[FFmpeg-user] streams

[Lou]

On Wed, 24 Dec 2014 15:11:53 +0200
Vladimir Bilichenko <belikwolf at gmail.com> wrote:

> Do you have any ideas how I can solve my problem?

You have to add an audio source. Otherwise where would the audio come
from? One method:

"aevalsrc=0|0:d=18.2[a0];[0:v][a0][1:v][1:a][2:v][2:a]concat=n=3:v=1:a=1"

See http://ffmpeg.org/ffmpeg-filters.html#aevalsrc

You may need to scale, pad, and/or crop the video from the first input
before feeding it to concat.