That should give you good looking video, you can tweak a lot of those settings for the same in quality but smaller file size but if you're new to this give it a go. If it makes a video too large to upload try 1/2 the frame size or reducing the compression quality. best of luck stick

August 6th, 2009, 06:02 AM	#5
Joachim Hoge Major Player Join Date: Apr 2005 Location: Oslo, Norway Posts: 402	If you export from Compressor, try to turn "frame controls" on, it´s in the inspector window. It´s a bit tricky to find, but it´s there. That helps AND increase render times of course