IDVD keeps ejecting my disc before final burn can anyone help

Question

My iDVD movie keeps ejecting the disc before the final burn what can I do

Answer 1

• Material used: Video-Codec and Photo file format and Audio file format - matters too. I use
- Video - StreamingDV .dv or AIC
- Photos as .jpg (only)
- Audio as .aiff 16bit 44.1kHz or 48kHz (ONLY - never .mp3 or directly from iTunes - all converted to .aiff first)
With this I do not mean any setting in iDVD - BUT the raw material used in iMovie / FinalCut / Avid 100 / Adobe Premiere
As this usually matters - later in iDVD
How did You Export from Video-editing program used ? I prefer
• iMovie HD6 - just drop the movie project icon (NOT iMovie Icon - the PROJECT one) over into iDVD big menu window (avoiding - drop-zones as they are for other tasks)
• iMovie'08 to '11 - Share to MEDIA BROWSER - AND AS MEDIUM - not HD or other resolution as iDVD does a bad downscaling job.
• iMovie'13 (version 10.0.x) - Share as 480p - Import this into iDVD
• FinalCut (Pro or Express) - Export as QuickTime .mov - NO QUICKTIME CONVERSION - IMPORTANT
• Adobe Premiere - I don't know - not tested Yet
• Avid 100 - I don't know - not tested Yet
Cleaning the DVD-burner - If it Burns DVDs OK then that's may be not the problem - But if it only burns CDs OK then either the DVD-burning-laser is dirty or broken.
It is very easy to kill this DVD-laser as it over-heats if one burns several DVDs in a row. I only burn three at a time - then let it cool down for 30 minutes till next batch of three DVDs.
Yours Bengt W