MEncoder is capable of creating movies from one or more JPEG, PNG, TGA, or other image files. With simple framecopy it can create MJPEG (Motion JPEG), MPNG (Motion PNG) or MTGA (Motion TGA) files.
Explanation of the process:
MEncoder decodes the input
image(s) with libjpeg
(when decoding
PNGs, it will use libpng
).
MEncoder then feeds the decoded image to the chosen video compressor (DivX4, Xvid, FFmpeg msmpeg4, etc.).
Examples. The explanation of the -mf option is in the man page.
Creating an MPEG-4 file from all the JPEG files in the current directory:
mencoder mf://*.jpg -mf w=800:h=600:fps=25:type=jpg -ovc lavc \
-lavcopts vcodec=mpeg4:mbd=2:trell -oac copy -o output.avi