[DVDnav-discuss] undvd utility

[Jorgen Lundman]

This is possibly not relevant to everyone here, but might be useful. At the very 
least, it has been great for debugging.

I was fixing bugs in my DVD/Bluray playing code, being unhappy about how 
complicated it had become. Then it occurred to me the fix I was about to apply 
already existed for plain RAR playing code, which calls "unrar" to list and play 
media.

So I created a "undvd", which simulates all arguments and output of "unrar", to 
list (undvd v ), send to stdout (undvd p) and extract (undvd x).

Now all RAR files, DVD images (iso, img, toast, VIDEO_TS, bluray and /dev/drive) 
can use the same function that calls unrar, (and now undvd).

Since my version of libdvdnav has RAR code, it can also handle ISO inside RAR 
files. Although, I should note I fixed some bugs in the opendir/readdir code.


If undvd is compiled without the UDF2.50/bluray code, it can be used against the 
vanilla libdvdnav library.




Example output:



**** 1 : Bluray ISO

  # ./undvd v -d -v -c- -p- -y -cfg- -- movietest-bd5.iso
UNDVD 3.71 beta 1 freeware    Copyright (c) 2009- Jorgen Lundman

Archive movietest-bd5.iso

Pathname/Comment
                   Size   Packed Ratio  Date   Time     Attr      CRC   Meth Ver
-------------------------------------------------------------------------------
  BDMV
              0            0   0% 01-12-09 12:15 drw-r--r-- 00000000 m0 2.0
[snip]
  BDMV/STREAM
              0            0   0% 01-12-09 12:15 drw-r--r-- 00000000 m0 2.0
  BDMV/STREAM/00001.m2ts
     4691957760   4691957760 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0
[snip]




***** 2 : Standard DVD


# ./undvd v -v -c- -p- -y -cfg- -- dvdr.iso

Pathname/Comment
                   Size   Packed Ratio  Date   Time     Attr      CRC   Meth Ver
-------------------------------------------------------------------------------
  title_01
              0            0   0% 01-12-09 12:15 drw-r--r-- 00000000 m0 2.0
  title_01/audio_00_en_AC3_2ch.mpg
      349093888    349093888 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0
  title_01/audio_01_nl_AC3_2ch.mpg
      349093888    349093888 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0
[snip]



***** 3 : Standard DVD in RAR


# ./undvd v -R testdvdr.iso -v -c- -p- -y -cfg- -- test-dvdr.rar

Pathname/Comment
                   Size   Packed Ratio  Date   Time     Attr      CRC   Meth Ver
-------------------------------------------------------------------------------
  title_01
              0            0   0% 01-12-09 12:15 drw-r--r-- 00000000 m0 2.0
  title_01/audio_00_en_AC3_6ch.mpg
     3420518400   3420518400 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0
  title_01/audio_01_fr_AC3_6ch.mpg
     3420518400   3420518400 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0
  title_01/audio_02_es_AC3_6ch.mpg
     3420518400   3420518400 100% 01-12-09 12:15 -rw-r--r-- 00000000 m0 2.0



****** 4 : Extracting title from DVD (debug on)


# ./undvd x -sk2000000 -d -v -c- -p- -y -cfg- -- dvdr.iso 
title_01/audio_00_en_AC3_2ch.mpg
Seek: 2000000
archive: dvdr.iso
extract: title_01/audio_00_en_AC3_2ch.mpg
Attempting to extract 'title_01/audio_00_en_AC3_2ch.mpg' from 'dvdr.iso' (in '') 
from position 2000000...
libdvdnav: DVD disk reports itself with Region mask 0x00000000. Regions: 1 2 3 4 
5 6 7 8
title 01 audio stream 00
Seek block set to 976 modulus 1152.
Block 0 HOP_CHANNEL
Block 0 HIGHLIGHT
Block 0 VTS_CHANGE
Block 0 CELL_CHANGE: 0
finally seeking towards block 976
Block 0 HOP_CHANNEL
Block 0 CELL_CHANGE: 183600
Block 0 SPU_CLUT_CHANGE
Block 0 SPU_STREAM_CHANGE
Block 0 AUDIO_STREAM_CHANGE
Block 0 NAV_PACKET
Finally at seek position!
Block 63 NAV_PACKET
Block 273 NAV_PACKET
Block 461 NAV_PACKET
[snip]

-rw-r--r--  1 lundman  lundman   388M Sep 18 17:21 title_01_audio_00_en_AC3_2ch.mpg


But yes, it doesn't do anything with DVD Menus, just streams.



-- 
Jorgen Lundman       | <lundman at lundman.net>
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