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federomano
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Still images from Camtasia to Premiere

Apr 30, 2013 12:00 PM

Tags: #export #quality #bitrate

Hi, ive searched this problem in the forum but havent found any answer to it. Maybe because its not a problem i could easily define, or because of my bad english, anyways, sorry about that.

 

The thing is ive recorded a Power Point presentation with Camtasia, and encoded it for re editing with Premiere, for adding some intro animation and other little stuff i cant do in Camtasia. The original mp4 (h264) video generated by Camtasia is 160mb aprox for 1hr video, and it looks very fine, but when i produce in Premiere, things get ugly. Ive used the same codec (h264-mp4) but if i want the video to have the same filesize (160mb) i have to lower the min bitrate to 0.3, and the video has constant blurry images each 1,5 sec, like heartbeats. You can see an example herehttps://dl.dropboxusercontent.com/u/51216709/prueba.mp4 watch the image on top left, you will see what i say.

 

So this is my problem, of course i could increase the min bitrate but the filesize gets much bigger, i cant understand why i cant get the same quality with the same filesize. And i know i must be missing something, all the videos i need to produce are from Power Points presentations, so you could imagine that i dont need lots of keyframes because the video has mostly still images. But im also new to this software and i may be missing lots of things.

 

So thank you in advance for your answers.

Sorry again for the english and hope you can help me.

 
Replies
  • Currently Being Moderated
    Apr 30, 2013 3:25 PM   in reply to federomano

    Your English is excellent -- no worries!

     

    Export from Camtasia as a lossless AVI file (using the Lagarith or UT codec), edit that in Pr, and then export to H.264 from Pr.  Part of the problem is that you are encoding the screen recording once to H.264 in Camtasia, then encoding the H.264 again to H.264 in Pr.  That causes an unnecessary loss of quality.  There are probably some export settings in Pr that are adding to the loss of quality.  If you post a screen shot of your Pr export settings for H.264, we may be able to spot something you can change to get better results.  We also need to know the dimensions and frame rate of your video from Camtasia as well as your sequence settings in Pr.

     

    If all else fails, you can encode to a visually lossless MOV file using the Photo-JPEG codec and use Handbrake to encode to H.264 using the x264 encoder.

     

    All of this info assumes you are using a Windows computer and not a Mac.

     

    Jeff

     
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  • joe bloe premiere
    4,391 posts
    Dec 6, 2009
    Currently Being Moderated
    Apr 30, 2013 3:23 PM   in reply to federomano

    Jeff,

    Broken link for Lagarith.

     

    Lagarith Lossless Video Codec

    http://lags.leetcode.net/codec.html

     
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  • Currently Being Moderated
    Apr 30, 2013 3:26 PM   in reply to joe bloe premiere

    Edited.  Thanks.

     

    Jeff

     
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  • Currently Being Moderated
    May 1, 2013 6:18 PM   in reply to federomano

    Three things:

    1. Uncheck all of the boxes at the bottom of the export settings dialog.  In this case, you don't need Maximum Render Quality or Frame Blending, and you certainly don't want to use your Preview files.  If you've rendered any portion of your timeline while editing, Use Preview Files will probably destroy the video quality.
    2. If you still get the "heartbeat" effect after that, try setting the keyframe distance to 150 frames (5 seconds for 30 fps video).  It may seem counter-intuitive, but more keyframes eat up more of your available bits and leave less for the in-between frames.  Increasing the keyframe distance helps balance the available bits between keyframes and dependent frames.  With such a low bitrate, that could be very important.
    3. Try increasing your max bitrate.  You'll still get a file about the same size, but the encoder can allocate more bits in the spots that need it and fewer bits elsewhere.  Screen recordings often have many spots where very few bits of data are needed, and the bits saved can be used for more complex frames.

     

    Jeff

     
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