-
URGENT! Duplicate Frames from HDV-TQ
Hi,
we shot some footage with a Canon XL-H1 and converted it with a Decklink Blackmagic card on a MAC to a PhotoJPEG Qicktime in full resolution.
It seems there were a lot drop frames during importing.
When we open the QT -> Movie Inspector it says 18.49fps (it should be PAL 25fps).Now when we import the QT-files into AE it interpretes them correctly with 25fps but when we scroll through the frames we see alot duplicated frames which makes the movie a bit jiggy when watched closely.
When we watch the QT frame per frame there are no duplicated ones and its also in correct timelength.
Now how to get rid of the duplicate frames? We tried everything till now (interpeting them with 18.49, time stretching and so on…)
Can you help us, please? It very urgent!
Thank you
-
2 Replies
-
it’s possible that your photojpeg clip exceeded the data rate of the drive that you catured to…. it sounds like the footage was shot in hdv, you might try capturing as hdv, if that’s an option with black magic, then convert to something easier to work with in ae, like photojpeg. hdv has much lighter data rates and should be able to be captured by just about any drive.
there is one other interesting thing you mentioned… in qt, the inspector will give you to frame rates, one should be the actual frame rate and, if the movie is playing, the other will be the playback framerate. so, do you know if the 18.49 fps the actual frame or the playback framerate? if the 18.49 is the playback framerate then the photojpeg file is exceeding the data rate of the drive, and you will want to find another way to capture, if it’s the actual framerate, then there is still some mistery…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
The framerate of 18fps shown in QT is the actual framerate of the clip.
We think that the capturing was the problem. Seems like we captured it in 10bit with black magic and this exceeded the data rate of the harddrive as well as the power of the cpus which had to convert it on the fly to the PhotoJPEG-Quicktime. So you are right with the data rates. We used the SDI interface as well, which was wrong, too (our editor said so).
We’ll have to recapture the stuff again. This time using the firewire connection.We’ll capture it with the Apple HDV-Codec using FCP (settings to HDV1080p25) and then convert it to the PhotoJPEG. Let’s hope we get rid of the drop frames this time…:(
Thanks
Reply to this Discussion! Login or Sign Up