Ffmpeg - Create a Video from Image Frame with a Start and a Count
Using Ffmpeg, I Made a Video from Multiple Images with the Below, Which Works, However I Don't Want to Use All 200 Images in My Folder, Wanting the Video to...
Using ffmpeg, I made a video from multiple images with the below, which works, however I don't want to use all 200 images in my folder, wanting the video to contain only images from 1 to 100:
ffmpeg -start_number n -i test_%d.jpg -vcodec mpeg4 test.avi
How can I specify the number of frames to include in the video, or the number of the ending frame?
2 Answers
You do this by stating the number of frames you want with -vframes 100:
ffmpeg -start_number 1 -i test_%d.jpg -vframes 100 -vcodec mpeg4 test.avi
- You might need to specify other parameters such as
pix_fmt, etc. depending on other factors, and usually one uses something liketest_%05d.jpgwith the numbered sequence having preceding zeroes with five digits; if you don't have it in that format you might need to use a globbing pattern.
This always works well for me:
ffmpeg -i yourfile.mp4 -r 1 -ss 15 -t 16 -f image2 snapshot.jpg
^ ^
^ ^
start end
time time
yourfile.mp4: movie clipsnapshot.jpg: new image file- IMPORTANT: leave
image2alone, as it was the only way to get what I wanted
Time is in seconds only; If it's 2 minutes ahead of the reel, then it's 120.
One image file is always one-second worth, thus calculate your desired image by that approach.
Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.
