Hi,
The specs for PD14 are here:
https://www.cyberlink.com/support/product-faq-content.do?id=18605
The specs show multiple audio stream import is only available for specific file formats :
2D Video: MVC (MTS), MOD, MOV, MOV (H.264), Dual-Stream AVI, MPEG-1, FLV (H.264), MPEG-2,
MKV (multiple audio streams), MPEG-4 AVC (H.264), 3GPP2, MP4 (XAVC-S)*, AVCHD (M2T, MTS), TOD, AVI, VOB, DAT, WMV, DivX**, WMV-HD, DV-AVI,
WTV in H.264/MPEG2 (multiple video and audio streams), DVR-MS, DSLR video clip in H.264 format with LPCM audio, H.265/HEVC (MP4/MKV/M2TS)*
3D Video: Dual-stream AVI, MVC*, Side-by-Side Video
, Over/Under Video
Is it possible to save your files in another appropriate format for import?
PD15 has similar import specs here:
https://www.cyberlink.com/products/powerdirector-ultra/spec_en_US.html
Cheers
PowerDirector Moderator