I have a folder with 1000 different videos.
I want to merge these 1000 videos with a simple clip. The clip is identical for all the videos and is to be added to the end of the video.The clip contains the credits for the video. Encoding is not necessary, if they can be "baked" together without encoding then I will save some time. It does not matter which format the 1000 videos are in. I can do then in wmv, avi, mpeg, whatever. I need to process thousands of videos every day, so a batch command is needed.
Video A + clip Z
Video B + clip Z
Video C + clip Z
Concatenating videos isn't always a trivial task, and more information is needed to answer your question. Are all of the inputs the same format? What is your OS? Please show some information about the videos and the clips with ffmpeg: ffmpeg -i video.mp4 -i credits.mp4
The resulting console output will contain useful information on how to proceed.