Handlers
code | description | type | specification |
|---|---|---|---|
3gsd | 3GPP Scene Description | handler | 3GPP |
auxv | Auxiliary video | handler | ISO |
avmd | Avid Metadata | handler | Avid |
clcp | Closed Caption | handler | Apple |
cpad | CPCM Auxiliary Metadata | handler | DVB |
crsm | ClockReferenceStream | handler | MPEG-4 |
dmbd | DVB Mandatory Metadata | handler | DVB |
dtva | TV-Anytime Metadata, according to DVB specifications | handler | DVB |
dvmd | withdrawn, unused, do not use (was Dolby Vision Metadata) | handler | Deprecated |
fdsm | Font | handler | MPEG-4 |
gesm | General MPEG-4 systems streams (without specific handler) | handler | see (1) below |
GRAP | Subtitle Graphics | handler | Sony |
hint | Hint | handler | ISO |
hpix | Hipix Rich Picture Format | handler | Hipix |
ID32 | ID3 version 2 meta-data handler (meta box) | handler | id3v2 |
ipdc | DVB IPDC ESG Metadata | handler | DVB |
ipsm | IPMP Stream | handler | MPEG-4 |
m7sm | MPEG7Stream | handler | MPEG-4 |
meta | Metadata | handler | ISO |
mjsm | MPEG-J Stream | handler | MPEG-4 |
mp21 | MPEG-21 Digital item | handler | MPEG-21 |
mp7b | MPEG-7 (binary meta-data) | handler | ISO |
mp7t | MPEG-7 (textual meta-data) | handler | ISO |
mpd$20 | MPD contained in a metabox | handler | 3GPP |
mpdl | MPD link contained in a metabox | handler | 3GPP |
MPEG | QuickTime MPEG track handler | handler | Apple |
musi | QuickTime Music track handler | handler | Apple |
nrtm | Non-Real Time Metadata (XAVC Format) | handler | Sony |
null | No handling required (meta-data) | handler | ISO |
ocsm | ObjectContentInfoStream | handler | MPEG-4 |
odsm | ObjectDescriptorStream | handler | MPEG-4 |
pict | Image Item and Image sequences | handler | HEIF |
qd3d | QuickTime QuickDraw 3D ttrack handler | handler | Apple |
sbtl | QuickTime Subtitle track handler | handler | Apple |
sdsm | SceneDescriptionStream | handler | MPEG-4 |
skmm | Key Management Messages | handler | DVB |
smhr | Samsung Video Metadata Handler | handler | Samsung |
soun | Audio | handler | ISO |
sprt | QuickTime Sprite track handler | handler | Apple |
strm | QuickTime Streaming track handler | handler | Apple |
subt | Subtitles | handler | ISO |
text | Text | handler | 3GPP |
tmcd | Timecode | handler | Apple |
twen | QuickTime Tween track handler | handler | Apple |
uri$20 | URI identified metadata | handler | DVB |
vide | Video | handler | ISO |
volv | Volumetric visual media | handler | ISO |
hapt | Haptics | handler | ISO |
- There only exists a defined set of handler code-points in MP4 file format allowing declaration of most known MPEG-4 Systems streams. However there is no provision for private MPEG-4 streams, which may be used by the file creator. This will likely push the file creator into using one of the defined handler types, which is wrong and may corrupt processing by some file readers. This is a generic handler type to indicate that the media is an MPEG-4 systems stream, without further details on the stream type itself. The associated sample descriptions must still remain the same, i.e. "mp4s" as used with all MPEG-4 systems streams.