Are you able to uninstall sp3? It sounds like one of your codecs got messed up (and from what you wrote, the only change you made was sp3).
That would be option number one for me if I were in your shoes. What is below may or may not prove any difference.
If you want, you can try this: https://www.sonycreativesoftware.com/forums/ShowMessage.asp?MessageID=602126&Replies=143
There is no warranty or guarantee concerning this. It is something that the Sony engineers are looking to implement in version 8.0c. It may or may not help you and it involves replacing a dll file. Make sure you do a system restore before trying this.
If you would like to help test the pre-release HDV reader for Vegas Pro 8, please follow these exact steps:
1) Download the file “M2tsplug.zip” from this ftp site:
{you must go to the thread provided in the link above and look for the second post from the forum adminstrator. Then please follow the instructions below.}
2) unzip
3) copy the file
m2tsplug.dll
into (default path) C:\Program Files\Sony\Vegas Pro 8.0\FileIO Plug-Ins\m2tsplug .
Choose yes when prompted to over-write.
4) Restart Vegas> Load up any HDV files or HDV projects you have been having trouble with.
5) Please post your results back to this thread. Don’t start another thread.
6) If you run into problems, please post details. Critical details are
a) full system specs
b) problem file genealogy
– What device recorded this file?
– Was the tape brand new, or was it used once or more?
– What application was used for capture?
– Has this file been opened or saved in ANY other application, such as Womble, or Premiere.
– What problem did you encounter (stability, red frames, black frames, other)
The more detail the better.
…….
Please limit your comments in this thread to HDV file problems only. This beta HDV reader does not change the behavior of other source file types, it is for checking HDV .m2t files only.
If you run into a problem with this new reader, please delete this file (m2tsplug.dll) and un-install/ re-install Vegas Pro 8.0b.
Do not contact SCS tech support about this pre-release HDV reader for Vegas Pro 8. This needs to be thought of as a component beta test between you, and SCS engineering.
Good luck, and we look forward to your results.
SCS dev
j razz