I have a bunch of AVI files with the same audio codec, video resolution, but the video codecs are different: they have fourcc xvid, mp42 and dx50. Is it safe to concatenate them, i.e. is there a video decoder which is compatible with all these? Which fourcc should I use?
One of these things is not like the others: mp42 is not the same as xvid or dx50. The latter 2 are MPEG-4 part 2 while mp42 is a custom, incompatible variation by Microsoft.