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Notes to the source material:
Only DVD compliant files may be used in GFD. There is no
automatic
transcoding for avi, divx...
An introduction 'What is DVD' can be found here: http://www.videohelp.com/dvd
One
remark: GFD (with dvdauthor as authoring engine!) will accept
mpeg streams with typical DVB resolutions (528x576 or 480x480) as well.
But if your stand alone DVD player will also accept them, depends on
your player.
Basically elementary video streams (mpv, m2v, m1v) and elementary audio
streams (mp2, ac3, dts) are recommended, since it is then
guaranteed that these get
multiplexed with correct settings. There are a lot of demultiplex
utilities to be found in the web like ProjectX, pvastrumento, vobedit,
pgcdemux, tmpgenc mpeg tools...
An
overview for demultiplex and
multiplex programs can be found on videohelp: Video
De/Multiplexers
With dvdauthor as authoring engine you may use ready muxed material
also, if it is compatible with
dvdauthor (contains navigation packs and continuous time code!). That
applies e.g. also to VOB files, if these contain only one film (title),
thus if a constant timecode is present. If the (single!) film is
distributed on several VOB files, these can simply be "copied together"
into a large one from the command line (and thereby renamed in mpg).
Example:
copy /b VTS_01_1.VOB + VTS_01_2.VOB + VTS_01_3.VOB
NewFilm.mpg
VOB files are checked for the usual problems:
-- Several titles within the vob file (=SCR moves backwards)
-- No sequence header within the first 10kB of the file (=probably the file is only a part of a vobset)
-- No padding bytes at the end of the file a (=probably the file is only a part of a vobset)
-- Elementary video file (like from ChapEditGFD)
If the time code is not continuous,
dvdauthor will
stop with the error message: ERR: SCR moves backwards,
remultiplex input.
With MuxMan as authoring engine only elementary streams in dvd
compliant resolution (no SVCD or special DVB resolutions!) are
supported. If MuxMan complains about your audio file, you can try
to fix it with delaycut.
Typical 'preprocessing steps' for video data of different 'origin':
(Only a short overview! The topic is quite complex - therefore consult
the relevant forums for problems)
DVB (all the same whether -S, -T or -C) most DVB
recording
programs
supply no DVD conform files, therefore demultiplex (best with ProjectX
or pvastrumento), if necessary cut (Mpeg2Schnitt or Cuttermaran) and
add the resulting elementary Streams (video: mpv/m2v and audio:
mpa/mp2/ac3) in GFD, or multiplex the elementary streams with mplex or
imago and add the resulting MPG file in GFD.
VCD/SVCD (or MVCD/KVCD...): In this format the
audio is encoded
with
44,1 kHz, therefore also here you should demultiplex the file first
(e.g. with TMPGEnc MPEG Tools). The audio file must be transcoded 48
kHz with BeSweet or another audio transcoder. Sometimes you may have
audio/video sync. problems with this approach, this may be fixed by
using an audio offset in Mpeg2Schnitt or Cuttermaran. The resulting
elementary Streams can be inserted in GFD as usual.
AVI (usually DivX in any variant): Must be
reencoded!
Suitable
programs: CCE, TMPGEnc, HC, Quenc, FreeEnc, Avidemux...
A separate processing of video and audio is recommended here also, in
particular if the audio is present as MP3 (VBR) stream (can be examined
with GSpot or AviCodec). During some tests myself, only Avidemux was
able to create a correct multiplexed stream (in Avidemux. there is a
special 'treatment' for VBR audio - furthermore Avidemux uses the same
mplex as GFD, so that a dvdauthor compatible stream incl. navigation
packs is produced). Otherwise save the audio first with VirtualDub or
VirtualDubMod, transcode the audio in MP2 or AC3 (e.g. with BeSweet or
HeadAC3he), encode with TMPGEnc, Quenc... as video only stream (in
TMPGEnc select Stream type: (video only), with QuEnc use the
function KillAudio in the Avisynth script). The resulting elementary
streams (video: mpv/m2v and audio: mp2/ac3) can be
inserted
in GFD as usual.
For all programs mentioned here you may find guides and download links
at http://www.videohelp.com/tools