Why do I have to render MiniDV footage?

Here's my problem. I have MiniDV footage that I have log and captured with Final Cut Pro. I imported the footage, used easy set-up to create a NTSC-DV anamorphic sequence, but when I drag the files onto the time line a red line appears for the audio tracks, requiring me to render them every time. My files were imported as they should be at 48Khz, 16 bit, and the audio format is 33-bit floating, for both the clips and sequence but the red line comes up no matter what I do. Anyone know why this is happening?

Well Michael was right about the 32-bit Floating Point being suspect. The project that I'm working on encompasses about 15 hours of MiniDV footage. I started working with some of the clips that I shot earlier on in the process and when I dropped them into the sequence there was no render issue. When I checked their specs, it turns out that those clips are in the 16 bit integer audio format as opposed to the 32-bit floating that some of the later footage is in. I'm not sure what caused the difference in audio format. I used the same camera, with the same audio settings. I noticed in the finder window that the file type for those 32-bit floating files is called 'DV Movie' and there's a .dv at the end. Very weird. I'm 99% sure that I imported them all with final cut not imovie or anything, but who knows. I guess I'll re-import those clips again, since it seems to only be about 20% of my footage that is in this format. Thanks for everyone's input.

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H TheGamer
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Timeline rendering is a preview matter. It does not fix anything, but it is your window of opportunity to catch of problem sooner than latter. If the Timeline rendering indicator displays orange (11 or higher) for the line above the Timeline content, that is the project telling you that you are not getting the best possible preview of the playback of that content in the Edit area monitor. And, every time you edit a file, you have altered the file from the time before. So, if you want to see the best possible for what you now have, you Timeline render. This is particularly helpful when you are dealing with titles, effects, transitions, and non native formats. You cannot turn off the Timeline render indicator system, at least none that I have ever found nor seen reported. You can do selective Timeline rendering by having the gray tabs of the Work Area Bar span only the Timeline segment that you want Timeline rendered.
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I am not approving or disapproving of this project feature, just commenting on the what is.
This is not Adobe. Rather user to user. If you want to have your voice heard at Adobe, you might consider filing an Adobe Feature Request Bug Report Form.
https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform
Please consider.
ATR
Add On...it is also possible to do Timeline rendering in a project, save close the project, and reopen it to find your previously "green" lined content now "orange", indicating unrendered. Yet the preview files generated originally by Timeline rendering are still existing in their hard drive save location. That is another story for other time.

Why do I have to render MiniDV footage?

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