Vegas artifacts w/MTS files - fast moves blurring?

ken c wrote on 4/11/2010, 8:36 PM

Hi -

I think this is an 'interlace flicker' problem....

I had this problem years ago with sd-capture video too, hopefully someone can help. Using my sony sr11 camcorder to capture talking-head mts files for use in vegas....

problem is that during my hand gestures, my hands blur and cause distortion (forgot if that's called sampling/progressive line scan etc)... anyways the end result in previewing in Vegas is that it

a) produces jaggy-edged blurred hands when I move my hands using anything less than best/full video preview... (which is ok)
but
b) when I render, it produces a somewhat jaggy-edged footage (16 minutes) around my hands when they're moving render (to uncompressed avi)

Checking the source .mts in media player, it's hardly noticeable... and looks fine when using highest-res video preview box in Vegas.... but when rendering to uncompressed avi I get the hand/edge blur artifacts... any ideas?

usually whenever there's a problem with renders to wmv I use uncomp. avi as the way to get best-resolution output (in this case it makes a 40-gig file for 16 minutes at 640x395 pixel output)... using default deinterlace method blend fields/guassian blur/full res rendering quality set at good.

any suggestions on better render settings to produce a non-jaggy edged video output?

thanks,

ken

this looks related, any ideas on what settings to use in vegas to fix it?
http://www.pavtube.com/useful_tips/reduce_interlace_flickers_on_your_tod_videos_from_jvc_camcorders.html

Comments

farss wrote on 4/12/2010, 1:13 AM

1) Do you have any de-interlace method specified in your project properties settings?

2) When converting to progressive as all web content is the only good way I've found is to use Mike Crash's Smart De-Interlacer in a project at source resolution. I then nest that project in another which handles the scaling. Trying to do it all in the one project gives bad outcomes as I cannot find a way to do the de-interlace before the scaling (the triangle makes no difference?).

I've also had to do some careful investigation of the options in the Smart De-Interlacer to avoid wierd problems on horizontal edges that are moving. It's been a bit of a long road and I've added some of Mike Crash's Dynamic Noise Reduction into the pipeline as well. I think it's been worth it though. I think my 360p YouTube videos look as clean as they do at 720p. In the past the 720p as uploaded and as streamed by YouTube looked great and the 360p variant looked like mush.

Bob.

ken c wrote on 4/12/2010, 5:26 AM

Hi Bob, thanks- I'll check out that smart de-interlacer utility... I appreciate it. I've tried using 'none/progressive' properties settings, which helps a bit. Changing the other params didn't do anything on test renders (eg good vs best, guassian vs other etc). Seems a perplexing problem, eg with modern camcorders/technology, shouldn't have those blurred/shaky images/interlace problems for something simple like a well-lit talking head video w/moving hands... will try that DNR tip too, thanks! That's also a good idea re improving output for youtube publication; I'd like to have vimeo-like resolution, for commercial youtube videos.

-Ken

farss wrote on 4/12/2010, 5:52 AM

i don't know exactly what your problem is without more info however at a wild guess and as you haven't mentioned it I'd say start by trying to grasp what the "De-Interlace Method" does in the project properties.

If it is not set to either Blend or Interpolate them when interlaced video is scaled you get interlace aliasing which sounds very much like the problem you're having.

Bob.