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Slippery Time Code
Hello,
I have hit a small road block on my latest project. I shot my footage using the Sony HVR-Z5, which gave me an output of .m2t files. Since I use Premiere CS3, I cannot edit the footage natively. Therefore I decided to use AviSynth for video serving using the method described here:
https://forum.videohelp.com/threads/273967-Editing-AVCHD-in-Premiere-without-intermediate-codecNow, this method has worked fine for me before, but here is the catch: every time I replace my low-res footage with the high-res avs files, the video seems to be off by about 25 frames. This only happens with my current sequence/project. If I try replacing the files in another project it works like a charm. The two files are identical in everything except resolution (one is proxy of course). If I place the two files on top of each other in a timeline, they match to the T.
Any help on this matter would be appreciated as the deadline is fast approaching.
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3 Replies
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Vishesh…
Just to clarify…
HVR-Z5 is an HDV cam.
So you Cut with DV based footage, then want to recapture and replace with the HDV native source?
noone at Adobe would believe me….but I ran into this problem couple of years ago.
You can not batch capture HDV and get matching source frames. The reported time code will match, the video frames will not and it will be off by varying amounts on every edit.
Sorry….but that’s the way that it is.
Export a mixdown of your DV edit and place it on a high video track of your recapture timeline.
recapture your edit with handles.
visually match your edits by slipping each clip and compare to the reference video, by muting and un muting the edit to compare.
Alex
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Thanks for the info Alex… I am relieved to find that I am not the only person with this crazy problem! I’ll try what you have suggested. However, it appears that if I use a transcoded file (photo-jpeg, .mov container) everything appears normal. But I am noticing a slight loss of detail with photo-jpeg. I guess I’ll try using a different codec or tinker with the settings. Anyway, thanks for showing me the light!
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I think it has to do with the fact that in an HDV stream, each frame doesn’t exist as it’s own entity….
You have some full frames and then some information about changes between frames…just a guess…
Alex
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