Merge multiple video files using ffmpeg by adding multiple compress options I would like to merge multiple video files, performing in the same time complex compressing options. 

How can I do that? The following ffmpeg command resulting this error: 

 Filtergraph 'scale=1280:720,setpts=0.20*PTS' was specified through the -vf/-af/-filter option for output stream 0:0, which is fed from a complex filtergraph.
-vf/-af/-filter and -filter_complex cannot be used together for the same stream.


The ffmpeg command that i used: 

ffmpeg -i GOPR0003.MP4 -i GOPR0004.MP4 -i GOPR0005.MP4 -i GOPR0005.MP4 -i GOPR0006.MP4 -i GOPR0007.MP4 -i GOPR0007.MP4 -i GOPR0008.MP4 -i GOPR0009.MP4 -i GOPR0010.MP4 -i GOPR0012.MP4 -i GOPR0013.MP4 -i GOPR0015.MP4 \
   -filter_complex "[0:v] [1:v] [2:v] [3:v] [4:v] [5:v] [6:v] [7:v] [8:v]  [9:v]  [10:v] concat=n=11:v=1 [v]" \
    -r 24 -crf 18  -vcodec libx264 -vb 20M -vf "scale=1280:720,setpts=0.20*PTS"  -an   -map "[v]"   video_output_01.avi
All filtering should be performed in the same filtergraph. Each -filter_complex or -vf defines a different filtergraph. You can use

-filter_complex "[0:v] [1:v] [2:v] [3:v] [4:v] [5:v] [6:v] [7:v] [8:v]  [9:v]  [10:v] concat=n=11:v=1,scale=1280:720,setpts=0.20*PTS [v]"