Hi -
On Fri, 15 Oct 2004, William Sherman wrote:
> Thanks for the response Steven. I'm on the digest, so it took me a
> while to test things out and respond to your response.
You're welcome. I was beginning to wonder if you'd seen the posting.
It's a low volume mailing list so if you're in a "hurry" for
a response you might want to switch to the non-digest form.
> You know what, both. I forgot that my original movie I tested with was
> from before upgrading (from the Canopus source). However, even one of the
That would definitely have the bug - the playback using the Quicktime
Player will look like a "slide show" (I think what's happening is
that QT-Player is playing just the I frames and choking until it
gets to the next I frame).
> movies I just made from the IVTV source plays fine for 10 minutes or so,
> but then Quicktime gets jerky, and even when I stop and begin at the
I have a theory about what that might be - nothing certain though...
> I build my own of all that stuff on my Linux box, including kino, and
> this format and that format -- it's an endless operation, getting all
> the video codecs and players to work. And then when I upgrade the
Multiply that by 4 systems and 4 or 5 OSs and you get an idea
what I spend my time doing :)
> > Don't multiplex the files together! DVDSP wants the elementary file ...
>
> Aha, well that explains it. Except, when I tried that with iDVD, it doesn't
> like those files either -- and in it's (difficult to follow) tutorial the
Oh, iDVD is braindead - I gave that one try and bought DVDSP. iDVD
also doesn't offer compressed audio - LPCM only - and I couldn't see
giving up 1.5Mb/s out of the bit budget for audio.
> successfully using DSP I went ahead and tried that -- and I managed to
> author and burn a DVD that works in my settop box! Of course, I'm not
Hurrah!
> default opacity for highlight and select on the buttons seem to be
> entirely transparent, so I can't tell which will be selected when
Oh, you need to get another chapter or two into the tutorial for
that :-)
> I'm thinking of getting one of the PCHDTV broadcast HDTV reciever
> cards before the copy-protection act takes effect. But, I'm too
> busy with getting my basic NCSA material onto DVD.
I'm also thinking of getting one of those. There is a chance the
broadcast flag will be negated but I'm not too hopeful about that.
BUT if you're receiving HDTV signals OTA (Over The Air) then you
could do what I've had success with:
Get a HDTV receiver with IEEE1394 ports and use your Powerbook
to do the recording. I use a Samsung T-165 and the DVHS app
that comes with the Firewire SDK 19 from:
http://developer.apple.com/sdk/
Firewire SDK 19 for Mac OS X
Then to demux (AND correct for damaged/lost packets - and Transport
Streams do have both types of problems!) use Project X:
Project X
http://www.lucike.info/index.htm?http://www.lucike.info/page_projectx.htm
From that you get the .m2v and .ac3 files. Now of course you can't
put HD content on a DVD (1920x1080i or 1280x720p is a more than a
little out of the restricted MPEG-2 profile that DVDs use ;)). That's
where the little sci
> Right, I guess I was used to what dvdauthor expects, and figured other
> DVD authoring tools would want the same.
Actually I've thought, for a while now, that dvdauthor should
accept elementary strings and use the 'libmplex2' routines to do
the muxing as it builds the VOB files - that's how the other
authoring programs I've seen work (Adobe's, Apple's, etc).
> Well, except that for IVTV source material, it's already in a program
> stream (or maybe it's a transport stream, I don't know for sure).
Well, if it's a TS (transport stream) are you using demuxing tools
that know how to deal with error/damaged or missing TS packets? If
not I think you could end up with discontinuities or similar problems
and that could cause QT-Player and/or settop boxes to stutter or
other playback problems.
> So avidemux2 serves also as how I write out separate mpeg-2 video
> and mpeg layer 2 audio.
I use Project X for demuxing and then do minor trim operations within
DVDSP.
> Now, I think it's possible to get separate streams of YUV data and
> even AC-3 audio from the IVTV drivers, but last time I tried that
Even if you could get that the volume of data would be huge
(full frame (640x480) "YUV" 4:2:0 data comes out to about 42GB/hr)
and you'd have to encode it to MPEG-2. Not worth the trouble ;)
> A.Pack is an apple thing right, I did get a warning message about
Uh, yes - it is the Dolby certified/licensed AC3 encoder that comes
WITH DVDSP... Look in /Applications :)
> the mp2 audio files that don't match the DVD spec when I did the
> Build & Burn. But since most DVD players go beyond the spec to
Right - MP2 is only required for non-region 1 DVD players (and AC3
is required for region 1) but I have yet to encounter a player in the
US that will not accept MP2 audio.
> > Import the .m2v and .ac3 files into DVDSP and away you go...
>
> Well, that is encouraging news, thanks for all your help -- which includes
It'll work just fine - in fact tonight I created a DVD with 8 tracks,
13 menus (motion) (and a mix of MPEG-1 and MPEG-2 video all encoded with
mpeg2enc).
Have Fun!
Cheers,
Steven Schultz
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