25p to 24p Blu-Ray

andyrpsmith wrote on 8/10/2016, 4:47 AM

I'm trying to get the best possible playback on Blu-Ray.
I have all my fantastic mountain shots from Switzerland shot in 4K at 25p and produce final edited video on Blu-Ray which needs 24p.

I edit on Vegas timeline 4K 25p and use the bluray template in Sony AVC 22Mbps at 24p.

With smart resample on the images are razor sharp with no movement and blurred/ghosting in motion shots.

With smart resample off the ghosting/blurring is much reduced but the movement jumps (due to the loss in frames 25p to 24p I guess). Panning slowly across a scene shows the mountains move in little jumps across the frame - horrible.

Is there anything I can do in the work flow to reduce blur/remove jumps (would slowing the video on the timeline help in any way?)..

Rendering as 50i (supported in Bluray) adds other annoying issues in the playback.

Grateful for any help.

thanks
Andy

Comments

PeterDuke wrote on 8/10/2016, 5:58 AM

It should be possible to render to 25p to 50i with no problems. Disable resample on the event properties for each clip on the timeline. That way the second field will be a simple copy from the frame of the first field.

When viewing you should disable deinterlacing.

Converting 25p to 24p and vice versa has been discussed here many times. Essentially it is slowing down the movie by 24/25 = 0.96.

Set the timeline to display frames, not time. Note the last frame number. Change your project properties to 24 frames per second. The last frame number will now be different. Control/drag the end of the timeline until it gives you the same number of frames you had before. Render as 24p.

Former user wrote on 8/10/2016, 6:10 AM

I also tried the 24p option, thinking it might be better but experienced similar issues to yourself. I then just used the normal highest bits/second interlaced option, saved to iso. I didn't know that disabling resample would improve things further.

andyrpsmith wrote on 8/10/2016, 7:00 AM

Thank you both for the reply.

I have tried 50i but you get jaggies and other flashing artefacts from the down sizing which make it not as acceptable as the 24p option.

The best option may be as suggested in keeping re-sample off and dealing with the frames on the timeline when set to 24p. I am going to give this a try.

I have tried other options in using different codecs and bit rates but all end in the same issues.

The camera (Sony AX100) can record in 24p maybe that is what I should stick to for the future at least until I can burn 4K bluray discs.

musicvid10 wrote on 8/10/2016, 7:31 AM

See if you can live with it just sped up, frame-for frame, with no sampling.

andyrpsmith wrote on 8/10/2016, 3:13 PM

Peter, it's looking good!

I had to group all the clips together in 24p and ctrl drag all out to the end frame number as in 25p

I'm rendering now to Bluray 24p to see how it looks.

If it comes out as it looks on timeline I will be well pleased.

Update;

Burnt a 24p Bluray disk-

Fantastic, well done Peter, it has worked wonderfully with no blur and sharp picture during motion - no ghosting.

Many thanks indeed

Andy