NAME¶
MP4Box - MPEG-4 Systems Toolbox
SYNOPSIS¶
MP4Box [options]
file [options]
DESCRIPTION¶
MP4Box is a multi-purpose command line tool to create and edit MPEG-4 Systems
presentations and manipulate ISO-media files (MP4, 3GP, MOV).
MP4Box supports file conversion from various raw formats and
IsoMedia/AVI/MPEG-PS/OGG containers, file hinting for RTP streaming for
QuickTime compatible streaming servers, file interleaving, file fragmentation
and track extraction.
MP4Box also provides dump tools used to inspect file layout, RTP hint tracks,
SDP information, scene composition. It may also be used to convert to and from
BT/XMT-A/VRML/X3D.
MP4Box also features MPEG-4 Systems encoders and decoders for BIFS and OD tools.
MP4Box doesn't expect any particular order in options at prompt.
GETTING HELP WITH MP4Box¶
- -h [type]
- prints help screen. "type" can be one of
"general", "hint", "import",
"encode", "extract", "dump",
"swf", "meta", "crypt", "format",
"rtp", "live" for specific help.
- -version
- prints version of MP4Box.
- -noprog
- disable progress reports.
- -quiet
- quiet mode (no log info).
- -v
- verbose mode (more log info).
- -strict-error
- exits after the first error is reported.
- -nodes
- lists supported MPEG-4 Systems nodes in MP4Box current
build.
- -node NodeName
- prints the node syntax. Each field is listed as
eventType fieldType fieldName defaultValue
and field quantization information and quantization bounds if any.
- -xnodes
- lists supported X3D nodes in MP4Box current build.
- -xnode NodeName
- prints the X3D node syntax. Each field is listed as
- -snodes
- lists supported SVG/LASeR nodes in MP4Box current
build.
GENERAL OPTIONS¶
- -inter duration
- interleaves media data in chunks of the maximum specified
duration (expressed in milliseconds) and prepare file for HTTP/FTP
streaming. By default MP4Box always stores with 0.5 second interleaving.
An interleaving value of '0' stores without interleaving (meta-data then
track after track).
-old-inter duration same as -inter but without drift adjustment
NOTE: Track Edit Lists are ignored when performing interleaving.
- -flat
- stores file with all media data first, non interleaved. If
used when creating a new file, no temporary file is created (faster
storage).
- -frag duration
- fragments file using ISO-Media movie fragments. Tracks will
be fragmented so that no track run exceeds the specified duration
(expressed in milliseconds). Disables interleaving.
- -out <filename>
- specifies output file name.
- -tmp <dirname>
- specifies driectory for temporary storage. If not set,
temporary storage is OS-dependent.
- -ffspace size
- inserts free space before moof in fragmented files.
- -nosys
- removes all MPEG-4 Systems information from the file but
keeps an empty IOD for MPEG-4 Profile@Level indications. alias:
-no-sys
- -no-iod
- removes InitialObjectDescriptor from file.
- -isma
- rewrites the file as an ISMA 1.0 Audio/Video file (all
systems info rewritten) with proper clock references.
- -ismax
- rewrites the file as an ISMA 1.0 Audio/Video file (all
systems info rewritten) with ISMA clock references (streams not explicetly
synchronized).
NOTE: Seeking may be broken with some players (in ISMA, audio and video
streams do not depend on main scene clock).
- -3gp
- rewrites the file as a 3GP file (no more MPEG-4 Systems
specific info). This option is turned on by default when input file
extension is .3gp or .3g2.
- -ipod
- rewrites the file for iPod.
- -brand ABCD[:v]
- sets major brand of file, with optional version.
- -ab ABCD
- adds given brand to file's alternate brand list.
- -rb ABCD
- removes given brand to file's alternate brand list.
- -cprt string
- adds string copyright notice to file.
- -chap chap_file
- adds chapter information contained in chap_file to movie.
For more details on chapter file syntax, cf
http://gpac.sourceforge.net/auth_mp4box.php.
- -rem trackID
- removes given track from file - can be specified multiple
times.
- -enable trackID
- enables given track.
- -disable trackID
- disables given track.
- -new
- forces creation of a new destination file.
- -lang [tkID=]LAN
- sets the language of all tracks or the given track. LAN is
the ISO 639-2 3 character code.
- -delay [tkID=]delay_ms
- sets the delay in milliseconds of all tracks or the given
track. LAN is the ISO 639-2 3 character code.
- -par tkID=PAR
- sets visual track pixel aspect ratio (PAR=Num:Den or
"none").
- -name tkID=name
- sets track handler name.
- -itags tag1[:tag2]
- sets iTunes tags to file - more info: MP4Box
-tag-list.
- -split time_in_seconds
- splits in files of desired maximum duration. This will
remove all MPEG-4 Systems media.
- -split-size size_in_kilobytes
- splits in files of desired maximum size. This will remove
all MPEG-4 Systems media. Alias: -splits
- -split-chunk start:end
- extracts a new file from specified start to end times (in
seconds). This will remove all MPEG-4 Systems media. Alias: -splitx
- -splitz start:end
- same as -split-chunk option, but adjust end time to be
juste before the last rap found in the chunk.
- -split-rap start:end
- splits in files begining at each RAP. This will remove all
MPEG-4 Systems media. Alias: -splitr
- -group-add fmt
- creates a new grouping information in the file. Format is a
colon-separated list of following options:
refTrack=ID: ID of the track used as a group reference. If not set, the
track will belong to the same group as the previous trackID specified. If
0 or no previous track specified, a new alternate group will be created.
switchID=ID: ID of the switch group to create. If 0, a new ID will be
computed for you. If <0, disables SwitchGroup.
criteria=string: list of space-separated 4CCs.
trackID=ID: ID of the track to add to this group.
*WARNING* Options modify state as they are parsed:
trackID=1:criteria=lang:trackID=2 is different from:
criteria=lang:trackID=1:trackID=2. -group-rem-track ID removes
track from its group.
- -group-rem ID
- removes the track's group.
- -group-clean
- removes all group information from all tracks.
- -ref id:XXXX:refID
- adds a reference of type 4CC from track ID to track
refID.
- -dash DUR
- enables DASH-ing of the file with a segment duration of
DUR.
- -rap
- segments begin with random access points.
- -frags-per-sidx N
- sets the number of segments to be written in each SIDX
box.
- -segment-name name
- sets the segment name for generated segments.
- -segment-ext name
- sets the segment extension name. Default is m4s.
- -url-template
- uses UrlTemplate instead of explicit sources in
segments.
- -daisy-chain
- Uses daisy-chain SIDX instead of hierarchical. Ignored if
frags/sidx is 0.
- -dash-ctx FILE
- Stores/restore DASH timing from FILE.
- -dash-ts-prog N
- Program_number to be considered in case of an MPTS input
file.
When input file is an ISO-Media file (QT, MP4, 3GP), if no output is
specified THE INPUT FILE IS OVERWRITTEN.
HINTING OPTIONS¶
- -hint
- hint the file for RTPRTSP sessions. Payload type is
automatically detected and configured unless forced through one of MPEG-4
Generic RTP payload.
- -mtu size
- specifies Maximum Transmission Unit size in bytes (eg
maximum RTP packet size). Default size is 1500 bytes (Ethernet MTU). This
must be choosen carefully: specifying too large packets will result in
undesired packet fragmentation at UDP layer while specifying too small
packets will result in RTP header overhead.
- -copy
- forces hinted data to be copied to the hint track instead
of simply referenced. This speeds up RTP packet construction at the server
side but results in much bigger files.
- -tight
- performs sample-based interleaving of media tracks and hint
tracks. This should reduce disk seeks at server side (depending on server
implementation) but results in a bigger file.
- -multi [maxptime]
- enables Access Units concatenation in RTP packets if
possible. maxptime is optional and specifies the maximum packet duration
in milliseconds (default 100).
- -rate ck_rate
- specifies the rtp rate in Hz when no default rate for
payload. Default value is 90000 (MPEG rtp rates).
- -mpeg4
- forces usage of the MPEG-4 generic payload whenever
possible. Media tracks without a mapping to MPEG-4 Systems cannot use
this.
- -latm
- forces usage of the LATM payload for AAC audio.
- -static
- enables usage of static RTP payload IDs for streams with
official payload IDs. By default MP4Box always uses dynamic payload IDs
for maximum interoperability, some players having troubles with static
ones.
MPEG-4 Generic Payload Options (Experts only)
- -ocr forces all media tracks in the file to be
served synchronized. This is needed because most streaming servers don't
support desynchronized tracks in a single file. Be extremelly carefull
when designing MPEG-4 interactive presentations for streaming since you
will have to take care of the streaming server capabilities... MP4Box
generates warnings when the file timeline can be ambiguously interpreted
by the server.
- -rap signals Access Units random access flag in RTP
packets. This is usually only needed for streaming of MPEG-4 Systems
streams.
- -ts signals Access Units Time Stamps (CTS and DTS)
in RTP packets.
- -size signals Access Units size in RTP packets.
- -idx signals Access Units indexes (sequence numbers)
in RTP packets.
- -multi enables Access Units concatenation in RTP
packets (-ts, -size and -idx are selected if needed).
- -iod prevents system tracks embedding in IOD
(ISMA-like IOD) when generating in SDP. MP4Box automatically detects
ambiguous (ISMA/non-ISMA) files but nobody's perfect. This shouldn't be
used with -isma option.
- -add-sdp string
- adds string to movie SDP or track SDP (tkID:string, where
tkID is the OD of the hint track or its media track). This takes care of
SDP line reordering, but not of SDP content validity.
- -unhint
- removes all hint tracks and other hinting info from the
file.
IMPORT OPTIONS¶
- -add <src_file>
- adds all src_file tracks to input file, creating it if not
exisiting. Up to 20 cumulated -add operations can be used. Supported
syntaxes are:
file#video: imports first video track from src_file.
file#audio: imports first audio track from src_file.
file#trackID=ID or file#ID: imports given trackfrom src_file. To get a
listing of tracks in input file, use -info [ID]
[;lang=LAN]: specifies language of imported media.
[;delay=delay_ms]: specifies initial delay in milliseconds of imported
media.
- -cat <src_file>
- concatenates all src_file tracks to input file, creating it
if not exisiting. Media samples are added at the end of existing
compatible tracks. If no compatible track is found for a media it is
created. Up to 20 cumulated -cat operations can be used. Syntax is the
same as -add.
- -force-cat
- skips media configuration check when concatenating
file.
- -keepsys
- by default all MPEG-4 systems media are removed with -add
and -cat. This option will avoid removing them from final file.
- -keep-all
- keeps all existing tracks when add file.
- -dref
- keeps media data in original file an only imports meta-data
(frame timing, size and random access).
- NOTE
- Data referencing may fail with some AVI because it requires
the framed data (eg an MP4 sample) to be continuous in the original file,
which is not always the case depending on the original interleaving.
- -no-drop
- forces constant FPS when importing AVI video. By default
non coded frames (n-vop) are removed at import time, resulting in a
variable frame-rate media.
- -packed
- for CMP/M4V (raw MPEG-4 Visual), forces packed-bitstream
mode (removes all n-vops and import at constant frame rate).
- -sbr
- imports AAC as AAC-SBR, with backward compatible signaling
(non AAC-SBR decoders should be able to play it).
- -sbrx
- imports AAC as AAC-SBR, with non-backward compatible
signaling (non AAC-SBR decoders will not be able to play it).
- -ovsbr
- imports AAC as AAC-SBR with oversample SBR.
- -ps
- imports AAC as AAC-PS, with backward compatible signaling
of AAC-PS.
- -psx
- imports AAC as AAC-PS, with non-backward compatible
signaling (non AAC-PS decoders will not be able to play it).
- -fps FrameRate
- overrides the input video frame rate or specifies it for
SUB subtitles.
- -mpeg4
- forces using MPEG-4 sample descriptions rather than 3GP
ones (3GP2 QCELP/EVRC/SMV audio only).
- -agg N
- aggregates N audio frames in 1 sample (3GP media only).
Maximum possible value is 15, and default value is 1 (no
aggregation).
ENCODING OPTIONS¶
- -mp4
- specifies input file is for encoding. Supported inputs are
BT/XMT-A/WRL/SWF files. Output file name is by default the input file name
without extensions plus ".mp4" extension.
- -def
- encodes DEF'ed nodes and routes with their textual
names.
- -log
- generates BIFS encoder log file.
- -ms file
- specifies file for track importing - by default FILE.mp4 is
used when encoding FILE.bt (in-place rewrite). This option is only needed
if you don't provide a proper muxInfo per stream in the BT/XMT file.
- -sync time
- forces BIFS random access point generation every time
milliseconds. Cannot be used with -shadow. WARNING: this may result in
weird behavior of your presentation since a BIFS random access point
restarts all media currently running in the scene (EXPERTS ONLY -
DANGEROUS). Cannot be used with -shadow.
- -shadow time
- forces BIFS shadow random access points generation every
time milliseconds. Shadow samples are random access points that can be
used instead of non random access points when seeking. WARNING: this may
be not supported by some players (EXPERTS ONLY - DANGEROUS). Cannot be
used with -sync.
- -ctx-in file
- specifies initial context (MP4/BT/XMTA) for chunk
processing. Input file must then be a command-only file: no IOD, and no
implicit commands (commands without 'AT').
- -ctx-out file
- specifies output file of updated context (MP4/BT/XMTA) in
chunk processing mode. This is optional, chunk processing doesn't need to
store the final context.
- -resolution res
- LASeR resolution factor (-8 to 7, default 0). All coords
are multiplied by 2^res before truncation.
- -coord-bits bits
- bits used for encoding truncated coordinates in LASeR. (0
to 31, default 12)
- -scale-bits bits
- bits used for encoding truncated scales in LASeR. (0 to 4,
default 0)
- -auto-quant res
- Use automatic LASeR quantification. resolution is given as
if using -resolution but coord-bits and scale-bits are infered.
ISMACRYPT OPTIONS¶
- -crypt drm_file
- crypts a specific track using ISMA AES CTR 128.
- -decrypt [drm_file]
- decrypts a specific track using ISMA AES CTR 128. drm_file
can be omitted if keys are in file.
- -set-kms [tkID=]kms_uri
- changes KMS location for all tracks or a given one if tkID
is specified.
- DRM file syntax for GPAC ISMACryp
- File is XML and shall start with xml header. File root is
an "ISMACryp" element. File is a list of
"ISMACrypTrack" elements.
ISMACrypTrack attributes:
TrackID: ID of track to en/decrypt.
key: AES-128 key formatted (hex string 0x +32 chars.
salt: CTR IV salt key (64 bits) (hex string 0x +16 chars.
Encryption only attributes
Scheme_URI: URI of scheme used.
KMS_URI: URI of key management system - ´self´ writes key and salt
in the file.
selectiveType selective encryption type - understood values are
"None": all samples encrypted (default), "RAP": only
encrypts random access units, "Non-RAP": only encrypts
non-random access units, "Rand": random selection is
performed", "X": Encrypts every first sample out of X,
"RandX": Encrypts one random sample out of X.
ipmpType: IPMP Signaling Type: None, IPMP, IPMPX.
ipmpDescriptorID: IPMP_Descriptor ID to use if IPMP(X) is used. If not set
MP4Box will generate one for you.
- -raw TrackID
- extracts given track in native format when supported.
- -raws TrackID
- extract each track sample to a file. Note: 'TrackID:N'
extracts Nth sample of the track.
- -nhnt TrackID
- extracts given track in NHNT format. All track types except
ObjectDescriptors tracks can be exported.
- -nhml TrackID
- extracts track in nhml format (XML nhnt). All track types
except ObjectDescriptors tracks can be exported.
- -single TrackID
- extracts given track to a new mp4 file with a single
track.
- -avi TrackID
- extracts visual track to an avi file.
- -qcp TrackID
- same as '-raw' but defaults to QCP file format for AVRC and
SMV audio codecs.
- -aviraw TK
- extracts AVI track to its raw format. TK can be one of
"video", "audio" or "audioN" for multi-track
avi files (cf '-info').
- -saf
- remux file to SAF multiplex.
- -dvbhdemux
- demux DVB-H file into IP Datagrams.
- -diod
- extracts file IOD in raw format when supported.
DUMP OPTIONS¶
- -info [TrackID]
- prints movie and tracks information. If TrackID specified,
dumps only extended track info. If input file is not an IsoMedia file,
lists known tracks for import.
- -bt
- dumps complete scene in a BT file. This will remove unknown
MPEG4 nodes.
- -xmt
- dumps complete scene in an XMT-A file. This will remove
unknown MPEG4 nodes.
- -wrl
- dumps complete scene in an VRML97 WRL file. This will
remove unknown VRML97 nodes.
- -x3d
- dumps complete scene in an X3D XML file. This will remove
unknown X3D nodes.
- -x3dv
- dumps complete scene in an X3D Text (VRML) file. This will
remove unknown X3D nodes.
- -lsr
- dumps complete scene in a LASeR+XML file.
- -diso
- creates XML image of the file atoms.
- -drtp
- creates XML image of all hint tracks samples of a hinted
mp4 file.
- -dts
- prints sample timing to text output.
- -dcr
- creates XML image of all ISMACryp tracks samples of an mp4
file.
- -sdp
- creates SDP file associated with a hinted mp4 file.
- -dump-cover
- Extracts cover art if any.
- -dump-chap
- Extracts chapter list to file if any.
- -ttxt
- converts input subtitle to GPAC TTXT format.
- -ttxt trackID
- exports given text track to GPAC TTXT format.
- -srt
- converts input subtitle to SRT format.
- -srt trackID
- exports given text track to SRT subtitle format.
- -std
- dumps to stdout rather than file.
- -stat
- generates statitistic report on node/field usage for the
whole presentation.
- -stats
- generates statistic report on node/field usage per BIFS
Access Unit.
- -statx
- generates statistic report on node/field usage in the scene
graph after each BIFS Access Unit.
- -hash
- generates SHA-1 Hash of the input file.
MP4Box supports the Meta addition to IsoMedia file format, used to make the file
a generic data container (timed or untimed).
- -set-meta args
- sets meta object type. Syntax is "ABCD[;tk=N] where:
ABCD is the four character code of the type, or O/NULL to remove the meta
object
tk indicates whether the meta is at the root level (no "tk"), at
the moov level (tk=0) or at the track level (tk=trackID).
- -add-item args
- adds resource to the given meta. args is the item file path
followed by ';' separated options:
tk=N: same as above
name=item_name: specifies the item name, otherwise file name is used
mime=mimeType: specifies the item mime type, otherwise
application/octet-stream is used
encoding=enctype: specifies the content encoding type Note that file path
set to "this" or "self" will identify the item added
as the whole IsoMedia file
- -rem-item args
- removes item from given meta. Syntax is
itemID[;tk=ID].
- -set-primary args
- sets given item as the primary one of the given meta.
Syntax is itemID[;tk=ID].
- -set-xml args
- sets XML to the given meta. Syntax is
xml_file_path[;tk=ID][;binary].
- -rem-xml [tk=ID]
- removes XML data from the given meta.
- -dump-xml xml_out_file_name[;tk=ID]
- dumps the XML data of the given meta to a file.
- -dump-item itemID[;tk=ID][;path=fileName]
- dumps the given item of the the given meta to a file. By
default the item name is used as the output file name.
- -package
- packages input XML file into an ISO container. all media
referenced except hyperlinks are added to file.
- -mgt
- packages input XML file into an MPEG-U widget in ISO
container. All files contained in the current folder are added to the
widget package.
RTP STREAMER OPTIONS¶
MP4Box can stream ISO files to RTP. The streamer currently doesn't support data
carrouselling and will therefore not handle BIFS and OD streams properly.
- -rtp
- enables rtp file streamer.
- -noloop
- disables looping when streaming.
- -mpeg4
- forces MPEG-4 ES Generic for all RTP streams.
- -dst=IP
- IP destination (uni/multi-cast). Default: 127.0.0.1.
- -port=PORT
- output port of the first stream. Default: 7000.
- -mtu=MTU
- path MTU for RTP packets. Default is 1450 bytes.
- -ifce=IP
- IP address of the physical interface to use. Default: NULL
(ANY).
- -ttl=N
- time to live for multicast packets. Default: 1.
- -sdp=FILE
- file name of the generated SDP. Default is
session.sdp.
LIVE SCENE STREAMER OPTIONS¶
MP4Box can stream BIFS or DIMS content to RTP with carousel generation and
updates. The streamer currently doesn't support audio/video/image streaming at
the same time. All options supported by the file streamer are supported.
- -live
- enables rtp live streamer.
- -dims
- turns on DIMS mode for SVG input - default: off.
- -src=FILE
- source of updates - default: null.
- -rap=TIME
- duration in ms of base carousel - default: 0 (off). you can
specify the RAP period of a single ESID (not in DIMS) with
-rap=ESID=X:time.
- Runtime Options
- The following options can be used at prompt:
q: quits
u: inputs some commands to be sent
U: same as u but signals the updates as critical
e: inputs some commands to be sent without being aggregated
E: same as e but signals the updates as critical
f: forces RAP sending
F: forces RAP regeneration and sending
p: dumps current scene
SWF OPTIONS¶
MP4Box can import very simple Macromedia Flash files (".SWF"). You can
specify a SWF input file with -bt, xmt and -mp4 switches.
- -global
- all SWF defines are placed in first scene replace. By
default SWF defines are sent when needed.
- -no-ctrl
- uses a dedicated stream for movie control. This will
disable ActionScript.
- -no-text
- removes all SWF text.
- -no-font
- removes all embedded SWF Fonts, forcing usage of MPEG-4
Text and terminal fonts.
- -no-line
- removes all lines from SWF shapes.
- -no-grad
- removes all gradients from swf shapes.
- -quad
- uses quadratic bezier curves instead of cubic ones.
- -xlp
- support for lines transparency and scalability.
- -flatten Value
- replaces 2 consecutive lines by a single one when angle
between lines is less than Value (expressed in radians). Value 0 disables
flattening.
- RAW Formats and extensions
- NHNT (.media .nhnt .info)
MPEG Audio (.mp3)
ADTS-AAC (.aac)
MPEG-4 Visual (.cmp .m4v)
H263 Video (.263 .h263)
AVC/H264 Video (.h264 .h26L .264 .26L)
JPEG Images (.jpg .jpeg)
PNG Images (.png)
AMR(WB) Audio (.amr .awb)
EVRC Audio (.evc)
SMV Audio (.smv)
- Container Formats and extensions
- AVI (.avi)
MPEG-PS (.mpg .mpeg .vob .vcd .svcd)
QCP (.qcp)
OGG (.ogg)
ISO-Media files (no extension checking)
- Text Formats and extensions
-
SRT Subtitles (.srt)
SUB Subtitles (.sub)
GPAC Timed Text (.ttxt)
QuickTime TeXML Text (.xml) (cf QT documentation)
- Scene Formats and extensions
- MPEG-4 XMT-A (.xmt .xmta .xmt.gz .xmta.gz)
MPEG-4 BT (.bt .bt.gz)
VRML (.wrl .wrl.gz)
X3D-XML (.x3d .x3d.gz)
X3D-VRML (.x3dv .x3dv.gz)
MacroMedia Flash (.swf) - very limitted import support only
COMMON USAGE¶
- Importing a file
- Import an AVI: MP4Box -add myfile.avi mymp4.mp4
Import audio from an AVI: MP4Box -add myfile.avi#audio mymp4.mp4
Import video from an AVI: MP4Box -add myfile.avi#video mymp4.mp4
Import an MP3 and leave data outside: MP4Box -dref -add myfile.mp3 mymp4.mp4
Import a JPEG or PNG: MP4Box -add myfile.jpg mymp4.mp4
Create a movie with subtitle: MP4Box -add video.avi -add audio.mp3 -add
Subtitle.srt mymp4.mp4
- Base File operations
- Convert file for HTTP/FTP streaming: MP4Box -inter 1000
myfile.mp4
Convert unknown file to ISMA for HTTP/FTP streaming: MP4Box -isma -inter
1000 myfile.mp4
Convert unknown file to ISMA and respect ISMA broken sync: MP4Box -ismax
myfile.mp4
Convert unknown file to 3GP : MP4Box -3gp myfile.mp4
- Hinting a File
- Prepare any mp4 for ISMA streaming: MP4Box -isma -hint
myfile.mp4
Prepare any 3GP for streaming: MP4Box -hint myfile.3gp
Prepare any 3GP for streaming with RTP aggregation : MP4Box -hint -multi
myfile.3gp
Prepare a simple audio/video mp4 optimized for server: MP4Box -hint -copy
-tight myfile.mp4
Prepare a complex mp4 with BIFS for streaming: MP4Box -ocr -iod -hint
myfile.mp4
- Encoding/Decoding a file
- Encode a BT file and keep node names for later inspection:
MP4Box -mp4 -def pres.bt
Encode a XMT-A file: MP4Box -mp4 pres.xmt
Translate BT to XMT-A file: MP4Box -xmt pres.bt
Translate XMT-A to BT file: MP4Box -bt pres.xmt
Decode MP4 to BT: MP4Box -bt pres.mp4
BUGS and OTHER HELP¶
- For bug reports, more information on BT or XMT-A formats or
GPAC TTXT files or ISMACryp, MPEG-4 Systems usage and more help on MP4Box
please visit the GPAC web site http://gpac.sourceforge.net
AUTHORS¶
Jean Le Feuvre <jeanlf@users.sourceforge.net> - GPAC (c) 2000-2005 - (c)
Telecom ParisTech 2005-2011
SEE ALSO¶
GPAC(1),
MP4Client(1)