Musher is a collection of ffmpeg commands that I in trying to prepare the ffmpeg commands for spaceRAID. Hopefully someone will find this half useful, though it is really just badly commented bits of code. Feel free to use.

musher

#!/bin/bash
#
# Website Links Useful
# https://stackoverflow.com/questions/7362130/getting-video-dimension-from-ffmpeg-i
# https://trac.ffmpeg.org/wiki/Encode/H.264
# https://superuser.com/questions/483232/make-exact-mp4-h264-format-for-uploading-to-youtube
# https://github.com/yihui/animation/issues/74
# https://askubuntu.com/questions/110264/how-to-find-frames-per-second-of-any-video-file
# https://stackoverflow.com/questions/14306205/do-ffmpeg-h264-compression-presets-affect-the-video-quality
# http://www.bugcodemaster.com/article/get-information-video-file-using-ffmpeg
# https://superuser.com/questions/326629/how-can-i-make-ffmpeg-be-quieter-less-verbose
# https://video.stackexchange.com/questions/16356/how-to-use-ffprobe-to-obtain-certain-information-about-mp4-h-264-files
# /usr/local/Cellar/ffmpeg/3.4.1/bin/ffmpeg -i test_output2.mp4 -i "Greater DC Event 2017 Practice 3 of 78 sponsored by Accenture CHS District.mp4" -filter_complex "[0]drawtext=enable=between(t\,3\,9):fontcolor=white:fontfile=/Library/Fonts/Trebuchet MS.ttf:fontsize=36:text=Hello:x=text_w/16:y=(h-text_h)/2[s0];[s0]scale=512:288:force_original_aspect_ratio=1[s1];[s1]pad=512:288:(ow-iw)/2:(oh-ih)/2[s2];[s2][1]concat=n=2[s3]" -map [s3] mushed.mp4 -y
# import ffmpeg
# infile1 = ffmpeg.input("test_output2.mp4")
# infile2 = ffmpeg.input("Greater DC Event 2017 Practice 3 of 78 sponsored by Accenture CHS District.mp4")
# text = "Hello"
# x=(ffmpeg
#     .concat(
#         infile1.drawtext(text = text,
#                       fontfile="/Library/Fonts/Trebuchet MS.ttf",
#                       fontsize = 36,
#                       fontcolor = "white",
#                       x = "text_w/16",
#                       y = "(h-text_h)/2",
#                       enable = "between(t,3,9)")
#             .filter_("scale", "512:288", force_original_aspect_ratio = 1)
#             .filter_("pad", "512:288:(ow-iw)/2:(oh-ih)/2"),
#         infile2)
#         .output("mushed.mp4")
# )


# -preset medium
# intermediate1.mp4 bit_rate=200949
# intermediate2.mp4 bit_rate=237883
# mushed.mp4 bit_rate=234788
# user 2m48.646s
# sys 0m3.211s

# -preset fast
# intermediate1.mp4 bit_rate=202338
# intermediate2.mp4 bit_rate=235118
# mushed.mp4 bit_rate=235870
# user 2m18.231s
# sys 0m2.900s

# -preset superfast
# intermediate1.mp4 bit_rate=383901
# intermediate2.mp4 bit_rate=451244
# mushed.mp4 bit_rate=437028
# user 1m5.189s
# sys 0m2.048s

# -preset ultrafast
# intermediate1.mp4 bit_rate=718129
# intermediate2.mp4 bit_rate=793732
# mushed.mp4 bit_rate=795494
# user 0m47.797s
# sys 0m1.684s


#ffprobe -v error -show_entries stream=width,height -of default=noprint_wrappers=1 "$2"
#ffprobe -v error -select_streams 0 -show_entries stream=r_frame_rate -of csv=p=0 "$1"
#ffprobe -v error -select_streams 0 -show_entries stream=r_frame_rate,bit_rate -of default=noprint_wrappers=1 "$1"
#ffprobe -v error -select_streams 0 -show_entries stream=width,height,r_frame_rate,bit_rate -of default=noprint_wrappers=1 "$2"

#Change the size and shape of the intro.
ffmpeg -v error -y -i "$1" -vf "drawtext=fontfile=/Library/Fonts/Trebuchet MS.ttf:text=$1: enable='between(t,3,9)':fontcolor=white:fontsize=36:x=text_w/16:y=(h-text_h)/2,scale=512:288:force_original_aspect_ratio=1,pad=512:288:(ow-iw)/2:(oh-ih)/2" -c:v libx264 -preset ultrafast -r 30000/1001 -crf 18 -c:a libmp3lame -b:a 320k intermediate1.mp4
echo intermediate1.mp4 `ffprobe -v error -select_streams 0 -show_entries stream=bit_rate -of default=noprint_wrappers=1 intermediate1.mp4`

#Change codec of the other video, maybe can be skipped.
ffmpeg -v error -y -i "$2" -c:v libx264 -preset ultrafast -crf 18 -c:a libmp3lame -b:a 320k intermediate2.mp4
echo intermediate2.mp4 `ffprobe -v error -select_streams 0 -show_entries stream=bit_rate -of default=noprint_wrappers=1 intermediate2.mp4`

# Combine the two.
ffmpeg -v error -y -i intermediate1.mp4 -i intermediate2.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -r 30000/1001 -c:v libx264 -preset ultrafast -crf 18 -c:a libmp3lame -b:a 320k mushed.mp4
echo mushed.mp4 `ffprobe -v error -select_streams 0 -show_entries stream=bit_rate -of default=noprint_wrappers=1 mushed.mp4`

# -preset veryfast ultrafast
# -preset ultrafast

# FINAL
/usr/local/Cellar/ffmpeg/3.4.1/bin/ffmpeg -i test_output2.mp4 -i "Greater DC Event 2017 Practice 3 of 78 sponsored by Accenture CHS District.mp4" -filter_complex "[0]drawtext=enable=between(t\,3\,9):fontcolor=white:fontfile=/Library/Fonts/Trebuchet MS.ttf:fontsize=36:text=Hello:x=text_w/16:y=(h-text_h)/2[s0];[s0]scale=512:288:force_original_aspect_ratio=1[s1];[s1]pad=512:288:(ow-iw)/2:(oh-ih)/2[s2];[s2][1]concat=n=2:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -r 30000/1001 -preset ultrafast mushed.mp4 -y

musher2

#!/bin/bash
# Input test_output2.mp4 "Greater DC Event 2017 Practice 3 of 78 sponsored by Accenture CHS District.mp4"
/usr/local/Cellar/ffmpeg/3.4.1/bin/ffmpeg -y -i "$1" -i "$2" -filter_complex "\
  [0:v]drawtext=enable=between(t\,3\,9):
    fontcolor=white:fontfile=/Library/Fonts/Trebuchet MS.ttf:
    fontsize=36:text=Greater DC Event 2017
Practice 3 of 78 sponsored
by Accenture CHS District:
    x=text_w/16:
    y=(h-text_h)/2[v1];
    [0:a][1:a]concat=n=2:v=0:a=1[outa];
    [v1]scale=512:288:force_original_aspect_ratio=1[v2];
    [v2]pad=512:288:(ow-iw)/2:(oh-ih)/2[v3];
    [v3][1:v]concat=n=2[outv]
    " -map "[outv]" -map "[outa]" -r 30000/1001 -preset ultrafast mushed2.mp4
#    [0:a]afifo[a1];\
#    [s0]scale=512:288:force_original_aspect_ratio=1[s1];\

#    [s1]pad=512:288:(ow-iw)/2:(oh-ih)/2[s2];\
#    [s1][1]concat=n=2[s3]\
# ffmpeg -i "$1" -i "$2" -filter_complex "\
#   [0]drawtext=enable=between(t\,3\,9):\
#   fontcolor=white:\
#   fontfile=/Library/Fonts/Trebuchet MS.ttf:\
#   fontsize=36:\
#   text=Hello:\
#   x=text_w/16:\
#   y=(h-text_h)/2[s0];\
#   [s0]scale=512:288:\
#   force_original_aspect_ratio=1[s1];\
#   [s1]pad=512:288:(ow-iw)/2:\
#   (oh-ih)/2[s2];\
#   [s2][1]concat=n=2:\
#   v=1:\
#   a=1[outv][outa]" -map "[outv]" -map "[outa]" -r 30000/1001 -preset ultrafast mushed.mp4 -y

musher3

#!/bin/bash
# time ./musher3 ../Video\ Intro.mov Saturday\ 3-11-17_ND/Qualification\ 37\ of\ 78.mp4
# test_output2.mp4 "Greater DC Event 2017 Practice 3 of 78 sponsored by Accenture CHS District.mp4"
/usr/local/Cellar/ffmpeg/3.4.1/bin/ffmpeg -y -nostdin -nostats -i "$1" -i "$2" -filter_complex "\
  [0:v]drawtext=enable=between(t\,3\,9):
    fontcolor=white:fontfile=/Library/Fonts/Trebuchet MS.ttf:
    fontsize=36:text='Greater DC Event 2017
Practice 3 of 78 sponsored
by Accenture CHS District':x=text_w/16:y=(h-text_h)/2[i1];
    [0:a][1:a]concat=n=2:v=0:a=1[outa];
    [i1][1:v]scale2ref[i2][v2];
    [i2][v2]concat=n=2[outv]
    " -map "[outv]" -map "[outa]" -r 30000/1001 -preset ultrafast mushed3.mp4