50fps and Sound

[menace3000]

Hello everyone.
Thanks for this great forum which has been a great inspiration to me. I have been shooting a lot of material with a PAL gh1 in 50p. I am using a mac workflow: Toast to transform avchd into apple intermediate, then cinema tools to conform to 25fps. Then I load into fcp and it´s all very nice slow motion but the sound is broken.
Now how could I keep the sound on the clips? The idea is to shoot 50fps, so that then in the editing I can decide whether to have it slow motion or "speed it up" to 25fps. It would be great to use cinema tools to also slow down the sound instead of breaking it.
Best,
Dennis

[Martti Ekstrand]

You don't need the Cinema Tools step. Just set the frame rate to 25 in Toast and it will skip every second frame when converting and you get half the file size. Only hitch is that Toast more often than not makes a couple of freeze frames at the beginning of the clip but the sound starts at once. That's easily fixed by de-linking in FCP, cut off the freeze frames, sync up the clips and re-link them.

Clips you find you want to have in slo-mo you can always go back and convert again at 50 instead, bring them into FCP and apply time stretch at 50%. If you want to stretch the sound to fit the slo-mo cut I guess you'd do it best in Soundtrack Pro but a 50% audio stretch is hard to make sound natural however you got about it. Very dependant on what kind of sound you've got in the clip. A quick'n'dirty way in FCP is applying the Apple AUPitch filter at 1200 but that sounds rather weird.