MP4

• MP4Box is part of gpac

• fragmented MP4 aka fMP4: media - What exactly is Fragmented mp4(fMP4)? How is it different from normal mp4? - Stack Overflow

Fast start

To speed up loading or streaming, metadata should be at the begining:

1. 'moov' info atom

2. 'mdat' data atom

Encoder usally output:

1. 'mdat' data atom

2. 'moov' info atom

To fix that:

ffmpeg -i input.mp4 -codec copy -map 0 -movflags +faststart output.mp4
qt-faststart input.mp4 output.mp4

• Encode/H.264 – FFmpeg

• Tools to fix MP4 videos so players can start playback instantly (without downloading the whole file) | monline

• AtomicParsley

• Understanding the MPEG-4 movie atom | Adobe Developer Connection

• Python version https://github.com/danielgtaylor/qtfaststart

• https://github.com/FFmpeg/FFmpeg/blob/master/tools/qt-faststart.c

• Google Code Archive - Long-term storage for Google Code Project Hosting. see also issues https://code.google.com/archive/p/moovrelocator/issues

• Improving qt-faststart | Breaking Eggs And Making Omelettes

• QTIndexSwapper - Renaun Erickson | Renaun Erickson

• QTIndexSwapper 2 - Renaun Erickson | Renaun Erickson