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Single frame not visible – help me understand
Hobbyist using AE v7 Pro on XP Pro SP3. Footage is 50i HDV PAL and converted to Cineform intermediate from original M2T.
Had a night shot and in the shot a camera flash goes off illuminating the subject for a single frame. Note that this is a single 50i frame.
Created a ‘standard’ PAL HDV composition which is actually 25fps. While compositting in AE I can see the single flash frame. It was my intention to use time remapping and freeze frame on it for a short while. It seemed to go well – working at half res (or less). Except every single time I rendered the subject remained dark, even during the freeze frame part of the clip.
This confused me for ages. If I change to full res in AE then the frame suddenly changed to ‘dark’, effectively going AWOL on me.
It appears to me that the single frame I had is simply getting ‘lost’ in the effective 25p conversion. My workaround was to open up the footage in a 50fps composition. There I could happily get at the single frame I had. Export a still and bring that back into the original comp. I got where I was going.
But I was wondering if anyone could help me understand what was really going on under the surface here. Apologies if it’s been discussed before.
Alan
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2 Replies
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Sorry. What I really meant was I’m trying to understand why I could see the single flash frame in AE on the timeline when scrubbing at half res or worse but why it disappeared when I switch to full res and/or rendered it out anywhere.
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That’s because AE only does a good deïnterlace when in full quality mode, when you scrub or use the dynamic resolution it only does a rough job and mixes the two fields.
The flash will probably be in the field that AE drops.
If you want to see the flash in Full Quality you’ll have to change your File Interpretion to lower field first. (only if you use it for a still, otherwise your motion will be wrong)cya,
Jan
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