[FFmpeg-user] -metadata changes file size: WHY?

Seattle Chaz seattlechaz at gmail.com
Tue Jan 10 00:31:06 CET 2012

Greetings all:

Question about unexpected outcome of inserting a metadata title into a

Start with 3k .bmp images - render to video.mp4 : size = 90+ mb
overlaid video.mp4  with logo: size = 90+ mb
Add video.mp4 audio and a title image via openshot: size = 90+ mb

insert -metadata title into video.mp4 : size = 17 mb???

So far as I can tell, there has been no audio or video degradation.
What the h - e - double hockey sticks is happening here?

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