I asked Technical Support for the command line switches for PowerDVD 15 and they sent me the below
Local File Playback:
For Video, Photo, Music files, provide the file fullpath as the first argument of PowerDVD
PDVDLP.exe <filename>
The filename has to be quoted if the path contains space character.
Examples:
> PDVDLP.exe "D:\my works\birthday.mkv"
Starts PowerDVD and play D:\my works\birthday.mkv video
> PDVDLP.exe "E:\cyberlink.mp3"
Starts PowerDVD and play E:\cyberlink.mp3 audio clip
DVD, Bluray Disc (optical) Playback:
For DVD and Bluray optical disc playback, provide the drive letter as the last argument of PowerDVD following the first argument "AUTOPLAY" and disc type as second argument:
PDVDLP.exe AUTOPLAY <DriveLetter>
Examples:
> PDVDLP.exe AUTOPLAY DVD F:\
Starts PowerDVD and play DVD disc in F:\ drive
> PDVDLP.exe AUTOPLAY BD G:\
Starts PowerDVD and play Bluray disc in G:\ drive
DVD, Bluray Disc (HardDisk) Playback:
For DVD and Bluray disc folder playback, provide the full path as the last argument of PowerDVD following the first argument "AUTOPLAY":
PDVDLP.exe AUTOPLAY <path to root folder, index.bdmv or VIDEO_TS.IFO>
Examples:
> PDVDLP.exe AUTOPLAY F:\SomeBlurayTitle\
Starts PowerDVD and play Blu-ray folder rooted in F:\SomeBlurayTitle\
> PDVDLP.exe AUTOPLAY F:\SomeDVDTitle\
Starts PowerDVD and play DVD folder rooted in F:\ SomeDVDTitle\
Launch PowerDVD in Classic Mode or Cinema Mode:
To launch PowerDVD in a specified mode, provide "/LaunchProgram" as the first argument followed by the mode name, this option can be combined with the AUTOPLAY switch:
PDVDLP.exe [AUTOPLAY <DriveLetter>] /LaunchProgram <PowerDVD|PowerDVDCinema>
Examples:
> PDVDLP.exe /LaunchProgram PowerDVDCinema
Starts PowerDVD in Cinema mode
> PDVDLP.exe AUTOPLAY DVD F:\ /LaunchProgram PowerDVDCinema
Starts PowerDVD in Cinema mode and play DVD disc in F:\ drive