My DVD player LG-DV456 says it can understand “DVD/VCD/CD/MP3/JPEG/WMA/DivX/XviD” encoding formats, wondering whether it can play the files with MP4 extension.
Also can it play the files with AVI extension?
.mp4 usually implies using the h.264 codec, so in that case no. However, there are .mp4 files that use MPEG-4, part 2, which is what Divx is using.
AVI is also a container, that also support MPEG-4, part 2, but not all AVI files use it.
So, unless you try out, you will never know...