[FFmpeg-user] here's a youtube to show what i mean
Stefan Scott Alexander
stefanscottalexx at gmail.com
Thu Oct 27 06:48:01 CEST 2011
I uploaded the AVI that I'm trying to process - it's here on YouTube:
I don't want to output another video -
I just want to output a list of all the frames which are different from the
(the list could be either timestamps, or frame numbers).
This is a very simple video - just text.
It's a video screen capture of a computer running speech synthesis software.
Notice how the highlight on each word in the text is perfectly synchronized
with the speech.
The word currently being spoken = the word currently being highlighted.
So I whenever the highlight "jumps" to the next word,
that's the frame number (or timestamp) I want to output to a text file.
Can ffmpeg do this?
I was thinking I could use showinfo and checksum... If two frames are
different, they should have a different checksum.
So maybe I could use showinfo and output all the frames, and all the
Then use another program to process this text file, to find which frames had
a different checksum from the preceding frame.
I know this is also called "scene change detection" in video applications.
This case should be really simple, because there's almost nothing moving in
the video -
only the highlight moves.
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