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CS5.5 jittery h.264 exports

May 17, 2012 2:37 PM

Tags: #problem #cs5.5 #export #encoding #h264 #motion #jittery

Hello all,

 

I am new to the pro HD editing world, so please be patient

 

I have been editing HD video content on Premiere Pro CS5.5 from different sources (XDCAM, AVCHD, etc) on a newly purchased iMac with the following specs:

 

2.8GHz quad-core Intel Core i7

8 GB memory

1TB storage

AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory

 

My exporting process is to first make an uncompressed Quicktime master (YUV 8 bit 4:2:2), then encode h.264 exports from there. Final delivery is mostly for web streaming.  I am currently only using ONE DISK, the main disk, for all media storage, OS, etc.

 

OK, so my problem is a consistent one with exporting HD timelines and I need help isolating the possible sources of the problem.

 

When I export (after making sure all sequence settings were correct and all export settings match) to h.264, it plays overall smooth on my Mac. The worst problems I'll notice is an EVER so slight motion delay here and there, but overall it looks good. When I upload it to Vimeo, or test it on other computers (especially iPads for some reason), the motion looks awful. The transitions and shots with heavy movement are marred by weird horizontal lines at the top third and middle of the screen. Overall, the video looks jittery and just not right.

 

I can not for the life of me figure out what I'm doing wrong. I'm starting to wonder if there might be a problem with the software, or my hardware. I only use one disk for all media storage, editing and export, but would that cause such export problems? And why does it play better on my Mac than it does anywhere else? It's hard for me to tell what the flaws of my export are until I test it on another device.

 

Can someone please help me trouble shoot what the various culprits may be?

 

Many, many thanks all!

 

Nick

 
Replies
  • Currently Being Moderated
    May 17, 2012 10:13 PM   in reply to 3l3ctricdr3ams

    what is source frame rate? Is it interlaced?

    what is timeline frame rate? Is it interlaced?

    what is export frame rate? Is it interlaced?

    I ask because going from 24p to a 29.97 timeline will do 3:2 pullup. exporting back to 24p will do 3:2 pulldown.

     

    but.... imagine you have frames ABCD. @29.97 that's ABCDD (ie D is frame doubled).

    if you now downgrade to 24fps it throws away frames... but I know from use it's the wrong one so you get something like ABDD (ie C is dropped not D)

    that can cause the jitter you see.

     

    secondly, if you're using the H.264 exporter you need to change the Multiplexer to the iPad etc compatibility. This dumbs down the encode to make the H.264 a subset of the standard that QuickTime knows how to properly decode. Without it you get jittery playback.

     

    hope that helps,

     
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  • Currently Being Moderated
    May 21, 2012 7:56 AM   in reply to 3l3ctricdr3ams

    When I upload it to Vimeo, the motion looks awful.

     

    Post a link so we can see what you're talking about.

     
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  • Currently Being Moderated
    May 21, 2012 8:08 AM   in reply to 3l3ctricdr3ams

    Something's changed with Vimeo recently.  On a lot of their videos, I get no play controls, including yours.

     

    I haven't figured out why yet.

     
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  • Currently Being Moderated
    May 21, 2012 8:20 AM   in reply to 3l3ctricdr3ams

    Might be the internet connection.

    Plays fine, no choppiness what so ever.

     

    So does the interview.

     
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  • Currently Being Moderated
    May 21, 2012 8:21 AM   in reply to 3l3ctricdr3ams

    Unfortunately, no.  All I get is a static image.  Even the Download option doesn't work for me.

     

    Without seeing it for myself, it's difficult to speculate as to a cause.

     

    You may have to hang in there till someone else comes along and is able to view the links.

     
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  • Currently Being Moderated
    May 21, 2012 8:31 AM   in reply to 3l3ctricdr3ams

    Nope no issues.

    I am on Window, WMP.

    Maybe because i am on the otherside of the globe.

     
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  • Currently Being Moderated
    May 21, 2012 8:51 AM   in reply to 3l3ctricdr3ams

    OK, I found the issue with Vimeo.  Seems they've recoded their site in such a way that it now requires me to disable some of my browser's security features.  (Not crazy about that.)

     

    But the links you posted play just fine for me running an i7 2500 with a FiOS connection.  So...it is looking like the issue is simply with the users' computer/connections not being good enough.

     
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  • Currently Being Moderated
    May 21, 2012 9:46 AM   in reply to 3l3ctricdr3ams

    Because some media players just aren't very good with certain codecs.  VLC and KM Player are my "go to" players.  Both work flawlessly with most any format out there.

     

    But for some reason they just don't play nice with certain TS files I have, so I use UMPlayer for those, which plays them perfectly.

     
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  • Currently Being Moderated
    May 21, 2012 10:41 AM   in reply to Jim Simon

    Jim Simon wrote:

     

    Something's changed with Vimeo recently.  On a lot of their videos, I get no play controls, including yours.

     

    I haven't figured out why yet.

    yup, I only get a static image too.... no ability to run the video.

     

    As to the root cause of jitter....

    The iPod and QuickTime don't fully support the decoding of the H.264 spec. As such encoders have to dumb down the encoder by disabling features. The Mux'ing to iPod parameter on the CS5 "H.264" (now called "H.264 (legacy) in CS6) did the necessary changes to make it work.

     

    The "iPad", on the other hand, has added some of the missing parts of the decoding of the H.264 standard so the "iPad" multiplexing option is no where near as restrictive on the encoding rules vs the "iPod" choice.

     

    The technology that's missing will cause very jittery output if encoded with the technology but played back in QuickTime.

     

    IF, and this is the speculation, Vimeo streams to users what you encoded (vs transcoding it again) then you're at the mercy of the H.264 decoder being used in your web browser. Commonly that's the Windows one unless you install QuickTime - in which case it changes to the QuickTime decoder. The latter is still broken and would explain why some people have a problem and others do not.

     

    So, to test that theory I suggest you encode using the old iPod [compatible] Multiplexing option and see if it fixes it.

     

    'regards,

    Rallymax.

     

    Message was edited by: Rallymax-forum I cleaned up the meaning of some sentences.

     
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  • Currently Being Moderated
    May 21, 2012 11:07 AM   in reply to Rallymax-forum

    I only get a static image too.... no ability to run the video.

     

    Enable cookies.  (Didn't used to have to, but now it seems we do.)

     
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  • Currently Being Moderated
    May 21, 2012 11:11 AM   in reply to Jim Simon

    wierd... I just went back to that url to test that cookies were on/off and this time (with no change) the video controls came up.

     
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  • Currently Being Moderated
    May 21, 2012 11:13 AM   in reply to 3l3ctricdr3ams

    3l3ctricdr3ams wrote:

     

    Hi Ann, thanks for your help.  If you don't mind, here is one more link we have had some complaints about: https://vimeo.com/40555146

     

    What I'm confused about is that the video plays differently on different devices (might be the browser, not the device tho).  It plays smooth on my iMac, but not my older-version macbook and iPad, for example.  Is this enough to isolate it as a codec issue?

    Plays back fine for me but looks blurry - not out of focus blurry, just blurry like it's had a soft filter put over it.

     
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  • Currently Being Moderated
    May 23, 2012 11:23 AM   in reply to 3l3ctricdr3ams

    I think you're better off with the iPod mux'er.

    Having said that - I did some research for you yesterday and I'm now starting to guess that the mux switch only changes how it's muxed - not the crippling of the B frames that needs to happen in the encoder.

    So.... choosing standard or iPad or iPod or PSP probably won't help fix this jitter as I speculated.

    Unfortunately I don't have good solution for you.

    sorry.

     
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