We recently switched our server to CentOS with QuickSync built from source per the Wowza 3.5 instructions and have noticed a considerable shift in quality of the resulting streams. While our Windows server was able to deliver near flawless transcodes of 4 HD streams the new CentOS server has severe banding and artifacting in large color fields. The quality is very poor in comparison to the Windows QuickSync experience. Do you have any suggestions for improving stream quality on Linux?
The current instructions are pointing to the staging source depot of the Intel VPP library. At the time of writing of the article this depot contained the first cut of the source code that included support for the main profile. I believe this version of the code has been released and there is a chance the staging area now contains new code that is less stable. I am working on revising instructions for the updated source code. I will report back when I have a more stable build process.
Can you provide a sample of the bad looking stream? If possible please send a URL to
firstname.lastname@example.org and reference this forum thread.