The VideoLAN Forums

for jpeg part you can use the scene video filter, however I have not tried it in VLM mode

you can use the scheduling function like this for the video part: !!!always put the stop schedule first for each channel, so the last play will be valid on startup hence giving a good initial file. this will create 15 minutes files with 2s gaps between new sch_channelname_stop schedule enabled setup...

VLC does not create file names based on format strings given by %Y,%m,%d,%H,%M,%S variables.
I experienced it both in VLM an in command line mode.

Files are created as XXXXXX-%Y-%m-%d.mp4 for example.

Thanks