[FFmpeg-user] creating a slideshow

[gheine at mathnmaps.com]

Some more information about this warning:

It only occurs when one image in the input list differs in size from  
the previous image.  If the dimensions are significantly different,  
visible distortion will occur.

Also, in contrast to my previous post, it appears that PNG images are  
bypassed with a warning.  JPG images do work; I don't know what other  
formats might be possible.

_______________________________________________
2017-05-01 09:25:52 UTC <ceffmpeg at gmail.com>

[swscaler @ 0x9d13040] deprecated pixel format used,make sure you did  
set range correctly
You cannot fix this warning and it should not trouble you.

Carl Eugen
_______________________________________________

ffmpeg -f concat -i input.txt -vsync vfr -pix_fmt yuv420p test.mp4

This did work.  "test.mp4" is a video with all the images, each  
displaying for about 5 seconds.  But ffmpeg gave the following  
complaint for each image:

[swscaler @ 0x9d13040] deprecated pixel format used, make sure you did  
set range correctly