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PS21Ult export momentary audio dropout at cuts.

Last post 01-22-2020, 9:15 by Tony P. 19 replies.
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  •  08-11-2019, 12:34 786879

    PS21Ult export momentary audio dropout at cuts.

    Attachment: Export 10Aug2019.png

    Hi,

     

    Have a project 12 minutes long with 6 timelines, a separate audio track, Titles track and timer track.

    For editing purposes, I do not separate any track into video/audio. Except for two tracks, all other tracks have their sound muted. There are edits approximately every 10s and the cuts appear on all video tracks. For the purpose of selecting what track is to be visible, I use the "Active Streams" uncheck "Video" for blanking clips above the desired clip further down in the timeline. The separate audio track is not subject to cuts.

    In edit mode, the problem noted below does not occur.

    However, on Export (using the Export properties in the attachment with a file size of 1.73GB for a 12 m video),  there is a momentary sound dropout in transition from one cut to another on playback. While it does not appear to be present in all cuts, it is there for a significant number. Clearly, the higher the volume, the more discernible dropout.

     

    Before I start experimenting, any ideas? 

     


  •  08-12-2019, 8:48 786894 in reply to 786879

    Re: PS21Ult export momentary audio dropout at cuts.

    I'm assuming everything is 60P on the timeline.

     

  •  08-13-2019, 15:23 786974 in reply to 786894

    Re: PS21Ult export momentary audio dropout at cuts.

    Hi Tony,

     

    Yes..all 60p. Now I did an experiment!

    The same problem has arisen on another project all the same settings except it's an 8 minute movie approx.  Momentary dropout at all the cuts of the exported version.

    This movie is in real time. By that I mean that there are no "time" cuts. In other words, editing starts at "x" seconds in from the introduction and continues for the rest of the movie with no time jumps (if that makes sense) .

    I edited the movie in the usual way (cuts every 10 - 20s) and there is no problem when playing within PS21Ult. Playing the exported version again displays the dropout problem.

    So, painstakingly (and without going into the detail), I detached the entire audio track from the video track; placed it on its own timeline; deleted all but the first clip; and then extended the first audio clip to the end of the movie. Thus, the audio clip has no cuts.

    Result: no dropout on Export playback.  

    However, the solution is a pain. With that information any thoughts?

    Thanks.

     

     

  •  08-14-2019, 6:18 787032 in reply to 786974

    Re: PS21Ult export momentary audio dropout at cuts.

    Hmmmm... I have no long 60/50P footage to work with. And with each new version of PS, I usually "upgrade", so only work with the latest version.

    But I do have PS21U on my computer. If you can upload an 8 min movie somewhere, I'll try it on my end and report results in both PS21 and PS23, ok?

  •  08-15-2019, 6:40 787088 in reply to 787032

    Re: PS21Ult export momentary audio dropout at cuts.

    Thanks Tony. The described work around seems to solve the problem. I'll try to give you short footage in both versions where you can hear the problem.
  •  08-15-2019, 6:50 787091 in reply to 787088

    Re: PS21Ult export momentary audio dropout at cuts.

    Ok. Include the workflow you used too.
  •  01-20-2020, 12:58 794185 in reply to 787091

    Re: PS21Ult export momentary audio dropout at cuts.

    Attachment: Audio comparison.png

    Hi Tony,

     

    I still have the audio dropout and this time my work around will not solve it.

     

    In Audacity, the top two tracks of the attachment are taken from playback while using the editing software. The bottom two tracks are taken from an exported version. You see where I've place the arrow? That is an example of audio dropout in the exported version not present in the editing version that occurs at a cut at that point. You can hear the Studio editing audio track here: https://drive.google.com/file/d/1iDIbVspkgKF-SFcLJBVtC3YabTXpk6Qp/view?usp=sharing      and the exported version here:  https://drive.google.com/file/d/1ISCEGzyXvje0XqGUZw_COqZqOb7D3vA1/view?usp=sharing           Listen at about 7s -8s for the dropout on the latter. In the next post, you will see the export parameters.


  •  01-20-2020, 12:59 794186 in reply to 794185

    Re: PS21Ult export momentary audio dropout at cuts.

    A picture taken from the editing software

  •  01-20-2020, 13:01 794187 in reply to 794186

    Re: PS21Ult export momentary audio dropout at cuts.

    Attachment: Export parameters.png
    Export parameters

  •  01-20-2020, 13:26 794189 in reply to 794187

    Re: PS21Ult export momentary audio dropout at cuts.

    In your original posts, the footage was 60P. Export is different, why? Also why 100Mbit/s export?

    I heard a "skip" at 3 second and 7-8 second.

     

  •  01-20-2020, 18:51 794196 in reply to 794189

    Re: PS21Ult export momentary audio dropout at cuts.

    Thanks Tony.  In the earlier observation, the vidoe fps was 60; in this case, it's 30. In relation to 100MBit/s, why not? Do you have a suggestion for a lower figure, Why? An how would that parameter have an effect on the audio component of the video track?

     

    You are very observant. There is indeed a cut at about 3s; I was giving the break at 7 - 8s as an example. The work around in the last case was having a music track which was  not subject to any cuts and the audio tracks associated with the video were at such a low level as not to be noticed. In this case, I need a louder video associated  audio track  which video is, as you might expect, subject to a significant number of cuts and hence a more significant problem.

     

    Thanks. 

  •  01-21-2020, 5:06 794209 in reply to 794196

    Re: PS21Ult export momentary audio dropout at cuts.

    If you zoom into the timeline to single frame, are there any gaps?

    As for 100MBit/s export, unless your original video was recorded at that bitrate, exporting at a higher bitrate than what the original video is does nothing but take up a lot more hard drive space. 

  •  01-21-2020, 8:01 794211 in reply to 794209

    Re: PS21Ult export momentary audio dropout at cuts.

    Thanks Tony.

     

    No gabs; see the attachment. Besides, if there was a gap, it would be heard on the editing version of the project. The gap arrives on the exported version. Point noted about the 100MBits/s. Have you a suggested figure?


  •  01-21-2020, 8:53 794214 in reply to 794211

    Re: PS21Ult export momentary audio dropout at cuts.

    First, bitrate export. If the video is recorded at 28MBit/s, use that.

    Where the audio is dropping out, which track is it in the screenshot?

  •  01-21-2020, 10:13 794216 in reply to 794214

    Re: PS21Ult export momentary audio dropout at cuts.

    The Audacity screen shot I sent earlier is from the middle track and the dropout (always) occurs at a cut. The snapshot " From editing at 1s speed.png", the problem occurs at the cut. I've silenced the middle track and increased the volume on the other two and the problem also occurs emphasizing that this is an example.
  •  01-21-2020, 11:44 794225 in reply to 794216

    Re: PS21Ult export momentary audio dropout at cuts.

    what if you add a cross dissolve at that point to the audio?
  •  01-21-2020, 18:31 794238 in reply to 794225

    Re: PS21Ult export momentary audio dropout at cuts.

    The problem seems to have disappeared. I don't know why. I started to experiment with having the sound muted on all tracks except the "middle" one and exported it. That seemed to solve the problem. Then I started to unmute each of the other tracks in turn and exported the project; the problem was absent. Finally, I unmuted all tracks (changing none of the export parameters), the dropout is not present. I didn't need try the cross dissolve.

    How that solved the problem, I don't know. If it reoccurs on another project, I'll update here.

    What is interesting is that this 4.5 minute project had an export size of 1.994 GB when there was a problem to a size of 2.002 GB without the problem.  

     

    Thanks for your help.

  •  01-22-2020, 7:05 794259 in reply to 794238

    Re: PS21Ult export momentary audio dropout at cuts.

    The wonders of a "new day".

    Curious as to if you tried exporting at a lower bitrate, the size of the file would not be 2GB. Where is the final product going to be distributed? Still using 100MBit/s?

  •  01-22-2020, 8:58 794268 in reply to 794259

    Re: PS21Ult export momentary audio dropout at cuts.

    On the next project, I'll use a lower bitrate and experiment. The project is exported to YouTube. I've noticed that there is a better quality picture and sound if I use the higher bitrate. I am sure that YouTube automatically adjusts the rate to suit their site. 
  •  01-22-2020, 9:15 794269 in reply to 794268

    Re: PS21Ult export momentary audio dropout at cuts.

    I export to youtube all the time and the quality has always been great, even when the youtube playback is on a flat panel tv. Experiment for sure. I usually export at the bitrate of the video files.

    With 4K exported videos for youtube, I've yet not used the full bitrate of the videos, but something smaller. The videos are 100MBit/s, but exported bitrate is 40MBit/s. Quality has been great when video on 4K monitor.

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