[FFmpeg-user] Problem creating video segment from still image

[John G. Heim]

I am blind but I'm trying to create a promotional video for my disabled 
rock climbing group. I would like to insert a still image into the 
video. The video has resolution 1280:720 so I resized the image to be 
less than 1280x720. ffprobe seems to indicate this worked:

$ ffprobe -v error -select_streams v:0 -show_entries stream=width,height 
snapshot.jpg
[STREAM]
width=960
height=720
[/STREAM]


When I use ffmpeg to create a 2 second video from the image, it seems to 
flip the XY dimensions:

$ ffmpeg -loop 1 -i snapshot.jpg -c:v libx264 -t 2 -pix_fmt yuv420p -y 
snapshot.mp4

$ffprobe -v error -select_streams v:0 -show_entries stream=width,height 
snapshot.mp4
[STREAM]
width=720
height=960
[/STREAM]


Am I doing something wrong?   I can't just look at it to see if it looks 
right because I'm blind. Here are links to the still image and the video 
I created:

https://people.math.wisc.edu/~jheim/Climbing/snapshot.jpg

https://people.math.wisc.edu/~jheim/Climbing/snapshot.mp4