id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
1717,Concat filter can not join individual images,chinshou,,"using latest ffmepg build from http://ffmpeg.zeranoe.com/builds/win32/static/ffmpeg-20120903-git-5d55830-win32-static.7z

execute following command 
ffmpeg -i a1.jpg -i a2.jpg -i a3.jpg -filter_complex ""[0:0] [1:0] [2:0] concat=n=3:v=1:a=0"" join.mp4 

to join three jpeg files to one video, But the generated mp4 file only contain two frames.

ffmpeg -i join.mp4 test%d.jpg

only output test1.jpg and test2.jpg

best regards",defect,open,minor,avfilter,git-master,,,,,,1,1