This will play two input videos side by side while also applying the temporal difference filter to them
-
ffmpeg -i input01 -i input02 -filter_complex "[0:v:0]tblend=all_mode=difference128[a];[1:v:0]tblend=all_mode=difference128[b];[a][b]hstack[out]" -map [out] -f nut -c:v rawvideo - | ffplay -
-
+
ffmpeg -i input01 -i input02 -filter_complex "[0:v:0]tblend=all_mode=difference128[a];[1:v:0]tblend=all_mode=difference128[b];[a][b]hstack[out]" -map [out] -f nut -c:v rawvideo - | ffplay -
- ffmpeg
- starts the command
- -i input01 -i input02
- Designates the files to use for inputs one and two respectively
- - -filter_complex
- Lets FFmpeg know we will be using a complex filter (this must be used for multiple inputs)
+ - -filter_complex
- Lets ffmpeg know we will be using a complex filter (this must be used for multiple inputs)
- [0:v:0]tblend=all_mode=difference128[a]
- Applies the tblend filter (with the settings all_mode and difference128) to the first video stream from the first input and assigns the result to the output [a]
- [1:v:0]tblend=all_mode=difference128[a]
- Applies the tblend filter (with the settings all_mode and difference128) to the first video stream from the second input and assigns the result to the output [b]
- [a][b]hstack[out]
- Takes the outputs from the previous steps ([a] and [b] and uses the hstack (horizontal stack) filter on them to create the side by side output. This output is then named [out])
- -map [out]
- Maps the output of the filter chain
- -f nut
- Sets the format for the output video stream to Nut
- -c:v rawvideo
- Sets the video codec of the output video stream to raw video
- - -
- Tells FFmpeg that the output will be piped to a new command (as opposed to a file)
+ - -
- Tells ffmpeg that the output will be piped to a new command (as opposed to a file)
- |
- Tells the system you will be piping the output of the previous command into a new command
- - ffplay -
- Starts FFplay and tells it to use the pipe from the previous command as its input
+ - ffplay -
- Starts ffplay and tells it to use the pipe from the previous command as its input
Example of filter output