jerky motion in SD DVD

[cecooper]

Resolution and quality is great downsizing from BD ISO to SD DVD 5 or 9 but motion is jerky. Is there a setting to correct that or is it a result of converting from 24 fps to 29 fps?

[jdobbs]

Resolution and quality is great downsizing from BD ISO to SD DVD 5 or 9 but motion is jerky. Is there a setting to correct that or is it a result of converting from 24 fps to 29 fps? It's more than likely your player. If it is on your computer it could also be the video card or hard drive fragmentation.

But the bottom line is that jerkiness isn't a result of or related to resizing to DVD-5 or 9.

[cecooper]

well....it's not smooth on a HTPC setup for bluray and looks the same on a DVD player connected to a 32" CRT. In all fairness... I have tried several pay/trial versions of other programs and they all end up with same stutters in motion. In BDRB, audio is fine, video quality is better than commercial DVD. The motion issue is still very watchable and not that big a deal, just wasn't certain if I was missing something. jdobbs, BDRB is a great bluray convertor program. I talk it up bigtime when my friends are asking how I put that movie on a BD25.

[QBhd]

Why are you converting the fps?

[cecooper]

totally guessing about the FPS possibility. thought i saw that bluray was 24 fps and seem to remember DVD is 29.97 fps. i don't think BDRB has any fps settings to tweak.

[jdobbs]

totally guessing about the FPS possibility. thought i saw that bluray was 24 fps and seem to remember DVD is 29.97 fps. i don't think BDRB has any fps settings to tweak. That can't happen unless you are resizing to 720x480. That's because 24fps is illegal in that format. But, even in that format it is actualy only converted to 29.97 through the use of pulldown -- it is physically still the original framerate.

I should note that there are many software players that cannot play pulldown back correctly on a computer -- and the result might appear as jerkiness. In those cases the fault is definitely in the player.

[MilesAhead]

totally guessing about the FPS possibility. thought i saw that bluray was 24 fps and seem to remember DVD is 29.97 fps. i don't think BDRB has any fps settings to tweak.

As an experiment I would try using the hidden option to set HC encode profile to Best. BDRB aside, I've tried HC encode downsizing from HD res to SD using normal profile with DC 9 precision and in some cases, especially if I try multiple instances of HC, I've gotten unwatchable jerky motion.

If it's possible, try setting HC profile to Best and DC precision to 10 on the same conversion that got jerky motion. See if it's smoother.

[cecooper]

I see the hiddenopts.txt file but have never used it and not certain how the program uses it. I don't see a DC precision setting. HC profile is not set here but I always set "highest - very slow" in the program. Quality is outstanding at that setting. Guessing that setting applies to DVD as well as BD25 compressions.

[MilesAhead]

I see the hiddenopts.txt file but have never used it and not certain how the program uses it. I don't see a DC precision setting. HC profile is not set here but I always set "highest - very slow" in the program. Quality is outstanding at that setting. Guessing that setting applies to DVD as well as BD25 compressions.

To set HC to BEST profile you would set
HC_PROFILE=BEST

under [Options] in BDREBUILDER.INI

The DC precision may not be adjustable.

Usually when I run into jerky motion it shows up on the DVD player, not a software player on the PC. But HC can be quirky esp. with multi-thread or multi-instance.

Lately I've taken to just putting .m2ts or .mkv source through QuEnc 0.75 Alpha 8500 CBR for DVD9. Fast and looks good if at that high bitrate.

Have you changed the resize filter by any chance? I used to get some stuttery motion using Spline16Resize when sizing down. That's the only other thing I can think of. Again though, it looked fine on software players but the funky motion showed up on hw DVD player.