Lightroom: 3.4 unable to create slideshow video with soundtrack. I created a voice over for my slide show so that I can send the file to relatives to watch. Voice over created with as an iPod voice memo. That created a .wav file which LR does not support. Annoying, but fair enough. Next step was to create a .m4a file which LR claims to support. That runs within LR, but crashes when I attempt to create a video file (the intended recipients do not have LR). Error text: Log (6) Assertion failed: self->aenc info: Creating MainConcept H.264/AVC video encoder ... info: Version: 188.8.131.52059 info: Platform: OSX info: Using library: MainConcept optimized Software Encoder (mc_enc_avc.001) extendedOption: media_time_offset : 0.000000 -> 1000.000000 End error text Third step was to try a .mp3 file. That comes up with an exclamation sign beside it, and will not run withing LR. It also crashes the "create a video" subroutine within LR. Different error to above. I could find no explanation of what the exclamation means. I tried the help, clicking, double clicking and right clicking.
Both conversions were from the original .wav file by WavePad Sound Editor v4.5.1 using default options in the SaveAs dialog box LR3.4 Mac OSX 10.6.7 I have tried two machines - a MacPro i5 and an iMac Core Duo