• Adobe Premiere Pro

  Luminance problem when making loops in Premiere CS5

  Posted by Dave Hiebert on December 4, 2010 at 4:47 pm

  I have made a bunch of background loops in After Effects CS5 and exported them as mp4’s. They work great. One of the presentation programs that my client uses cannot import mp4’s but can import wmv’s. I have imported the loops into Premiere CS5 and re-rendered the mp4 loops into wmv’s. For some reason, the first frame of the wmv loops seem to have about half the luminance that the rest of the frames do, which, of course, makes for a bad loop transition. I have tried other loops and re-renedered and have come across the same problem. Again, the mp4’s are loop perfectly…..first frame is correct.

  Any ideas?

  Thanks,
  Dave

  Dave Hiebert replied 15 years, 5 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Tim Kolb

  December 4, 2010 at 10:57 pm

  Well… WMV can be odd, but have you tried the file in another player?…Windows Media Player can be odd as well.

  Also…have you tried rendering the wmv from the original project source for the H264s? Taking one temporal compression system and feeding another could be an interesting set of oddities as well.

  My last suggestion would be to attempt the conversion in the free standing Windows Media Encoder.

  …I am assuming that there is no interlacing involved here by the way…

  TimK,
  Director, Consultant
  Kolb Productions,
• 

  Dave Hiebert

  December 5, 2010 at 2:20 am

  Thanks for the quick reply. I tried all of your suggestions…..nothing really helped. I found, however, that when I rendered it from Windows Media Encoder it cleared up the luminance problem, but created a slight stagger on frame 1 instead. So , again, not really usable.

  …..sigh.
• 

  Tim Kolb

  December 5, 2010 at 8:33 am

  Yeah… Overall, I’m not certain that WMV is necessarily a file type that can loop flawlessly in this way…I have no experience working with a WMV as a loop…or at least not a short one. (Seeing a hitch every half-hour isn’t so bad if you’re running a repaeting program at a tradeshow, etc…)

  Is there a reason why WMV is necessary, or can you deliver an alternative?

  TimK,
  Director, Consultant
  Kolb Productions,
• 

  Dave Hiebert

  December 6, 2010 at 4:33 pm

  The presentation software that is being used can import either wmv or mpg. The mpg seems to stutter for a second on the first frame as well. That is perhaps a flaw in the software itself.

  Thanks for your help.

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