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List:       kde-bugs-dist
Subject:    [kdenlive] [Bug 398121] New: Feature Request: Record new clip directly into timeline track during pr
From:       Eric Fontaine <bugzilla_noreply () kde ! org>
Date:       2018-09-01 6:49:08
Message-ID: bug-398121-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=398121

            Bug ID: 398121
           Summary: Feature Request: Record new clip directly into
                    timeline track during project playback
           Product: kdenlive
           Version: 18.08.0
          Platform: Other
                OS: All
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: User Interface
          Assignee: jb@kdenlive.org
          Reporter: ericrfontaine@hotmail.com
  Target Milestone: ---

I would like to be able to record a new video clip directly into a track of the
timeline while the rest of the project is playing back.

This functionality is built-in to any multi-track audio editor such as Audacity
or Ardour.  One important consideration is round-trip latency compensation to
account for the time that audio/video from playback takes to be heard/seen by
computer output plus the time for audio/video input takes to be grabbed by
ffmpeg.  Then when the clip is recorded, it is shifted back a number of frames
corresponding to this round-trip latency.  That way the recorded clip will be
perfectly in sync to what output the user was responding to.

I would be very happy to implement this, as this feature is something I
strongly desire as a musician who likes to overdub multiple instruments into a
video. Without this feature, I have to record audio into ardour while
separately recording video to a file, and then have to import every track into
kdenlive to sync with the video files.  I'm a contributor to MuseScore, so am
familiar with Qt and open-source development.

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