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
<ostreich@theorie.physik.uni-goettingen.de> 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)