Maybe a simple question about M2T ?

Hi
I record in HDV on the JVC GY 101.
I store on the Focus Enhancements DR HD100 Hard disk recorder.
The footage I have is in HDV 25frames Progressive.
The hard disk stores as m2t file and I seem to need to use Mpeg streamclip to convert for Final Cut Pro HD.
I have a few questions about this.
1) What should i convert to with mpeg streamclip ? mov, dv m2v etc etc
2) What setting should I have on FCP with regards to screen size ? The converted clips are 1280x720. When I choose this setting on the sequence, I end up with small black bars left and right of the video on the canvas ???
3) I will also later have to add some digi beta footage which will be PAL, 720x576 Anamorphic.
4) What is the best resolution for me here ?
5) And will the quality of the original m2t file be downgraded by the mpeg streamclip ?
Thanks so much for your help
All the best
Simon

HDV isn't an "edit-friendly" format, meaning: HDV uses inter-frame compression, combined with a long group-of-pictures (GOP) of 15 frames (12 frames in PAL-equivalent). In intra-frame compression (as in DV, DVCPRO HD, etc.), each video frame is a complete image that stands alone. Inter-frame compression (which is also used in DVDs) uses only a limited number of complete image frames, the GOP determines that number. So, in HDV for example, with a GOP of 15 frames, 1 second of 30fps video contains only 2 complete frames, while the other 28 frames are determined by calculations used in conjunction with the Bi-directional ('B') and Predicted ('P') frames, which contain partial information on the changes in the video in between the 'I' frames which contain whole images. This process, of course, requires much more computer processing power than when editing DV, DVCPRO HD, Uncompressed, etc.
Editing video streams such as HDV (and XDCAM HD) is made difficult by the reduced number of I-frames. For example, if you make a cut in between the I-frames in the video clip, the computer has to then recalculate new I-frames that are placed at both sides of the cut. Converting on capture/after import to an intra-frame codec like DVCPRO HD, ProRes 422, or Uncompressed will reduce processing power and increase real-time performance, as well as give better performance when adding effects and performing compositing like chroma-keying.
A common rule of thumb in professional applications is to acquire in HDV, XDCAM HD, etc., but capture and edit in DVCPRO HD, ProRes 422, or even Uncompressed. Native HDV editing is not taboo by any means; it's just not as easy or robust -- especially with the LONG render times. Depending on what kind of work you do (and of course personal preference), you may not see much benefit by transcoding to another format.
Are you suggesting i have to convert each clip after capture?
Unless you have an HDV deck with HD-SDI and a capture card, you would have to convert each clip. Batch-conversion would be very useful for that.
Hope that helps.
tim

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