11 [ "$video_size" != "" ] && video_size
="-s "$video_size
13 if [ "$video_type" == "v4l" ]
14 then ffmpeg
-vd
"$video_file" -r
$video_fps $video_size -f imagepipe
-f yuv4mpegpipe
-
15 else ffmpeg
-i
"$video_file" -ss
$video_position -f imagepipe
-r
$video_fps $video_size -f yuv4mpegpipe
-