[Keith Slavin]

Hi Jason,

Firstly, interlace artifacts become more pronounced with motion and a fast shutter speed. A high quality deinterlacer should take care of it. Secondly, normally filmed clips at 30 frames/sec requires about 1/60 sec shutter speed, but slowed-down clips require about 1/2 this at 1/120 sec. This is still more blur than your 1/500 sec, so you may need to add motion blur.

However, you did do the right thing shooting at 60i, instead of 30p! This is because the temporal sampling rate is 60, not 30, which helps with motion estimation in general. Also fast shutter times can be adapted to a larger range of frame rates, as it is very difficult to reduce motion blur.

We have tools for dealing with both issues – high quality deinterlacing and motion-blur adjustment. If you like, you could send us a link to download a short clip, and we will convert it for you. I assume you wanted 60->30 (2:1) slowmo?

Best,

keith@isovideo.com

[Keith Slavin]

Hi Andy,

If you want to redo your footage for 25P distribution, you need to add some motion blur. We (isovideo) have advanced processing tools to do just that. If the clip is not too long (say 5 minutes max), we could convert it for free if you would like to try us out. What would work best for us would be the original 50P, which we would then downsample to 25P, while also adding blur. We can handle prores4444 input, but can only generate prores444 (no alpha) on the output. If you are interested, send me email at keith@isovideo.com with a link to download the clip.

Keith

[Keith Slavin]

Hi Zachary,

This reply probably a bit late for your current problem (decoding, upscaling, interlacing and encoding), but just for your information, isovideo will soon releasing their file-based, GPU accelerated, motion-compensated standards conversion / transcoding server. Which can handle your current job fairly easily, quickly and with high quality.
If you still need help with this, you may contact me at keith@isovideo.com.

[Keith Slavin]

“Can someone make a recommendation how to make good and reasonably fast framerate conversions without having to spend hours during the setup process?”

Check out Viarte – a file-based, mountable, drag-and-drop, MC standards-conversion / transcoding server to be released fairly soon from isovideo.com. Viarte can be configured easily. If you would like to try a few test clips, contact them directly.

[Keith Slavin]

Hi Zachary,

This reply probably a bit late for your current problem (decoding, upscaling, interlacing and encoding), but just for your information, isovideo will soon releasing their file-based, GPU accelerated, motion-compensated standards conversion / transcoding server. Which can handle your current job fairly easily, quickly and with high quality.
If you still need help with this, you may contact me at keith@isovideo.com.

[Keith Slavin]

Hi Jack,

Have you established for sure your 29.97 footage is interlaced or progressive? If it is interlaced, the best solution is to use 3:2 interlace pulldown (NOT duplicated frames!) to convert the 23.976 footage to 29.97 to match the other. If the 29.97 is progressive, you need to frame-rate convert one to match the other. Cleaner (lower noise) footage will frame-rate convert better, and a higher input frame rate will also help (so 29.97->23.976 would be easier, all other things being equal), but it also depends on the degree of motion. Have you had any luck getting good results yet? We have high quality tools for all of these approaches. If you want, send me email at keith@isovideo.com, with a link to a short test clip, and we could convert it for you.