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vmgi [2014/05/16 20:05] – beandogvmgi [2015/01/16 06:29] (current) – beandog
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   * [[VMG]]   * [[VMG]]
  
-Data found in ''VIDEO_TS.IFO'' and ''VIDEO_TS.BUP'' files.+The VMGI is the primary [[IFO]] containing all the metadata about the entire DVD.  Or as I often call it, IFO zero. 
 + 
 +Files are a normal IFO file, the first one on the disc, being ''VIDEO_TS.IFO'' and ''VIDEO_TS.BUP''. 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html|Video Manager and Video Title Set IFO file headers]] - data in both VMG and VTS IFOs 
 +  * [[http://stnsoft.com/DVD/ifo_vmg.html|Video Manager IFO]] - data specific **to the one** VMG IFO 
 + 
 + 
 + 
 +==== VMG IFO Contents: libdvdread ==== 
 + 
 +See ''ifoOpenVMGI()'' in ''ifo_read.h''. 
 + 
 +See ''vmgi_mat_t'' struct in ''ifo_types.h''. 
 + 
 + 
 +<code> 
 +ifo_handle_t *ifo_zero; 
 +ifo_zero = ifoOpen(dvdread_dvd, 0); 
 +</code> 
 + 
 +** VMG ID ** 
 + 
 +  * Example: DVDVIDEO-VMG 
 + 
 +<code> 
 +char *id; 
 +id = ifo_zero->vmgi_mat->vmg_identifier; 
 +</code> 
 + 
 +** Last sector of VMG set ** 
 + 
 +The last sector of the BUP. 
 + 
 +<code> 
 +uint32t i; 
 +i = ifo_zero->vmgi_mat->vmg_last_sector; 
 +</code> 
 + 
 +** Last sector of IFO ** 
 + 
 +Current IFO?  Not sure... 
 + 
 +<code> 
 +uint32t i; 
 +i = ifo_zero->vmgi_mat->vmgi_last_sector; 
 +</code> 
 + 
 +** Version number ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html#ver]] 
 + 
 +<code> 
 +uint8t i; 
 +i = ifo_zero->vmgi_mat->specification_version; 
 +</code> 
 + 
 +** VMG category ** 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmg_category; 
 +</code> 
 + 
 +** Number of volumes ** 
 + 
 +Not sure if I've seen this one yet, where it is positvely set (todo: search IFOs).  It's the number of volumes for an entire set of the DVDs that this one is a part of a collection. 
 + 
 +<code> 
 +uint16_t i; 
 +i = ifo_zero->vmgi_mat->vmg_nr_of_volumes 
 +</code> 
 + 
 +** Volume number ** 
 + 
 +<code> 
 +uint16_t i; 
 +i = ifo_zero->vmgi_mat->vmg_this_volume_nr; 
 +</code> 
 + 
 +** Disc side ** 
 + 
 +This should obviously be a 1 or a 2. 
 + 
 +<code> 
 +uint8t i; 
 +i = ifo_zero->vmgi_mat->disc_side; 
 +</code> 
 + 
 +** Number of title sets ** 
 + 
 +Number of VTSs, aka IFOs.  **For debugging**, this number should match the actual amount of IFOs on a DVD. 
 + 
 +<code> 
 +uint16_t i; 
 +i = ifo_zero->vmgi_mat->vmg_nr_of_title_sets; 
 +</code> 
 + 
 +** Provider ID ** 
 + 
 +Example: ''DEFENDERS_OF_THE_EARTH_V2D2A''.  Often blank.  32 characters not including a NULL terminator. 
 + 
 +<code> 
 +char *id; 
 +id = ifo_zero->vmgi_mat->provider_identifier; 
 +</code> 
 + 
 +** VMG POS ** 
 + 
 +Dunno what this one is.  8-bytes. 
 + 
 +<code> 
 +uint64_t i; 
 +i = ifo_zero->vmgi_mat->vmg_pos_code; 
 +</code> 
 + 
 +** Last byte of VMG IFO (IFO Zero) ** 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmgi_last_byte; 
 +</code> 
 + 
 +** Start address of first PGC ** 
 + 
 +First Play program chain. 
 + 
 +  * [[http://stnsoft.com/DVD/pgc.html]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->first_play_pgc; 
 +</code> 
 + 
 +** Start sector of menu VOB ** 
 + 
 +Dunno what this is yet. 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmgm_vobs; 
 +</code> 
 + 
 +** Sector pointer to TT_SRPT, table of titles ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo_vmg.html#tt]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->tt_srpt; 
 +</code> 
 + 
 +** Sector pointer to Menu Program Chain Table (VMGM_PGCI_UT) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo_vmg.html#pgciut]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmgm_pgci_ut; 
 +</code> 
 + 
 +** Sector pointer to Parental Management masks (VMG_PTL_MAIT) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo_vmg.html#mait]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->ptl_mait; 
 +</code> 
 + 
 +** Sector pointer to copies of VTS audio/sub-picture attributes (VMG_VTS_ATRT) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo_vmg.html#atrt]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vts_atrt; 
 +</code> 
 + 
 +** Sector pointer to VMG_TXTDT_MG ** 
 + 
 +Text data.  No idea what this one is. 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->txtdt_mgi; 
 +</code> 
 + 
 +** Sector pointer to menu cell address table (VMGM_C_ADT) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html#c_adt]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmgm_c_adt; 
 +</code> 
 + 
 +** Sector pointer to menu VOBU address map (VMGM_VOBU_ADMAP) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html#vam]] 
 + 
 +<code> 
 +uint32_t i; 
 +i = ifo_zero->vmgi_mat->vmgm_vobu_admap; 
 +</code> 
 + 
 +** Video attributes of menu VOBs (VMGM_VOBS) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html#vidatt]] 
 + 
 +<code> 
 +video_attr_t *a; 
 +a = ifo_zero->vmgi_mat->vmgm_video_attr; 
 +</code> 
 + 
 +** Number of audio streams in menu VOBs (VMGM_VOBS) ** 
 + 
 +Should be 0 or 1 (**debugging checks**). 
 + 
 +<code> 
 +uint8_t i; 
 +i = ifo_zero->vmgi_mat->nr_of_vmgm_audio_streams; 
 +</code> 
 + 
 +** Audio attributes of menu VOBs (VMGM_VOBS) ** 
 + 
 +  * [[http://stnsoft.com/DVD/ifo.html#maudatt]] 
 + 
 +For //channels// the most common integer value (from my findings) is 0 or 1.  Need to find out if that means integer + 1 (so, 0 = mono, 1 = stereo) or what. 
 + 
 +<code> 
 +audio_attr_t *a; 
 +a = ifo_zero->vmgi_mat->vmgm_audio_attr; 
 +</code> 
 + 
 +** Number of subpicture streams in menu VOBs (VMGM_VOBS) ** 
 + 
 +Should be 0 or 1 (**debugging checks**). 
 + 
 +<code> 
 +uint8_t i; 
 +i = ifo_zero->vmgi_mat->nr_of_vmgm_subp_streams; 
 +</code> 
 + 
 +** Subpicture attributes of menu VOBs (VMGM_VOBS) ** 
 + 
 +<code> 
 +subp_attr_t *a; 
 +a = ifo_zero->vmgi_mat->vmgm_subp_attr; 
 +</code>

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