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I have used this command to concate multiple images with transition effects to create video.

"-y -f concat -safe 0 -i <txt file path> -filter_complex [0:0][1:0]concat=n=2:v=0:a=1[out] -map [v] -shortest -vf fps=40 -pix_fmt yuv420p <video path>"

But it is showing error : 

Stream specifier ':0' in filtergraph description [0:0][1:0]concat=n=2:v=0:a=1[out] matches no streams.

Here is my txt file 

file '/storage/emulated/0/image1.jpg'
duration 5
file '/storage/emulated/0/image2.jpg'
duration 5
file '/storage/emulated/0/image3.jpg'

However if i am not applying any filter effect, it is successfully creating a video.

Ravi
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1 Answers1

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Following command creates the video at a frame rate of 1 frame for 5 seconds.

ffmpeg -y -r 1/5 -i image1.jpg -i image2.jpg -i image3.jpg -filter_complex 'concat=n=3:v=1:a=0 [out]' -map [out] -c:v libx264  output.mp4
arunk2
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  • I have replaced image1.jpg with my image path and output.mp4 to my mp4 file path but it gives `[NULL @ 0xb8e646c0] Unable to find a suitable output format for '[out]'` – Ravi Apr 26 '17 at 12:07
  • Not sure what is happening. What s ur ffmpeg version? Can you paste ffmpeg output for more details. – arunk2 Apr 26 '17 at 12:43