I am a total newbie here and using Mac. So I made a test animation and I have tried to export it as a film file. I render with ffmpeg and changed the file to .avi. But when I render, only 1 second of the animation is exported, even though it is 120 frames, and therefore should be 5 seconds. What am I missing?
Press F9 (opens Render Settings) and go to ‘Time’. Check that both ‘Frames per Second’ and ‘Duration’ match your expectations.
If that does not fix the problem try exporting as something else, for example as a gif. (Also leave the target as auto and only adjust the file ending)