concat demuxer AVOptions:
  -safe              <boolean>    .D....... enable safe mode (default true)
  -auto_convert      <boolean>    .D....... automatically convert bitstream 
format (default true)
  -segment_time_metadata <boolean>    .D....... output file segment start time 
and duration as packet metadata (default false)

concat demuxer has no framerate param, delete "-framerate 1/2" and run your 
command again.

On 7/10/2021 10:16 AM, Mark Dougherty wrote:
ffmpeg -framerate 1/2 -f concat -safe 0 -i "Test-ffmpeg.Txt" -filter_complex 
"scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:-1:-1:color=black,format=yuv420p"
 -r 30 -movflags +faststart output.mp4

I tried creating an input file list using this syntax: -f concat -safe 0 -i 
"Test-ffmpeg.Txt" but when I run the command, I get a "Option framerate not 
found" fatal error

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