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Audio out of sync h.264 file. Premiere CS5.5

Feb 18, 2012 5:08 PM

After building a new machine with Premiere CS5.5, using NVIDIA Q4000 card, I'm having troubles wioth my audio being out of sync. I am exporting DSLR footage which the same sequence was previously fine on export on my old computer. Now, when I export, the audio is a few frames out of sync. There's something really funny going on. When I play the same video file in Windows media player, it seems to be in sync. When I play it in Quicktime, it's clearly out of sync. Also, when I upload it to Vimeo, it's out of sync as well.

 

If you'd like to see the specs of my computer, you will find them in this post:

 

http://forums.adobe.com/message/4211881#4211881

 

When I export the same file to Mpeg DVD, it seems in sync. Does this issue sound familiar to anyone?

 
Replies
  • Currently Being Moderated
    Feb 18, 2012 7:26 PM   in reply to Saad Khan

    This sounds more like a playback issue rather than an encoding issue.  Unfortunately, you've chose about the two worst media players out there.

     

    Try it in VLC, how's it work?

     
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    Feb 19, 2012 4:34 PM   in reply to Saad Khan

    With your sequence preset and h264 output, are you keeping the audio sampling frequency the same as the source footage?

     

    Also, have you sampled vimeo's playback on multiple systems?

    Vimeo has given me good results on several projects.

     
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    Feb 19, 2012 5:38 PM   in reply to Saad Khan

    Have you heard this happening before?

     

    I've never uploaded to that site.

     
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  • Currently Being Moderated
    Feb 19, 2012 7:48 PM   in reply to Saad Khan

    Refer to the raw footage to compare sound.

     

    Refer to your sequence to make sure that you didn't push the audio out of synch at all.

     

    Delete the media cache from the project and let premiere re-conform the audio.

     

    Post the complete source, sequence and export settings.

     
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    Feb 20, 2012 11:48 PM   in reply to Saad Khan

    Cripes, what I've seen looks in order. I don't think it is a hardware issue.

     

    Is the audio consistent, or does it drift?

     

    The Audio in the sequence is wav extracted from raw footage, no? Was the audio recorded in camera? Was it a multicamera shoot? Was the original audio\video file the same sampling frequency? Same fps as the sequence?

     

    And, if the audio was doctored outside of premiere, is there a chance that the time was altered?

     

    Are the audio and video locked together on the timeline? Was it locked throughout the process?

     

    Do you monitor the audio through the Blackmagic Decklink Intensity Pro while editing? Does the windows media player also use the card? I only ask because I had a matrox card that did this. If the Card's audio is looped back through the system, it could cause the delay in playback monitoring.

     

    The source sequence is 50fps and the output is 25 fps. Have you tried outputing a 50fps file? Is the source footage 50fps?

     

    If you export an un-edited source clip from the project, do you still get the issue?

     

    All those questions aside, it seems really strange that it plays fine on the timeline, WMP, and VLC, but QT and Vimeo don't work for you. Are you getting the exact sme delay in QT and Vimeo? Could you post a link to the vimeo page? Have you tried test a youtube upload. Have you tried a HD WMV, mpeg2 or DVD of the project?

     
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    Feb 20, 2012 11:55 PM   in reply to Saad Khan

    I'm starting to lean towards Jim's insight. Quicktime is no daisy. However I have never had issues with vimeo. As well as trying a 50 fps h.264 file, you might raise or lower the audio bitrate.

     
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    Feb 21, 2012 12:22 AM   in reply to Saad Khan

    The source footage appears to be AVCHgd  which I believe is a lite version of AVCHD.

     

    Wonder if this has any bearing on the issue?

     
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    Feb 21, 2012 11:17 PM   in reply to Saad Khan

    Do you have some still images on your timeline?  The only time that I have had this happen a group of stills was the cause.  It was not the audio that was affected, but the stills set at 6 seconds on the timeline, did not come out at quite that after encoding.

     

    The still image files did not appeaer to be corrupted - they opened and could be edited in Photoshop - but the only way round the problem was to go back to the originals off the SD card and re-edit them, and use these to replace the originals in the project.

     
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    Mar 2, 2012 3:25 AM   in reply to Saad Khan

    I have the same problem. quicktimes with h264, vimeo and youtube even.

     
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    Mar 2, 2012 4:56 AM   in reply to NathanMateer

    Disabling my blackmagic audio device and enabling it again fixed it for me. Also a restart had fixed it in the past but sadly not for long.

    Hopefully it'll not break again.

     
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  • Currently Being Moderated
    Mar 6, 2012 8:18 PM   in reply to Saad Khan

    Doh!

     
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  • Currently Being Moderated
    Mar 29, 2013 2:48 PM   in reply to NathanMateer

    How did you solve this? Everytime whether I export to .mov or mp4 from my project the audio is out of sync by  half a second. I have the BlackMagic as well. When I made a DVD or a Blu-ray the audio is in sync no problem. I'm not using the BM for audio just video. I am using the Adobe desktop for audio.

     
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    Mar 30, 2013 11:57 AM   in reply to Saad Khan

    No really cause my audio is in sync on the timeline and only out of sync when I make MP4 or mov's. It is only in sync when I export MPEG or MPEG for Blu-ray. It's a major bug with CS6 and I can't believe they don't fix this.....

     
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    Mar 30, 2013 6:36 PM   in reply to whiskey3

    I'm not sure it is a bug.  My exports always come out in perfect sync.

     

    What are you using to play back the files?

     
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    Mar 30, 2013 6:44 PM   in reply to Jim Simon

    I have RedONE 4K files in a 1920x1080 24fps 23.976 sequence. I full feature independent film in the Premiere CS6 timeline. It plays back on the timeline perfectly in sync but when rendered to anything but MPEG or MPEG for Blu-ray it is off by a half second or so consistently.

     
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    Apr 8, 2013 1:59 PM   in reply to whiskey3

    Did you get an answer @whiskey3?

    I am also encountering this Error With r3d Files, In a 1920x1080 comp! Plays back on timeline fine, But then h264 output, conistantly puts it 2 seconds out for me? any ideas?

     
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    Apr 8, 2013 2:08 PM   in reply to eyreadri

    No.... the only thing I found out is that if I render to MPEG or Blu-ray MPEG that is the only way that it stays in sync? Pisses me off? Adobe should fix this problem it is ********. If you find out anything from Adobe let me know?

     
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    Apr 16, 2013 3:30 PM   in reply to whiskey3

    Just to add to this thread. I have the same problem. Using CS6 with all updates on a dedicated desktop media i7.I didnt have this problem in CS5. I made 8 BDs with CS5.No problem. Now If I render with h.264 Blu-ray or h.264 Blu-ray legacy the audio is short by one second every 30 minutes(approx). If i use  MPEG Blu-ray it stays in sync.And its perfect, 30 min or 2 hours. Ive finally given up and just made this BD with mpeg blu ray. Surely Adobe will fix this. I cant tell the difference in video quality. Can someone explain the difference if there is one between H264 BLU RAY AND MPEG BLU RAY?

    Thanks Kent

     
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    Apr 16, 2013 8:53 PM   in reply to Kent Purdy

    Are you also using R3D files, Kent?

     
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    Apr 18, 2013 7:02 AM   in reply to Jim Simon

    Jim and all 9k plus viewers of this thread: Please read this though. Come on Adobe contributers, contribute!

    No R3D files, just plane vanilla AVCHD. BUT, I have some good information (as to why I think this out of sync problem is occurring) that may help others. My files are AVCHD 720p

    (1280 × 720   16x9 59.94   Progressive ). Put on a timeline that matches in PP CS6. As I stated before (If I export with h.264 Blu-ray or h.264 Blu-ray legacy the audio is short by one second every 30 minutes(approx).Using Preset H.264 HD720p 59.94.(Which should be a match to my footage.)

    After many tests with different presets I have found that by exporting from PP CS6 with Preset H.264 HD 1080i 29.97 the video and audio are a PERFECT match.

    Now to figure out why. I have discovered what may be the reason. I hope someone with a better understanding of what I am about to explain will expound upon it.

    When scrolling down my timeline one frame at a time, every two minutes it loses FOUR frames (or adds 4, not sure of terminology) . Example: 1min:59sec:59frames skips to 2min:00sec:04frames.This repeats EVERY 2 minutes. The only thing I can figure out is that using the interlaced preset takes these four frames into account, and the files then match.

    Ok lets have some discussion and maybe some clarity on what's happening here.(But it works,I guess that's what's important).

     
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    Jan 4, 2014 8:37 PM   in reply to Stephen_Spider

    Sorry, ahd another ?.  You mention to make sure the 'audio sampling frequency should be the same as the source footage. R u referring to whether it's 32 K or 48,000K?  If not, what are you referring to.

     

    I looked that the properties from the original source footage - audio : bit rate 384kbps, channels 2, audio sample rate 48kHz - which is the same as the output listed in the MEDIA  Encoder window

     
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