MP4 moov header debug

bisect.txt

ffmpeg -i original.mp4 -acodec copy -vcodec copy -t 5 -y foo.mp4

Looking for moov < 6000, ordered by commit timestamp

1319406693 42d44ec306d0656ace5cea63867f70fa686141cb MOOV:5391 GOOD commit. Took 607 seconds
1321426103 4da45aff28de618c3be566094952bc19da9c9118 MOOV:5391 GOOD commit. Took 622 seconds
1322096901 8e576d58306df95d6373dd0ca2c1f21f1afaeca9 MOOV:5391 GOOD commit. Took 623 seconds
1322489268 ae5873f13bc7d0b4e93193ff7e90c92f52742268 MOOV:5391 GOOD commit. Took 627 seconds
1322498439 2027d073ae0bb938f1756770d4d9e310d165bdd8 MOOV:5391 GOOD commit. Took 628 seconds
1322522429 4dcd1a3145dd93602b86a44ebc07d98ca2a30ab6 MOOV:5391 GOOD commit. Took 624 seconds
1322535802 fc09bf57a60d4c4a6d339b204b3282337067c06d MOOV:6695 BAD commit. Took 625 seconds
1322578296 6ffdc262b0d821e0dda6c83b1593256c06424625 MOOV:6695 BAD commit. Took 628 seconds
1322585425 b0a90c20041b1fc8e5cd2671c6ca59ec4b1a60df MOOV:6967 BAD commit. Took 625 seconds
1322675186 8f025f2f6055cf534d3276b4aef491a912336cd2 MOOV:6691 BAD commit. Took 624 seconds
1322687454 77e0c7584b595edcec7bf393c0e77dbcfe2a8cb4 MOOV:5351 GOOD commit. Took 568 seconds
1322783471 7b0b10ce4186eaa1cd3c0a2bfbb86307d65eecfd MOOV:6691 BAD commit. Took 627 seconds

box-sizes.rb

#!/usr/bin/env ruby
#
# Hacky script to get the outline of boxdumper's output
#

def parse_line(data)
  md = /^( *)/.match(data)
  data = data.lstrip

  node = {}
  node[:level] = md[1].size / 2

  case data
  when /([^=]+) = (.+)/
    node[:type] = :pair
    node[:key] = $1
    node[:value] = $2
  when /^\[([^\]:]+)(?::([^\]]+))?\]$/
    node[:type] = :category
    node[:name] = $1
    node[:desc] = $2
  else
    node[:type] = :other
    node[:value] = data
  end

  node
end

def parse(data)
  data.lines.map do |line|
    parse_line(line)
  end
end

if __FILE__ == $0
  require 'pp'
  data = File.open(ARGV[0] || 'mp4box.box', 'rb').read
  lines = parse(data)

  lines.each do |line|
    if line[:type] == :category
      $stdout.write (" " * line[:level]) + line[:name]
    elsif line[:type] == :pair && line[:key] == "size"
      $stdout.puts ' ' + line[:value]
    end
  end
end

ffmpeg.box-sizes

ROOT 1720029
  ftyp 32
  free 8
  mdat 1712180
  moov 7809
    mvhd 108
    trak 3487
      tkhd 92
      edts 36
        elst 28
      mdia 3351
        mdhd 32
        hdlr 45
        minf 3266
          vmhd 20
          dinf 36
            dref 28
              url  12
          stbl 3202
            stsd 150
              avc1 134
                avcC 48
            stts 24
            stss 48
            ctts 1448
            stsc 40
            stsz 748
            stco 736
    trak 4108
      tkhd 92
      edts 36
        elst 28
      mdia 3972
        mdhd 32
        hdlr 45
        minf 3887
          smhd 16
          dinf 36
            dref 28
              url  12
          stbl 3827
            stsd 103
              mp4a 87
                esds 51
            stts 24
            stsc 1900
            stsz 1056
            stco 736
    udta 98
      meta 90
        hdlr 33
        ilst 45
          ©too 37
            data 29

mp4box.box-sizes

ROOT 1716984
  ftyp 32
  moov 4709
    mvhd 108
    trak 2915
      tkhd 92
      edts 36
        elst 28
      mdia 2779
        mdhd 32
        hdlr 45
        minf 2694
          vmhd 20
          dinf 36
            dref 28
              url  12
          stbl 2630
            stsd 150
              avc1 134
                avcC 48
            stts 24
            ctts 1448
            stss 48
            stsc 136
            stsz 748
            stco 68
    trak 1580
      tkhd 92
      edts 36
        elst 28
      mdia 1444
        mdhd 32
        hdlr 45
        minf 1359
          smhd 16
          dinf 36
            dref 28
              url  12
          stbl 1299
            stsd 91
              mp4a 75
                esds 39
            stts 24
            stsc 52
            stsz 1056
            stco 68
    udta 98
      meta 90
        hdlr 33
        ilst 45
          ©too 37
            data 29
  mdat 1712180
  free 8
  free 55

NOTES.txt

Debug notes:

# On HEAD ( f821f98126595002c8cb7a5f17521908d746dc8a )

wget http://ffmpeg-debug.s3.amazonaws.com/1050-moov-header-size/moov-header-sample.mp4
ffmpeg -i moov-header-sample.mp4 -acodec copy -vcodec copy -y ffmpeg.mp4
MP4Box -inter 500 -out mp4box.mp4 ffmpeg.mp4

qt-faststart ffmpeg.mp4 /dev/null | grep 'moov  '
# moov    1712220 7809
qt-faststart mp4box.mp4 /dev/null | grep 'moov  '
# moov         32 4709

boxdumper ffmpeg.mp4 > ffmpeg.box
ruby box-sizes.rb ffmpeg.box > ffmpeg.box-sizes
boxdumper mp4box.mp4 > mp4box.box
ruby box-sizes.rb mp4box.box > mp4box.box-sizes