07 September 2010

Green Screen Labratory

Well, I implimented the 3-point lighting system and I still has some trouble getting a clean key. I found that camcorder records in 720i. The software I use to edit needs the video to be in 720p RAW. Raw just means that the file isn't compressed. I was using Format Factory and Virtual Dub to convert the files as needed. But format factory did a poor job deinterlacing the video and then compressed it cause a blur green halo around me on the video reguardless of the lighting. Also, WAX, my video editor, has a very weak and basic chroma-keyer.


SO, I figured out how to use ffmpeg from the command prompt to convert the video to the right format without compression and deinterlaced all in one go.


ffmpeg_path -i input_file -deinterlace -r 29.97 -s 720x480 -aspect 16:9 -vcodec rawvideo -pix_fmt bgr24 output_path


I have also started to use t@b zs4 to do the chroma keying. The interface is the worst I have ever used. But the chroma key is great, clean and flexable. The results are as good or better than those I have achieved with the trial versions of Sony Vegas or Adobe Premier.

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