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)

tcdecode(1) 23th August 2003 tcdecode(1)