If you are doing editing on a film and you notice that things are moving too fast or too slow, you will need to figure out the correct frame-rate and fix it. For the most part, film is recorded at standard speeds, but there are always odd-balls because older film cameras can do whacky things.
Step One: Do The Math
Look at how many frames per second (fps) your film is currently being played at, and then speed up or slow down your film to figure out the true speed. The best case scenario is if you have access to the computer that did the pulldown, you can use it's program to preview the film at different fps speeds! Once you know the new speed, use this simple equation:
And you take this rate, and simply right click on the event in Vegas and change the Playback Rate setting to this number.
Step Two: Stretch the Event
Once you've set the playback rate different, you'll need to stretch the event on the timeline longer so that you aren't clipping the end of it.
Step Three: Open MyFilms
Step Four: Find the Film
Sort by Client ID, and your film is likely near the top. You can scroll down and find the film by it's relative ID, which matches the filename's ID from the timeline. Else sort by whatever is more relevant and find it.
Step Five: Change Values
There are two parts that need to be updated in the MyFilms database: Duration & FPS. You should already know the fps, but if you only guestimated by stretching the clip, reverse your math to figure it out:
Of course, it's very doubtful that you got it perfect, so round it off to a real FPS count (12, 15, 16, 18, 20, 24, 30). For the duration, enter the exact number of seconds that the new clip is at.