How to generate a 2hour-long blank video

Question

I\'d like to generate a video with a black or white background (or even nothing at all) that lasts for a specific duration (e.g. 2 hour long).

Can you please suggest a f

Answer 1

For an h264 output in a MP4 container, use:

ffmpeg -t 7200 -f lavfi -i color=c=black:s=640x480 -c:v libx264 -tune stillimage -pix_fmt yuv420p output.mp4

If you want to include an audio track, simply add the arguments for the audio input and encoding (if necessary). The output's duration will be determined by the shortest input, i.e. the audio. For example:

ffmpeg -f lavfi -i color=c=black:s=640x480 -i audio.ogg -c:v libx264 -tune stillimage -pix_fmt yuv420p -shortest -c:a aac -b:a 128k output-with-audio.mp4