I am trying to make an app in which users can send a video and it will be concatenated with other videos automatically. So the videos are in random formats, but I am converting them before concatenation using this command :
ffmpeg -y -i {orginalVideo.itsExtention} -vcodec wmv2 4.wmv
For the concatenation I have the following command:
ffmpeg -y -i concat.wmv -i 4.wmv -filter_complex "[0:0][0:1][1:0][1:1] concat=n=2:v=1:a=1" output.wmv
but I get the following error
Input link in1:v0 parameters (size 640x480, SAR 1:1) do not match the corresponding output link in0:v0 parameters (1080x1920, SAR 1:1)
Failed to configure output pad on Parsed_concat_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #1:0
Thank you for your answer
The videos have to be the same size (pixel dimensions, that is). The output stream can't change sizes midway through. So resize one (or both) to the desired size.
e.g.:
ffmpeg -y -i {orginalVideo.itsExtention} -vf scale=640:480 -vcodec wmv2 4.wmv
And see https://trac.ffmpeg.org/wiki/Scaling for more.