Sony Vegas blocky videos (After Render)

[Josh Bullen]

I’ve too had this issue. I rendered in 1080p and the majority of the video is fine, but is broken up with intermittent periods of ‘blocky video’. Source material is fine and is definitely a post-render issue.

Hope someone can help myself and Tristan soon.

[Tristan Burns]

Thanks for the response! Glad to hear I’m not the only one with this problem.

[Dave Weldy]

have the same issue here

[Stephen Mann]

Your PVR is recording in a very compressed MPEG2 format, then you are recompressing it into MP4. MPEG does not do well with large solids.

You might try using the deblocking filter. From the help file: “AVC encoding divides a video frame into smaller sections called macroblocks and compresses each block separately. During decompression, edges between the blocks can sometimes be seen. A deblocking filter smoothes the edges between blocks to make them less visible.
When encoding to a low bit rate, select this check box to set a flag that allows the decoder to apply a filter to reduce the appearance of blocking in your video.
When encoding to a high bit rate, clear the check box. Deblocking high-bit rate video can produce artifacts.”

Also, what “quality” or speed setting is your PVR set to? Some are 2,4,6-hour “modes”. Each in progressively higher compression and worse for editing. Not that a PVR file is good for editing in the first place.

Steve Mann
MannMade Digital Video
http://www.mmdv.com

[Tristan Burns]

Thanks for the help! But one question.. what is considered a high bit rate when encoding? For example if I use a variable bit rate of 14,000,000 max.. and 10,000,000 average..Is that high?