[FFmpeg-user] FFMPEG processing time

[Paul B Mahol]

On 8/23/13, Dzung Nguyen <dzungng89 at gmail.com> wrote:
> I have the following script, I have run it for a day but still doesn't
> finish. The goal is a one hour video
>
> 1) Images --> videos:
>
> ffmpeg -loop 1 -r 1 image.png -r 29.97 video1.mpg

This will never finish.

>
> 2) Concatenate allsubvideos:
>
> cat *.mpg >concat.mpg
>
> 3) Overlay with another video:
>
> ffmpeg -i concat.mpg -i input2.webm"\
>                                     " -filter_complex
> \"color=c=black:size=1280x720 [base];"\
>                                     " [0:v] setpts=PTS-STARTPTS,
> scale=#{size_slide} [left];"\
>                                     " [1:v] setpts=PTS-STARTPTS,
> scale=#{size_webcam} [right];"\
>                                     " [base][left]
> overlay=shortest=1:x=0:y=39[tmp1];"\
>                                     " [tmp1][right]
> overlay=shortest=1:x=856:y=402\" -q:v 0 overlay.mpg")
>
> This seems unable to finish even if I let it run for a day. What settings
> should I change?
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