Thanks a lot, learnt various ways of joining videos , well explained. One question , I have 6 separate mp4 videos for each topics. Now wanted to joins all these videos in one mp4 with text and number displayed till end of that video, for example, first videos with text "Topic 1" till end of first video, once second videos start's text changes to "Topic 2" and ... so on.
Thanks a lot, learnt various ways of joining videos , well explained. One question , I have 6 separate mp4 videos for each topics. Now wanted to joins all these videos in one mp4 with text and number displayed till end of that video, for example, first videos with text "Topic 1" till end of first video, once second videos start's text changes to "Topic 2" and ... so on.
Check out the drawtext filter that ffmpeg has, that should do the trick.