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Dropped frames during timeline playback

May 1, 2013 7:38 PM

I have had playback issues with dropped frames in real time ( without rendering) of AVCHD files in the timeline for two years now. I have tried to find a solution to the problem but I was not able to. So I kind of lived with it and I have been just rendering the working area which is a real pain in the neck because I have to do that every time that I make changes to the clips I work on. A couple days ago I decided that I would shop for a better computer. I contacted a few companies. The one that makes PROMAX computers the guy who helped me asked me the reason why I wanted to buy a new computer and after I explained the problem I was having he told me that even a powerful computer like the ones that they sell might not fix my problem and that I should first find a solution to my problem.  I think it was nice of him to tell me that rather than just sell me a new computer. So here is my problem. I have an AVCHD file which I shot with my Sony NX5U videocamera. Its total length is about 5 minutes and the size is 355mb. 1920x1080 24p. I imported it in Adobe cs6 and I created a sequence made of 3 clips on 3 tracks of about 20 seconds each long . Each track has 2 accelerated effects on it ( ultyra key and crop).  When I playback this particular sequence it will play beautifully all the time even if I add 3 more effects on each track. So far so good. Because this is going to be a commercial I started creating new sequences of the same length and from the same original AVCHD file. Same procedure on the same computer. Well I  have created about 10 new sequences and they all drop about 356 frames during the playback in the timeline. But if I playback that particular sequence that I was telling you about it plays perfectly. When I bring up the task manager to see what the cpu  was doing while the frames were dropping the cpu was at 80%.When immediately after I played back the good sequence  the cpu was only  at 15-20% . I ran msconfig and I stopped some running applications but it still did not solve the problem. And finally last night while I was troubleshooting the problem I discovered that all of sudden all the 10 sequences that were not playing back correctly they all started playing fine for a few minutes but then they started dropping frames again except the first sequence that plays fine all the time. Please correct me if I am wrong. If it was a cpu problem since all the sequences are all the same size and same everything then they would all have the problem so then why there is one that I do not have any problem? I would appreciate if anyone would help me with this You can find my computer specifications under my profile. Thank you, Umberto.

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    May 2, 2013 7:11 AM   in reply to donnanup

    >find my computer specifications under my profile


    People who post help messages are volunteers, not Adobe employees... I doubt that anyone will take the time to go somewhere else and come back to your question


    If you answer all of the questions here, someone may have an idea of how to help - Information FAQ

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    May 6, 2013 10:53 PM   in reply to donnanup

    Are you using the same clips in the new sequences, or different clips?

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    May 7, 2013 9:31 AM   in reply to donnanup

    It might do to get some terminology hashed out.


    On the hard drive, it's called a file.  Inside of PP, it's called a clip.  In the sequence, it's called a Clip Instance.  It sounds like you're using the same clip as source media for the new sequences, just different parts of it.  Is that correct?  How long is that original clip, in it's entirety?

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    May 7, 2013 9:43 AM   in reply to donnanup

    OK.  That's not long enough to cause the problem I suspected.


    Unfortunately, I'm now at a loss for an explanation.

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