lavtrans(1) [suse man page]

lavtrans(1)							MJPEG tools manual						       lavtrans(1)

NAME

       lavtrans - Convert MJPEG videos to other MJPEG video formats

SYNOPSIS

       lavtrans -o outputfile -f a|q|i|w [-i num] lavfile1 [lavfile2 ... lavfileN]

DESCRIPTION

       lavtrans  can  be  used	to convert the recorded videos from one MJPEG "container" format  to another one. It can also be used to split the
       streams, or do destructive edits.

       Like all the other mjpegtools(1) lavtrans also accept a edit list file in place of actual video files. This allows it to be  used  to  con-
       struct a stand-alone copy of the editted video sequence described in the editlist.

       Note that lavtrans can only change the container type of MJPEG video, not the format.  As such it is not possible to use it combine streams
       of different format.

OPTIONS

       lavtrans accepts the following options:

       -f [a|q|m|i|w]
	    Specifies the output format that should be saved.
	      a - output to AVI file
	      q - output to Qicktime file
	      i - output single JPEG images,
	      w - output WAV file (sound only!)

       -i num
	    Convert a single frame to a JPEG file.

       -o outputfile
	    Specifies the name of the output file If you want as output single JPEG images the output file string must be a valid format string

       filename
	    Multiple filenames as input are acceped, also mixing of edit list files and other in video files.

BUGS

       There seem to be problems with the transoding of large Quicktime movies. One other thing is that with interlaced movies only one  field	is
       extracted.  So you get pictures with the full horizontal size and half vertical size.

AUTHOR

       This man page was written by Bernhard Praschinger.
       If you have questions, remarks, problems or you just want to contact the developers, the main mailing list for the MJPEG-tools is:
	 mjpeg-users@lists.sourceforge.net

       For more info, see our website at
	      http://mjpeg.sourceforge.net

SEE ALSO

       mjpegtools(1), lavplay(1)

MJPEG Linux Square						    2 June 2001 						       lavtrans(1)

lav2wav(1)							MJPEG tools manual							lav2wav(1)

NAME

       lav2wav - Extract the audio out of MJPEG container files to stdout

SYNOPSIS

       lav2wav [-s num] [-c num] [-v num] [-I] [-R] [-r samplerate, bitesize, channels] lavfile1 [lavfile2 ... lavfileN]

DESCRIPTION

       lav2wav	can  be  used to extract the audio to stdout.  This output goes to stdout and can be saved as a wav file or piped to another sound
       processing tool that is able to handle the wav format.  This can be mp2enc and toolame for mpeg layer 2 audio, or for example lame for mpeg
       layer 3 audio.

       The  input  files  may be any combination of AVI (.avi), Quicktime (.qt) or editlist files so long as they are all lavtools- readable (e.g.
       MJPEG-encoded AVI/Quicktime or DV type 2 AVI).

OPTIONS

       lav2wav accepts the following options:

       -s num
	    Start extracting at video frame (num)

       -c num
	    Extract (num) frames of audio

       -v num
	    Verbosity level (0, 1 or 2)

       -I   Ignore unsupported bitrates/bits per sample

       -R   If the file does not contain any sound. lav2wav will create silence with 44100kHz Sampelrate, 16 Bit audio bitsize and 2 Chanels

       -r sr,bs,ch
	    If the file does not contain any sound lav2wav will generate silence with the values you supply  the  samplerate  (sr),  audio-bitsize
	    (bs) and channel (ch).

BUGS

       The  "WAV"  file  format (technically: RIFF) is really very much less than ideal for a tool intended to be used in pipelines as lav2wav is.
       The problem is that the header includes a field specifying the length of the file.  This can't be filled in except by seeking back  to  the
       begining  and  over-writing.  If the output is unseekable (e.g. pipe) lav2wav simply writes a large length into the header and leaves it at
       that.  Most tools like sox(1) or mp2enc(1) either ignore the length field anyway or only give a warning.
       The audio length is inacurate calculated when lav2wav generates silence.  This happens only if you have NTSC framerate and than it  creates
       for every hour of video 1.1498sec too less of silence.

AUTHOR

       This man page was written by Bernhard Praschinger.
       If you have questions, remarks, problems or you just want to contact the developers, the main mailing list for the MJPEG-tools is:
	 mjpeg-users@lists.sourceforge.net

       For more info, see our website at
	      http://mjpeg.sourceforge.net

SEE ALSO

       mjpegtools(1), mp2enc(1), sox(1)

MJPEG Linux Square						    2 June 2001 							lav2wav(1)