mp4 Atoms

AtomicParsley before.mp4 -T
Atom ftyp
Atom moov
Atom free
Atom mdat

ffmpeg -i before.mp4 -c:a copy -c:v copy after.mp4

AtomicParsley after.mp4 -T
Atom ftyp
Atom free
Atom mdat
Atom moov

ffmpeg -i before.mp4 -movflags faststart -c:a copy -c:v copy after2.mp4

AtomicParsley after2.mp4 -T
Atom ftyp 
Atom moov 
Atom free 
Atom mdat 
^ Same as first one

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 1 h 45 min
Bit rate                                 : 900 kb/s
Width                                    : 1 280 pixels
Height                                   : 534 pixels
Display aspect ratio                     : 2.40:1
Original display aspect ratio            : 2.40:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.055
Stream size                              : 676 MiB (88%)
Writing library                          : x264 core 152
Encoding settings                        : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=900 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=31250 / vbv_bufsize=31250 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00