The reason I didn't just do that was because I was afraid that rotating
the image would rotate the picture itself. The photo is of me rappelling
and I didn't want to make it look like I'm rappelling sideways. And,
being blind, I would have no way to tell.
What I ended up doing was using the imagemagik "auto-orient" feature
while stripping metadata and resizing thusly:
$ convert original.jpg -auto-orient -strip -resize 1280x720 -background
black -gravity center -extent 1280x720 fixed.jpg
The guy who took the photo happened to stop by today so I just asked
him if the modified image still looked right -- it did. And when I used
ffmpeg to turn it into a short video segment, it came out 1280:720, same
as the video I took with my GoPro. I was then able to splice it into my
original video.
https://people.math.wisc.edu/~jheim/Climbing/video.mp4
At about the 5:10 mark, the guy at the bottom of the cliff asks me to
stop for a photo. It is that photo that I spliced in with a camera
shutter sound effe ct. Technically, it worked fine. I can't tell how it
looks though.
On 12/3/24 1:42 PM, Vincent Deconinck wrote:
This indicates that it should be rotated 90 degress clock-wise (I
think). Something in ffmpeg's chain is taking that into consideration,
and rotating the image, but not reporting it in the console output
Moritz is right.
With ffmpeg, you can get that "orientation" info with :
ffprobe -v error -select_streams v:0 -show_entries side_data="rotation"
snapshot.jpg
[PACKET]
[/PACKET]
[FRAME]
[SIDE_DATA]
rotation=-90
[/SIDE_DATA]
[/FRAME]
[STREAM]
[/STREAM]
Kind regards,
Vincent
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