Hot answers tagged ffmpeg
Couldn't wait! Figured it out: I saved an image to the file out.png at a fixed frame rate from processing. Created a fifo: mkfifo fifo Then in one terminal: tail -f out.png > fifo Then in another terminal: cat fifo | ffmpeg -f image2pipe -r 1 -i pipe:0 spo.mp4 Making sure to close tail first allowing ffmpeg to write the last bit of the file.
The -loop option is specific to the image file demuxer and gif muxer, so it can't be used for typical video files, but you can use the concat demuxer. Concat demuxer Make a text file. Contents of an example text file to repeat 4 times. $ cat list.txt file 'input.mp4' file 'input.mp4' file 'input.mp4' file 'input.mp4' Then run ffmpeg: ffmpeg -f concat ...
There are two frame rates to consider: the input and the output. By default the input frame rate is 25, and the output will use the same frame rate as the input unless you tell it otherwise. Same frame rate for input and output If you want to input and output to have the same frame rate, then just provide the input frame rate. This example will set a ...
I'm using the below code to do the same thing. ffmpeg -framerate 30 -i img%03d.png -c:v libx264 -pix_fmt yuv420p -crf 23 output.mp4 This reads the input at 30 fps (the -framerate 30 option) and encodes it using the libx264 codec with constant rate factor of 23 (the -crf 23 option).
You could possibly use the curves filter. It has a lighter preset: ffmpeg -i input -vf curves=preset=lighter -c:a copy output The red, green, and blue components can be adjusted separately. The following is the same as what the lighter preset uses: curves=r='0.4/0.5':g='0.4/0.5':b='0.4/0.5' Additionally you can make your own curves preset in ...
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