Re: DVDPlayback

FROM : Devin Lane
DATE : Sat Jul 08 04:19:10 2006

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_removed> 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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>>>

>>
>>
>>

>