Skip navigation
Howard Hoffman
Howard Hoffman
Currently Being Moderated

Cut and join m4v files

May 22, 2012 9:47 PM

Hi,

 

I am not sure if this is the wrong forum.  I have 2 m4v sources file.  A is 2 hours long.  B is 1 min long.

 

The project has already been created with A and it has a lot chapter markers.  The problem is that A has a section that needs to be replaced by B at the early part.  If I shorten A on timeline, append B and then add A again, I've have to redo all the chapter markers and poster frame.

 

Is there a tool that do this external, creating another m4v file to replace A without re-encoding?  this way I can just replace A and open Encore again.

 

Thanks

1069 Views   6 Replies   Latest reply: Howard Hoffman, May 31, 2012 6:38 PM
 
Replies
  • Jim Simon
    Currently Being Moderated
    1. Jim Simon,
    May 23, 2012 9:42 AM   in reply to Howard Hoffman
    Report

    You'll not only have to reencode, you'll have to redo all your chapter markers.

     

    Sorry.

     

    (Do NOT replace the current A clip with a new A clip outside of Encore.  If you need to replace A, call it something else, like A1, and do a proper Replace from inside of Encore.)

     
    |
    Mark as:
  • Howard Hoffman
    Currently Being Moderated
    2. Howard Hoffman,
    May 30, 2012 7:34 AM   in reply to Jim Simon
    Report

    I did the following:

     

    Shorten A on timeline to the point when B will be inserted

    Append B

    Append A again, this time removing from the start to the point where B is ending

     

    Everything works nicely, EXCEPT:

     

    Encore will write out A twice.  So now it's oversized and won't fit on the disc.

     

    Still searching for tool to split and join m4v files.

     
    |
    Mark as:
  • Jeff Bellune
    Currently Being Moderated
    3. Jeff Bellune,
    May 30, 2012 8:43 AM   in reply to Howard Hoffman
    Report

    Howard Hoffman wrote:

     

    Still searching for tool to split and join m4v files.

    It's called Adobe Premiere Pro.

     

    Jeff

     
    |
    Mark as:
  • Howard Hoffman
    Currently Being Moderated
    4. Howard Hoffman,
    May 30, 2012 8:50 AM   in reply to Jeff Bellune
    Report

    Yeah, that's the last resort.  I'd want to avoid re-encoding if possible.

     
    |
    Mark as:
  • Jeff Bellune
    Currently Being Moderated
    5. Jeff Bellune,
    May 30, 2012 9:16 AM   in reply to Howard Hoffman
    Report

    Howard Hoffman wrote:

     

    Yeah, that's the last resort.  I'd want to avoid re-encoding if possible.

    None of the Adobe apps* do smart rendering, which is what you are attempting to do.  Like Jim said, you will have to re-encode no matter what.  It's better to go back to the source file for re-encoding.

     

     

     

    *The 6.0.1 update to Premiere Pro does do smart rendering for a single, very specific file format.  It's for long GOP MPEG2 OP1a exports, where the original material is a matching long GOP MPEG2 OP1a or XDCAM EX file.  MP4 is not part of this smart rendering feature.

     
    |
    Mark as:
  • Howard Hoffman
    Currently Being Moderated
    6. Howard Hoffman,
    May 31, 2012 6:38 PM   in reply to Jeff Bellune
    Report

    Thanks for the advice.

     

    My trouble is that I no longer have source.  The encoded m4v is not of high bit rate so re-encoding will be quite bad.

     

    Using VideoRedo, I did the following:

     

    - mux m4v and ac3 into .ts (it can't open m4v and it does not like m2ts created by itself)

    - join A1 - B - A2

    - save result in ts

     

    So far, everything looks good as the result can be played in all kinds of player.

     

    Then the frustration begins

     

    Encore does not like ts (import superfast but says untranscoded)

     

    Use VideoRedo and save m2ts; Encore loads from 0-100%, but remains untranscoded

     

    Use VideoRedo or tsMuxerGUI to demux, Encore imports the result .h264 file but complains the encoder is not available

     

    Now I am stuck again and have to look for a different tool.

     
    |
    Mark as:
Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)

Answers + Points = Status

  • 10 points awarded for Correct Answers
  • 5 points awarded for Helpful Answers
  • 10,000+ points
  • 1,001-10,000 points
  • 501-1,000 points
  • 5-500 points