USAGE: mjpeg2jpg <mjpg-file> [-l[ist] <mode>]
       verify and/or list properties of <mjpg-file>.
USAGE: mjpeg2jpg <mjpg-file> <dest> [<key> <value> ..]
       extract one or more JPG-files from <mjpg-file>.
DEST:
  "[<path><slash>][<prefix>]%[[0]<width>]d[<suffix>].jpg"
  %d replaced by <filenumber> or a single file
  "<basename>.jpg"
USAGE: mjpeg2jpg <Intellinet mp4-file> <dest mp4-file> [<key> <value> ..]
       extract mp4-stream from downloaded file.
KEY          VALUE           DESCRIPTION AND DEFAULT
-b[egin]     <first picture> picturenumber to save. Default: 0
-e[nd]       <last picture>  terminate process. Default: 8640000
-f[irst]     <filenumber>    in filename <dest>. Default: 0
-i[ncrement] <count>         increment of <filenumber>. Default: 1
-i[ncrement] t[ime]          add seconds in day to first <filenumber>.
-j[ump]      <pictures>      increment picturenumber to save. Default: 1
-l[ist]      q[uiet]         do not write progress to stdout.
-l[ist]      s[tatist]       write statistics to stdout.
-s[elect]    <percentage>    write <dest> only if maximumJPGpayloadsize >=
                             (1+0.01*<percentage>)*minimumJPGpayloadsize
                             calculated over <mjpg-file> as far as read.
-t[ype]      a[udio]         extract Content-Type audio/basic.
-t[ype]      j[peg]          extract Content-Type image/jpeg.
-t[ype]      m[peg]          extract Content-Type video/mpeg.
                             By default image/jpeg or video/mpeg is extracted
                             whichever is found first.

    Error messages are written to stderr.

SYNTAX OF MJPEG-FILES:
   "--ThisRandomString" or "--myboundary"
   "Content-Type: image/jpeg"
   "Content-Length: ######"
   ""
   ###### bytes JPG-file payload
   ""    All lines end on \r\n (0x0d0a).

SYNTAX OF "MP4"-FILES:
   "--myboundary"
   "Content-Type: image/mpeg" or
   "Content-Type: audio/basic" (ignored by default)
   "Content-Length: #[#####]"
   ""
   #[#####] bytes JPG-file payload
   ""    All lines end on \r\n (0x0d0a).

NOTE: Use ffmpeg 0.5 to extract pictures from an Intellinet IP-Cam MP4-stream.
Copyright (C) 2011 by Harm J. Schoonhoven

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
VERSION: Jun 24 2014