jpeg2yuv(1) [debian man page]
jpeg2yuv(1) MJPEG tools manual jpeg2yuv(1) NAME
jpeg2yuv - Convert jpeg images to the yuv format. SYNOPSIS
jpeg2yuv [-b num] [-f num] [-I num] [-A ratio] [-L num] [-n num] [-l num] [-j filename] DESCRIPTION
jpeg2yuv decompresses a sequence of JPEG files and pipes the image data to stdout as a YUV4MPEG2 stream. Any JPEG format supported by lib- jpeg can be read. stdout will be filled with the YUV4MPEG2 movie data stream, so be prepared to pipe it on to mpeg2enc or to write it into a file. OPTIONS
jpeg2yuv accepts the following options: -b num Frame offset: skip output of the first 'num' frames. (default: 0) -f num Set the frame rate of stream accepts the same numbers. No default, this option has to be specified. -A ratio Sample aspect ratio. Default is square pixels (1:1) -I num interlacing mode: p = none / progressive t = top field first b = bottom field first No default, this option has to be specified. -L num 0 = non-interlaced (two successive fields per JPEG file) 1 = interlaced fields -l num Specifies the number of loops (default: 0 loops ) When this option is not used the given range of images is only processed once. If you use this option with num of -1 jpeg2yuv will loop forever writing the image to stdout. When you use n > 0 it will loop n-times till it finishes. -n num Specifies the number of frames to process. (default: all = -1) -j {1}%{2}d{3} Read JPEG frames with the name components as follows: {1} JPEG filename prefix (e g: picture_ ) {2} Counting placeholder (like in C, printf, eg 06 )) {3} File extension. Something like this: .jpg A correct description of the files could look like this: picture_%06d.jpg If this option is omited, the filenames are read from stdin. For example: $ls *jpg | jpeg2yuv -f 25 -I p > result.yuv -R 1 or 0 rescale YUV color values from 0-255 to 16-235 (default: 1) -v num Verbosity level (0, 1 or 2) BUGS
The frame rate description seems not to be up to date. The NTSC integer ratios seem not to be supported. As a workaround specify a PAL (25) or FILM (24) and set the right frame rate in mpeg2enc with the -F option. 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), mpeg2enc(1), ppmtoy4m(1), yuv2lav(1), yuvdenoise(1), yuvmedianfilter(1), yuvscaler(1) MJPEG Linux Square 8 December 2001 jpeg2yuv(1)
Check Out this Related Man Page
lav2yuv(1) MJPEG tools manual lav2yuv(1) NAME
lav2yuv - Convert a MJPEG file to raw yuv SYNOPSIS
lav2yuv [options] lavfile1 [lavfile2 ... lavfileN] DESCRIPTION
lav2yuv converts an MJPEG video sequence described by a sequence of MJPEG video files and/or edit lists pointing to such files into the simple uncompressed planar 4:2:0 Y'CbCr format, as used by mpeg2enc(1) MPEG encoder and image processing filters like yuvscaler(1) or yuv2dfilter(1) or yuvdenoise(1). Output is to stdout so that by piping the output of lav2yuv into a suitable pipeline it is possible to process and then encode or play back video recorded in any of the mjpegtools MJPEG container formats: AVI, quicktime or edit lists describing editted versions of video held in such files. Mixing different files with different video formats is currently not possible. The -S -T -D options are used for scene detection which is used by linux video studio. OPTIONS
lav2yuv accepts the following options: -m Force mono-chrome -c Conceal frames containing corrupt MJPEG data by repeating the preceeding good frame. -S list.el Output a scene list with scene detection -T num Set scene detection threshold to num (default: 4) -D num Width decimation to use for scene detection (default: 2) -o num Frame offset - skip num frames at the beginning. if num is negative all but the last num frames are skipped -f num Only num frames are written to stdout. 0 means that all frames are processed. -A width:height Set/override the sample aspect ratio (SAR) emitted in the output stream header. Currently, the SAR is only auto-detected for DV files, and guessed otherwise. -P width:height Set the intended/approximate display aspect ratio (DAR) for the stream. This value is only used to guess the SAR when it cannot be detected from the input stream. The default DAR is '4:3' (corresponding to a standard TV screen); another useful value is '16:9' (corresponding to widescreen TV). -C chroma Set output chroma (default: '420jpeg'). Currently, '420jpeg', '420mpeg2', '420paldv', '422' are available. -x Exchange fields. Useful if the field order was reversed during editing. AUTHOR
This man page was originally 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), mpeg2enc(1), yuvscaler(1), yuv2lav(1), yuvdenoise(1), yuvplay(1) MJPEG Linux Square 6 March 2002 lav2yuv(1)