tcdecode(1)
NAME
tcdecode - read multimedia streams from medium, decode to raw format and print to standard output
SYNOPSIS
tcdecode
-i name [ -x codec ] [ -t package ] [ -g WxH ] [ -s c,f,r ] [ -C
s-e ] [ -y codec ] [ -Y ] [ -Q mode ] [ -A flag ] [ -d verbosity
] [ -v ]
COPYRIGHT
tcdecode is Copyright (C) by Thomas Oestreich.
DESCRIPTION
tcdecode is part of and usually called by transcode. However, it can also be used independently. tcdecode reads source (from stdin if not explicitely defined) and prints on the standard output.
OPTIONS
-i name
Specify input source. If ommited, stdin is assumed. tcdecode
reads streams from file or from stdin.
-g WxH video frame width and height [720x576]
-C s-e decode and print out only this frame interval (video) or bytes
(audio) [all].
-x codec
source codec, if not detected of reading from stdin. This option
also specifies video and audio context of the source for
decoding. Currently, supported parameter for codec are
mp3 MPEG audio (lame)
ac3 AC3 audio (liba52)
dv Digital Video DV (libdv)
mpeg2 MPEG video (libmpeg2)
yv12 Y'CbCr YUV
mov Quicktime (libquicktime)
-t package
Currently only argument supported is "lavc". Use the codec by -x
from this package. Available (-x) codecs for lavc are: mpeg2,
divx3, divx, divx4, mp42, mjpg, rv10, svq1, svq3, vp3, 4xm,
wmv1, wmv2, hfyu, indeo3, h263p, h263i
-y codec
target codec. tcdecode only decodes to raw format suitable for
transcode. Valid option parameter for codec are
rgb RGB 24bit
yv12 Y'CbCr YUV
yuy2 4:2:2 YUV
pcm SIGNED LE 16bit PCM
-s c,f,r
audio gain for AC3 downmixing [1.0,1.0,1.0]
-Y decoded Digital Video (raw) YUV frame is in YUY2 (packet) format
using libdv. Downsample frame to YV12. PAL users should compile
libdv with --with-pal-yuv=YV12 to avoid this option [off]
-A flag
audio flag for AC3/A52 decoder [none]. This flag determines the
down-mixing configuration. Valid choices for flag are determined
by the following bits set:
drc off 1
demux 2
dolby off 4
Add those numbers to turn multiple options on.
-Q mode
decoding quality. Certain codecs, e.g., DV with libdv allow for
changing this parameter if speed is prefered over quality.
Valid parameter are 1=fastest-5=best [5].
-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 corresponding values:
QUIET 0
INFO 1
DEBUG 2
STATS 4
WATCH 8
FLIST 16
VIDCORE 32
SYNC 64
COUNTER 128
PRIVATE 256
-v Print version information and exit.
NOTES
tcdecode is a front end for decoding various sources and is used in transcode(1)'s import modules.
EXAMPLES
The command
tcdecode -i foo.mp3 -x mp3
decodes an MPEG audio stream and prints raw PCM data to stdout.
The command
tcextract -i foo.avi -x mp3 | tcdecode -x mp3
extracts an MPEG audio track from the AVI-file foo.avi and pipes the
frames into the decoder
AUTHORS
tcdecode was written by Thomas Oestreich <[email protected]> with contributions from many others. See AUTHORS for details.
SEE ALSO
avifix(1), avisync(1), avimerge(1), avisplit(1), tcprobe(1), tcscan(1), tccat(1), tcdemux(1), tcextract(1), tcdecode(1), transcode(1)
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