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[zerbob <520941@xxxxxxxxxxxxxxxxxx>]

Same bug reported as #680688, #590019, #769512 (by me) (I marked them all as duplicates).
The first frame of a clip shows when it shouldn't, both in preview and final output.
As it has been already said, it occurs when the project is somewhat complex, i.e. when there are a lot of clips (with cut sequences etc...) before on the track. An effective workaround is to move the clips to a new track, which isn't very practical in the long run.
The 'first frame bug' (as I call it, it seems the 'last frame bug' is somthing else) can affect:
- Rotations, animations, scalings of clips
- Transitions (only from upper to lower track it seems)
- Cut clips (you cut out the beginning of a clip, but the first frame of the raw clip shows nevertheless. I'm not sure for this one but I think I saw it)
- Multiple tracks (first frame of lower clip shows over the upper clip)
thus preventing you from using any of those features, which makes impossible any complex project.
The bug occured for me with mlt 0.5 as well as 0.6 and 0.7, and openshot 0.9, 1.2, 1.3, on ubuntu 32 bit 10.04, 10.10 and 11.04. I think it comes from openshot and not mlt (I can't find any kdenlive bug report about it).
I think it really needs to be fixed, because it makes openshot impossible to use for large projects, whereas openshot is otherwise great software and by far the best (and the nicest) video editor available for linux (another problem with large projects is that the more complex the project, the longer the lag when you try to move the cursor, but that's not so important).

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https://bugs.launchpad.net/bugs/520941

Title:
  Fade in/out glitches

Status in OpenShot Video Editor:
  New

Bug description:
  Hi,

  I don't know if anyone else has experienced this, but now and again
  (not all the time) my fades in and out glitch at the outer end: before
  a fade in, the image or video appears momentarily (probably just for
  one frame) then disappears, and the fade starts normally. Similarly at
  the end, with the final frame flashing up full brightness.

  It also seems to some extent to happen on audio - it's like OpenShot
  realises a moment too late that it's not meant to be playing the
  audio, or that a fade is meant to be happening.

  Sometimes it doesn't happen, and sometimes it fixes itself...
  unfortunately not on a 'quick' project I've been doing this morning!

  Anyway. It's absolutely great work - I'm so impressed! Something as
  good as this, and non-linear (I can't understand what you can even do
  with linear editing!) is a joy to have!

  Ubuntu 8.04
  DEB 1.0.0

  Again - great application. I've already done some stuff I'm really
  pleased with!

  Cheers,

  Mike

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