_______ ____________ _______ _\__ /_________ ___ _____ | _ _ \ _ | ____\ _ / | |/ _ \ | / / / / | | | /___/ _ | | / / |___/___/ /___/____|________|___ | |_| |___|_____/ \__/ |___|

Step 1: determine frame-rate

We have an image every 5 minutes, so that’s 12 frames per minute. In order to be able to see what is happening on the camera’s, we decided to use a framerate of 10 fps.

Step 2: mencoder, stich!

Now we can use mencoder to start stiching the movie to an AVI file:

shell$ mencoder mf://cam1/*/*/*.jpg -mf fps=10:type=jpg -ovc lavc -oac copy -o cam1.avi
MEncoder dev-SVN-r26940 (C) 2000-2008 MPlayer Team
CPU: Intel(R) XEON(TM) CPU 2.40GHz (Family: 15, Model: 2, Stepping: 4)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
success: format: 16  data: 0x0 - 0x0
MF file format detected.
[mf] search expr: cam1/*/*/*.jpg
[mf] number of files: 3879 (15516)
VIDEO:  [IJPG]  0x0  24bpp  10.000 fps    0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:16  fourcc:0x47504A49  size:0x0  fps:10.000  ftime:=0.1000
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
VDec: vo config request - 704 x 576 (preferred colorspace: Planar 422P)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Planar 422P as output csp (no 1)
Movie-Aspect is undefined - no prescaling applied.
SwScaler: reducing / aligning filtersize 1 -> 4
Writing header...
Pos:   2.4s     24f ( 0%) 13.45fps Trem:   0min   0mb  A-V:0.000 [1349:0]
...

Parameters explained:

mf://cam1/*/*/*.jpg

Images reside in sub directories tagged YYYY/MM/DD/SEQUENCE.jpg

-mf fps=10:type=jpg

We wanted 10 fps, source image type is JPG

-ovc lavc

Use libavcodec fast library to encode the AVI

-oac copy

We have no audio, so a blank stream will be copied

-o cam1

Write the result to cam1.avi

Step 3: ffmpeg, convert to DVD

We wanted to have a DVD with the footage, so convert the movie(s) to DVD compatible MPEG-4:

shell$ ffmpeg -i cam1.avi -target pal-dvd -aspect 4:3 -sameq cam1.mpg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis
    --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394
  libavutil version: 1d.49.3.0
  libavcodec version: 1d.51.38.0
  libavformat version: 1d.51.10.0
  built on Mar 16 2009 21:16:26, gcc: 4.2.4 (Ubuntu 4.2.4-1ubuntu3)
Input #0, avi, from 'cam1.avi':
  Duration: 00:06:29.4, start: 0.000000, bitrate: 809 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 704x576, 10.00 fps(r)
Output #0, dvd, to 'cam1.mpg':
  Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=2-31, 6000 kb/s, 25.00 fps(c)
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
frame=   12 q=0.0 Lsize=     532kB time=0.4 bitrate=9904.9kbits/s
video:270kB audio:0kB global headers:0kB muxing overhead 97.308936%
...

Step 4: dvdauthor, rounding up

Now use dvdauthor to create your DVD filesystem layout (we ended up with 5 movies):

shell$ dvdauthor --title -f all.mpg -f cam1.mpg -f cam2.mpg -f cam3.mpg -f cam4.mpg -o DVD
DVDAuthor::dvdauthor, version 0.6.14.
Build options: gnugetopt magick iconv freetype
Send bugs to <dvdauthor-users@lists.sourceforge.net>

INFO: dvdauthor creating VTS
STAT: Picking VTS 01

STAT: Processing all.mpg...
STAT: VOBU 800 at 349MB, 1 PGCS
INFO: Video pts = 0.500 .. 389.780

STAT: Processing cam1.mpg...
STAT: VOBU 1611 at 541MB, 1 PGCS
INFO: Video pts = 0.500 .. 388.300

STAT: Processing cam2.mpg...
STAT: VOBU 2419 at 741MB, 1 PGCS
INFO: Video pts = 0.500 .. 388.100

STAT: Processing cam3.mpg...
STAT: VOBU 3227 at 1112MB, 1 PGCS
INFO: Video pts = 0.500 .. 388.580

STAT: Processing cam4.mpg...
STAT: VOBU 4029 at 1436MB, 1 PGCS
INFO: Video pts = 0.500 .. 388.900
STAT: VOBU 4039 at 1440MB, 1 PGCS
INFO: Generating VTS with the following video attributes:
INFO: MPEG version: mpeg2
INFO: TV standard: pal
INFO: Aspect ratio: 4:3
INFO: Resolution: 720x576

STAT: fixed 4039 VOBUS
shell$ dvdauthor -T -o DVD
DVDAuthor::dvdauthor, version 0.6.14.
Build options: gnugetopt magick iconv freetype
Send bugs to <dvdauthor-users@lists.sourceforge.net>

INFO: dvdauthor creating table of contents
INFO: Scanning DVD/VIDEO_TS/VTS_01_0.IFO

Now we have a file-tree we can burn on a DVD-R:

shell$ tree DVD
DVD
|-- AUDIO_TS
`-- VIDEO_TS
    |-- VIDEO_TS.BUP
    |-- VIDEO_TS.IFO
    |-- VTS_01_0.BUP
    |-- VTS_01_0.IFO
    |-- VTS_01_1.VOB
    `-- VTS_01_2.VOB

2 directories, 6 files