Re: DVDPlayback
Re: DVDPlayback
- Subject: Re: DVDPlayback
- From: Devin Lane <email@hidden>
- Date: Fri, 7 Jul 2006 22:19:10 -0400
Travis:
Thanks for the PDF, the debugging trick might come in handy. I'll
look at the framework more and see if I can find a way to step frame
by frame, but at the moment I don't see a way to do so.
Thanks,
On 2006/07/07, at 21:58, Travis Siegel wrote:
Yes, that was the document I was talking about. I didn't realize
it was in the graphics hiearchy. My copy was on an ADC mailing
disc, and not in it's proper place in the documentation tree.
However, there is another dvd playback guide you can look at.
Again, I do not know where it lives in apples documentation tree,
but I've included it here as an attachment for you. On page 32, it
talks about attaching a debug library to your application
(obviously this mode doesn't work with the encryption on most discs)
I couldn't find the section I referred to in the previous message
about stepping through dvd discs, frame-by-frame, but it *must* be
possible, since one of the modes supported by the dvd playback
services is still frame.
Anyhow, hope this helps, and thanks for the pointer on having their
cocoa dvd player work from disc. I've already tried correcting the
routines you referred to, but I didn't just give up and make it
always true. I'll try that, and see if it works. I can always add
another check after the fact to ensure it's actually a video_ts
directory name.
<DVDPlaybackGuide.pdf>
On Jul 7, 2006, at 8:55 PM, Devin Lane wrote:
Travis:
In the CocoaDVDPlayer sample, Controller.m, function - (BOOL)
isValidMedia:(NSString *)inPath folder:(FSRef *)fileRefP, I just
returned YES from that method. It's not a very good solution, as
it will try to open anything now, but I was able to get it to open
a VIDEO_TS folder.
WRT this DVD api, are you talking about http://developer.apple.com/
documentation/GraphicsImaging/Reference/DVDPlaybackRef/index.html?
There's a function for setting a video port and device, which I
think I can set to a gworld, but there are also functions for
setting the display id and window number. Are these required to be
set, since a gworld isn't going to have either?
Thanks,
On 2006/07/07, at 20:33, Travis Siegel wrote:
How did you get it to play content from a folder on the hd?
Everytime I try this, it opens the folder, then promptly closes
it again. I've tried preventing this, or opening it myself, but
it doesn't seem to matter what I try, I can't get it to play from
folders other than the root of a disk.
As for your other issues, I'm fairly certain you can do the frame
thing, check the dvd api, it's packed full of things you can do
with the dvd framework, and I believe frame viewing is among them.
On Jul 6, 2006, at 3:34 PM, email@hidden wrote:
cocoa-dev:
While the CocoaDVDPlayer sample works fine for basic playback
of a dvd or
VIDEO_TS folder, it isn't very helpful when trying to go a
little further.
Specifically, I need to be able to have DVDKit draw the video
into a
gworld or other offscreen buffer so that I can draw it in a view
in my
application's window, allowing the window to contain other content.
There's a DVDSetVideoPort(), which I thought I would be able to
pass a
gworld too, but it looks like it needs a display device id as
well, as
though it's trying to force the dvd content to be drawn only in an
onscreen window. Also, since I can't debug the app (quits with
error 45
when run with gdb, I assume this means "licensing prevents
debugging of
dvd apps"), it makes it hard to figure out what's going on.
Furthermore, I'd also like to have more access to the actual
video, such
as to find the number of samples (frame), and the locations of
keyframes.
Has anyone had any luck with this?
Thanks,
Devin Lane
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