User`s guide

Table Of Contents
142
Trouble Shooting
Proper QT Movie
QT DV video must be 29.97 fps and audio must be either 32KHz for 4 12-bit audio channels or
48KHz for 2 16 bit audio channels. There are no exceptions to these rates.
The video must be compressed with DV codec. If the video and audio rates are incorrect, you
can fix it using QuickTime Pro by re-exporting the file with proper video/audio rates.
Capturing Bad DV Movie
Using MacCaption, when you capture a DV movie (.mov) from a DV tape using FireWire, if you
click on the [Start] button first
On the other hand, if you play the video from the DV tape first and then click on the [Start] to
save the video, then it captures at 29.97 fps and it will work.
to save the video and then play the video from the DV tape, the
resulting video will have an inconsistent frame rate. If you use this movie to add captions, you
will NOT get a good result.
Movie Time Code vs. Simulated Time Code
MacCaption can read the time codes from a DV video if the DV video contains time codes.
MacCaption can also simulate time codes by simply converting number of frames to time codes
either in Drop frames (DF) or Non-drop frames (NDF).
You have to be very careful which time code you use to time stamp a caption/subtitle file. If you
produce your final product from MacCaption, it does not matter which TC you use. But if you
export a file to be used with software like DVD Studio Pro or any other software, you must use
the same type of TC (DF or NDF). Otherwise you will notice caption/subtitle will slowly go out
of sync with time. For 1 hour video you will be off by 3 seconds and 18 frames.
There is way to fix this problem by using the functions like Convert TC (DF to NDF or NDF to
DF) and also TC Stretch/Shrink function.