title: Invalid data found when processing input | ffmpeg
body: <p>I'm trying to concat multiple videos with ffmpeg, im using a text file as input but im getting &quot;Files.txt: Invalid data found when processing input&quot;.</p>
  <p>My command:</p>
  <pre><code>ffmpeg -i Files.txt -filter_complex &quot;[0:v]fps=25,format=yuv420p,setpts=PTS-STARTPTS[v0];[0:a]aformat=sample_rates=44100:channel_layouts=stereo,asetpts=PTS-STARTPTS[a0];[1:v]fps=25,format=yuv420p,setpts=PTS-STARTPTS[v1];[1:a]aformat=sample_rates=44100:channel_layouts=stereo,asetpts=PTS-STARTPTS[a1];[v0][a0][v1][a1]concat=n=2:v=1:a=1&quot; -movflags +faststart output.mp4
  </code></pre>
  <p>My text file:</p>
  <pre><code>file '1.mp4'
  file '2.mp4'
  </code></pre>