|tcdemux(1)||General Commands Manual||tcdemux(1)|
tcdemux - demultiplex a program stream
- -i name [ -t magic ] [ -x codec ] [ -S unit,[s1-s2] ] [ -a ach,[vch] ] [ -s 0xnn ] [ -M mode ] [ -f fps ] [ -W ] [ -O ] [ -P name ] [ -A n[,m[,...]] ] [ -d verbosity ] [ -v ]
tcdemux is Copyright (C) by Thomas Oestreich.
tcdemux is part of and usually called by transcode.
However, it can also be used independently.
tcdemux reads source (from stdin if not explicitely defined) and prints on the standard output.
- -i name
- Specify input source. If ommited, stdin is assumed.
- -x codec
- Process only packets containing given codec as payload. Examples
are "mpeg2" for MPEG video or "ac3" for audio packets.
- -t magic
- Specify the input file type magic. Useful for using tcdemux
in pipelines. This is normally autodetected.
- -a ach[,vch]
- Process only packets containing given audio track ach and video
track vch. Most program stream feature multiple audio tracks but
only a single video stream. Default is "-a 0,0".
- -s 0xnn
- Select specific multimedia track using the standard identifier
0xnn. This useful to extract subtitle packets.
- -f fps
- Specify the frame rate fps for subtitle meta information used by
- -S unit[,s1-s2]
- Select a program unit unit and a selected GOP range s1-s2
for processing. A unit is usually a set of GOPs that need to be
synchronized at the very beginning. This option can be used to eleminate
junk units at the beginning of the main presentation or to select certain
episodes of a TV series from a DVD. A GOP is a logical unit to be properly
decoded, i.e., decoding can only start at the beginning of a GOP.
- Do not skip initial sequence. Used internally by transcode.
- -A n[,m[,...]]
- Select packets using an identifier for extracting only selected streams
without processing. This is useful for size reduction of your multimedia
tcdemux -i big_dvd.vob -A 0xe0,0x81,0x20 > small_dvd.vob
extracts all packets for the video stream, AC3 audio track (1) and the first subtitle stream (0).
- -M mode
- Select synchronization strategy mode. This is how transcode selects
the beginning of a video and audio stream to assure both streams are
sychronized for further processing:
0 no synchronization. Packets are printed directly to stdout.
1 synchronization based on PTS information found in the packet header. Audio packets are delayed until a suitable starting point is found. Default for PAL videos.
2 NTSC adapted synchronization mode. Detailed information for each GOP contained in the video stream are piped to a stdout to be processed by the certain import modules. This enables adjusting the frame rate or inverse telecine, if necessary.
3 more advanced synchronization mode 1 with msec granular adjustment. Details delegated to transcode.
4 more advanced synchronization mode 2 with msec granular adjustment for NTSC materail. Details delegated to transcode.
5-7 undocumented debugging modes for internal use.
- -P file
- Write GOP meta information to file instead of tdout.
- Print a navigation log file for a given video stream to stdout.
This is used for transcode's "psu mode" and "cluster
- -d level
- With this option you can specify a bitmask to enable different levels of
verbosity (if supported). You can combine several levels by adding the
- Print version information and exit.
tcdemux is a front end for de-multiplexing program streams and is used in transcode's import modules.
tcprobe -i movie.vob -x mpeg2
extracts only MPEG video packets. Further processing, i.e., extracting the elementary video stream is done by tcextract.
tcdemux was written by Thomas Oestreich
<firstname.lastname@example.org> with contributions from many others. See AUTHORS for details.
avifix(1), avimerge(1), avisplit(1), tcdecode(1), tcdemux(1), tcextract(1), tccat(1), tcscan(1), transcode(1)
|09th January 2003||tcdemux(1)|