I would like to know if there are any open source libraries to convert a set of images to video (not .MP4),other than ffmpeg. I need to use this library in my android app hence being compatible for this environment as well.
Any suggestions in this regard will be appreciated
You can try JCodec. It's an open source pure java implementation of video and audio codecs and formats.
Or Xuggler API can also be used but since you're looking for something other than ffmpeg, this might not be your cup of tea as Xuggler extensively incorporates FFMPEG in its functionality.