-
Sync/Framerate Issues with Alexa ProRes
Hi everyone,
I’m currently editor on a short shot on the Arri Alexa. The first reel was accidentally shot at 25fps, with the timecode set at 24fps. The camera assistant didn’t think this would be an issue as the frame rate was correctly set, however FCP identifies the footage as 24fps so sync is drifting horribly in the 25fps sequence. I’m pretty sure the footage is 25fps as there is drift even in a 24fps sequence.
My first plan was to re-conform to 25fps in Cinema Tools but for some reason it comes up with an error message saying it can’t access the clip info to change it (I’ve tried on two FCP suites). I’ve tried encoding as both 24 and 25fps from MPEG streamclip, but it also sees the footage as 24 so that’s no help either. I’ve also tried exporting an image sequence and creating a 25fps file from that but to no avail.
Does anyone have any ideas? It’s a master shot that lasts the entire length of the programme so would be a bit of a disaster to lose and I don’t really want to have to sync every line of dialogue by eye!
-
3 Replies
-
Can you modify the timecode track in the Viewer?
Modify/Timecode. Change it to 25.
-
Good idea, but unfortunately no luck with that either!
The reels come from the camera with an XML file that contains the clip metadata, these files can be imported into FCP as a way to preserve info about each clip as you ingest. I can see where the timebase is listed for each clip in the XML, so could alter it there, but the file permissions don’t allow me to alter them…
-
Tim,
You should be able to modify the permissions for the files in the finder “get info” window. Or, if you are handy with the Terminal, use the “chmod 0777” command. Of course, proceed with caution and keep a backup of the “good” xmls.
Also, are you sure there isn’t an issue with the audio? Does the rest of the footage sync up fine? If the clip is truly being interpreted at the wrong frame rate, then I would think using Cinema Tools and the “conform” command is you best bet. It could be you have to fix the permissions on the quicktime in question in order to get Cinema Tools to work.
Hope this helps,
Matt Lyon
Editor
Toronto
Reply to this Discussion! Login or Sign Up