I'm trying to speed up the playback of mp4 video files. I'm able to speed-up playback on Windows using VLC but I'd like to convert the file so it will always play 1.25 faster than normal speed regardless of what software it is being played in.
I have had some success using Sony Vegas for this task but I'd ideally like to find something that would run a batch process to convert a number of videos. Does anyone have any suggestions?