Help please, suggestions for jittery playback

DiscCoasterPro · Post by **DiscCoasterPro** » Fri Jul 07, 2006 10:06 pm

Results of burning the AVI file without audio ...SUCCESS smooth as could be.

Now .. what the heck is going on? LOL I don't really understand the 32bit floating point Stereo listed under Project Audio

The 16bit and 48000hz is what I keep my camcorder set to, so that makes sense.

Anyone understand whats happening here or have an avi file of their own that works in DWS and look at the bits?

thanks
dcp

htchien · Post by **htchien** » Sat Jul 08, 2006 1:57 am

In video files the audio would be mixed with video frames (normally it's 8 video frames with 1 audio frame), so if some encoder did not mix the audio with the video frames properly then this issue might happen.

For this case, split the audio part of the video clip to a stand-alone audio file and import into DVD WS separately would fix the issue.

The other situation that will make your DVDs look jitterly on TV but OK on PC is, your player cannot accept such high bit rate to play the DVD (most players would play DVDs higher than 7000 kbps, but some old players cannot not). If this is the case, lower the data rate of the project, or replace your DVD player.

Hope this helps.

H.T.

DiscCoasterPro · Post by **DiscCoasterPro** » Sat Jul 08, 2006 2:49 am

Thank you very much for your reply! The high bit rate setting is an interesting bit of info! Thanks for clearifying why this was acting up.

I decided to encode this compilation to MPEG in Premiere, and then import the full mpeg movie for some minor splits and chapter settings.

Success! OMG you should see the DVD Carnage laying around my computer room LOL . I sure hope Verbatim goes on sale this weekend, I'm ready to reload.

thanks again to htchien and all! Everyone was very helpful in offering thoughts. Jethro, your post got me on the right track.

I do believe that rather than render my Premiere timelines to DV/AVI in the future, I'm going to just create an MPEG file right in Premiere when I'm done editing. Seems like a safer bet.

thx again
dcp

DiscCoasterPro · Post by **DiscCoasterPro** » Sat Jul 08, 2006 2:47 pm

htchien wrote:In video files the audio would be mixed with video frames (normally it's 8 video frames with 1 audio frame), so if some encoder did not mix the audio with the video frames properly then this issue might happen.
H.T.

I was trying to understand how this actually happens Given a particular length of AVI footage on a timeline (for example) and you want to add an audio clip to it. If you have the same audio clip in both WAV and MP3, will these two clips show up as different lengths on the timeline when added under the video clip? I've never experimented to see.

If yes, how does this effect the 8 to 1 ratio? If no, what does that mean, the NLE takes the decompression into account as you add it in?

thanks,

skier-hughes · Post by **skier-hughes** » Sat Jul 08, 2006 5:06 pm

HT is talking about interleaved audio and video, whereas you are discussing seperate audio and video.......

If you took a WAV audio file it should be exactly the same length as an MP3.

DiscCoasterPro · Post by **DiscCoasterPro** » Sat Jul 08, 2006 5:17 pm

Ah... of course ... thanks much Graham!

pauley · Post by **pauley** » Sat Jul 08, 2006 10:01 pm

I'm coming late to this party, but I just wanted to add that I use Premiere's encoder as well. The .m2v and .wav files it creates seem to avoid the audio mistiming I had encountered in the past. I had not encountered the jittery issue as you describe.

- DVDWS will not touch your mpeg (m2v) file if you tell it not to convert. Add as many chapter points as you wish. It won't matter. I have not tried to trim the clip in DVDWS - not sure what that would do if you trimmed off of an I-frame.

- I DO use DVDWS to convert the audio to AC3 (make sure to check the convert to template box in the audio 'folder').

- I have created DVD menu backgrounds in Premiere. DVDWS seems to ignore any template setting and convert those mpgs to its own settings. Very annoying since it leads to image degradation.

Pauley

DiscCoasterPro · Post by **DiscCoasterPro** » Sun Jul 09, 2006 4:35 pm

Thanks for the input pauley. Well, I can tell you that after converting this troubled DV/AVI in Premiere over to an MPEG, I did in fact take a chance on splitting the clip in DWS so that I could return to main menu after each chapter.

The result was fine, the jitters were gone. Jethro mentioned , and HT clarified what I believe my particular situation was, and you further helped me understand why Premiere didn't pick it up even earlier than the creation of the DV/AVI file.

To add the last bit of torture to this whole thing Premiere stopped dead at 99.98% encoding to mpeg for about 5 minutes. I dunno, it must have been writing or who knows.... but my fingernails were already down to the second knuckle by then ... Hahaha You think they could stick a pop up window in saying "HEY DON"T WORRY, ITS OK, YOU'RE NOT FROZEN" ha.

thanks all

DiscCoasterPro · Post by **DiscCoasterPro** » Tue Jul 25, 2006 4:42 am

Something fishy is going on here.

I just completed a second project shot completely from gs200 minDV with a seperate small jpeg slideshow

I'm getting the same jitters after saving the compilation from Premiere to a DV/AVI file and then bringing it into DWS

I do not see any option available to change field order for DWS when it encodes.

Although I have not yet tried with this project I'm confident that if I encode to mpeg in Premiere as I did before, I can resolve this jitter thing.

The funny thing is, it never ever was an issue. I can't find where field order settings are available. I connected the miniDV camcorder just to see if the option becomes available in the capture mode, but I can't find it.

I'm picking at straws again trying to figure out what is going on. <sigh>