kaffeine-devel

[kaffeine-devel] vlc-part

[deb <the...@fr...>]

Hello,

I would like to create a VLC interface. But I would like to start with 
kaffeine 0.8.8 because I'm quite scared by KDE4.
I've integrated the source in Kdevelop and umbrello.
Are there some tech docs somewhere ?
What are your suggestions ?

Regards,
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

Hi,

2010/8/8 deb <the...@fr...>:
> Hello,
>
> I would like to create a VLC interface. But I would like to start with
> kaffeine 0.8.8 because I'm quite scared by KDE4.

Kaffeine 0.8.8 isn't compatible to 1.0, so this isn't a good idea. Why
are you scared? You don't need to use the KDE desktop environment for
developing or using kaffeine, you just need the base libraries.

> I've integrated the source in Kdevelop and umbrello.

I guess I'm one of the last people out in the world using a text editor :-)

> Are there some tech docs somewhere ?

Tech docs about kaffeine? Not really ...

> What are your suggestions ?

Very quick: Take a look at src/backend-xine/xinemediawidget.h (version
1.0). There you see +/- the features that are used; make all the
functions empty (= stubs), then hack around and successively try to
implement those functions with libvlc ...

> Regards,
> Fabien

Hope this (short) answer helps for the moment, if you have further
questions just ask.

Christoph

Re: [kaffeine-devel] vlc-part

[deb <the...@fr...>]

Hi,

On 08/10/2010 10:15 PM, Christoph Pfister wrote:
> Hi,
>
> 2010/8/8 deb<the...@fr...>:
>
> Kaffeine 0.8.8 isn't compatible to 1.0, so this isn't a good idea. Why
> are you scared? You don't need to use the KDE desktop environment for
> developing or using kaffeine, you just need the base libraries.
Good. But the interface in the release 1.0 is far from the release 0.8.
I don't really want to deal with the GUI.
>
>
> I guess I'm one of the last people out in the world using a text editor :-)
I'm also used to develop only nedit. But Kdevelop is practical to walk 
through the code.
>
>
>> What are your suggestions ?
>
> Very quick: Take a look at src/backend-xine/xinemediawidget.h (version
> 1.0). There you see +/- the features that are used; make all the
> functions empty (= stubs), then hack around and successively try to
> implement those functions with libvlc ...
>
I think I will use libvlc_media_player.h and libvlc_media.h that make 
things easy. I'm now trying to understand how to integrate these 
functions in the GUI.

-
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

2010/8/11 deb <the...@fr...>:
> Hi,
>
> On 08/10/2010 10:15 PM, Christoph Pfister wrote:
>> Hi,
>>
>> 2010/8/8 deb<the...@fr...>:
>>
>> Kaffeine 0.8.8 isn't compatible to 1.0, so this isn't a good idea. Why
>> are you scared? You don't need to use the KDE desktop environment for
>> developing or using kaffeine, you just need the base libraries.
> Good. But the interface in the release 1.0 is far from the release 0.8.
> I don't really want to deal with the GUI.

You don't have to care about the user interface. The player backend is
really about playback.

>> I guess I'm one of the last people out in the world using a text editor :-)
> I'm also used to develop only nedit. But Kdevelop is practical to walk
> through the code.
>>
>>
>>> What are your suggestions ?
>>
>> Very quick: Take a look at src/backend-xine/xinemediawidget.h (version
>> 1.0). There you see +/- the features that are used; make all the
>> functions empty (= stubs), then hack around and successively try to
>> implement those functions with libvlc ...
>>
> I think I will use libvlc_media_player.h and libvlc_media.h that make
> things easy. I'm now trying to understand how to integrate these
> functions in the GUI.

You somehow need to integrate libvlc with QWidget (passing the winId,
likely you also have to tell libvlc about resizings and repaintings).

> -
> Fabien

Christoph

Re: [kaffeine-devel] vlc-part

[deb <the...@fr...>]

On 08/11/2010 09:39 PM, Christoph Pfister wrote:
> You don't have to care about the user interface. The player backend is
> really about playback.
Ok, I had a look on the release 1.0 and the design seems better compared 
to 0.8. I'll try to create a vlc backend.

Thanks again,
Fabien

Re: [kaffeine-devel] vlc-part

[deb <the...@fr...>]

Hello Christoph,

I could not import all kaffeine-1.0 headers in umbrello, so I can't see 
all interactions between the classes.
I have 2 questions.
1) I wanted to modify the CMakelist.txt file to add a reference to VLC 
using find_package(...) but cmake complained because it could find a 
cmake file for VLC. How is it handled for xine ?
2) The xine commands are written to a file. Are they command lines ?

Thanks in advance,
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

2010/8/20 deb <the...@fr...>:
> Hello Christoph,
>
> I could not import all kaffeine-1.0 headers in umbrello, so I can't see
> all interactions between the classes.

Hmm ...

> I have 2 questions.
> 1) I wanted to modify the CMakelist.txt file to add a reference to VLC
> using find_package(...) but cmake complained because it could find a
> cmake file for VLC. How is it handled for xine ?

There is a FindXine.cmake "module" shipped with kdelibs. For now you
can use a quick and dirty way (add the name of the vlc library to
target_link_libraries() - be aware that adding FOO means linking
against "libFOO.so").

> 2) The xine commands are written to a file. Are they command lines ?

No. The kaffeine process launches a second process (kaffeine-xbu),
which interacts with the xine library, and they communicate via pipes
(man 2 pipe). In your case, you don't need a second process, you will
call the desired vlc functions directly.

> Thanks in advance,
> Fabien

Christoph

Re: [kaffeine-devel] vlc-part

[deb <the...@fr...>]

On 08/22/2010 03:12 AM, Andrius da Costa Ribas wrote:
> deb: make sure you have FindLIBVLC.cmake on your cmake modules path... (not
> sure where it is on linux... on windows it is share\apps\cmake\modules ) I
The path is /usr/share/kde4/apps/cmake/modules for FindXine.cmake but 
there is nothing for VLC. I have to create it.

-
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

2010/8/23 deb <the...@fr...>:
> On 08/22/2010 03:12 AM, Andrius da Costa Ribas wrote:
>> deb: make sure you have FindLIBVLC.cmake on your cmake modules path... (not
>> sure where it is on linux... on windows it is share\apps\cmake\modules ) I
> The path is /usr/share/kde4/apps/cmake/modules for FindXine.cmake but
> there is nothing for VLC. I have to create it.
>
> -
> Fabien

Any progress?

Christoph

Re: [kaffeine-devel] vlc-part

[deb <the...@fr...>]

On 09/18/2010 08:52 PM, Christoph Pfister wrote:
> Any progress?
> 
> Christoph
> 
> 
The configuration step is Ok. But I have no time to work on it anymore.
I'll see later if I can.

-
Fabien

Re: [kaffeine-devel] vlc-part

[usual <the...@fr...>]

On 20/09/2010 09:53, deb wrote:
> On 09/18/2010 08:52 PM, Christoph Pfister wrote:
>> Any progress?
>>
>> Christoph
Hi Christoph,

I saw that the vlc-backend is implemented in the GIT repository :-).
I compiled it against libvlc-2.0.
What's your next move ?
I would like to help even if I'm not a vlc expert. I'm diving into it ...

-
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

Hi,

There are basically three main things to do at the moment:
- make the vlc backend fully usable (dvd menus, hw accel, ...)
- support new delivery systems (dvb-t2, ...)
- separate ui / non-ui stuff in the dvb code

On the backend side, some things got broken, so the procedure is to
find out what (vcd, dvd, external subtitles, ... ?) + how to fix it
:-)

Regards,

Christoph


Am 11. März 2012 17:44 schrieb usual <the...@fr...>:
> On 20/09/2010 09:53, deb wrote:
>> On 09/18/2010 08:52 PM, Christoph Pfister wrote:
>>> Any progress?
>>>
>>> Christoph
> Hi Christoph,
>
> I saw that the vlc-backend is implemented in the GIT repository :-).
> I compiled it against libvlc-2.0.
> What's your next move ?
> I would like to help even if I'm not a vlc expert. I'm diving into it ...
>
> -
> Fabien
>
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Re: [kaffeine-devel] vlc-part

[usual <the...@fr...>]

Hi,
On 17/03/2012 15:22, Christoph Pfister wrote:
> Hi,
>
> There are basically three main things to do at the moment:
> - make the vlc backend fully usable (dvd menus, hw accel, ...)
I noticed that the DVD menu is not enabled if I play an iso file.
> - support new delivery systems (dvb-t2, ...)
> - separate ui / non-ui stuff in the dvb code
I'm not ready for that yet.
> On the backend side, some things got broken, so the procedure is to
> find out what (vcd, dvd, external subtitles, ... ?) + how to fix it
> :-)
I tried to implement the DVB-T. I saw that a m2t file is created but 
remained empty :-(
I'm not sure how VLC handles this.
"vlc -p dvb --advanced" shows the option list to play a channel.
For instance, a command like "vlc dvb:// --dvb-adapter 0 --dvb-frequency 
586166 --dvb-inversion -1 --dvb-bandwidth 8 --dvb-transmission 8 
--dvb-guard 1/8..." plays a channel.
Can I have these info from MediaSource before calling this function ?
void VlcMediaWidget::play(const MediaSource &source)

Regards,
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

Am 18. März 2012 19:37 schrieb usual <the...@fr...>:
<snip>
> I tried to implement the DVB-T. I saw that a m2t file is created but
> remained empty :-(
> I'm not sure how VLC handles this.
> "vlc -p dvb --advanced" shows the option list to play a channel.
> For instance, a command like "vlc dvb:// --dvb-adapter 0 --dvb-frequency
> 586166 --dvb-inversion -1 --dvb-bandwidth 8 --dvb-transmission 8
> --dvb-guard 1/8..." plays a channel.
> Can I have these info from MediaSource before calling this function ?
> void VlcMediaWidget::play(const MediaSource &source)

Kaffeine writes data to ~/.kde/share/apps/kaffeine/dvbpipe.m2t, vlc
reads that pipe (it's a pipe, not a regular file). This has nothing to
do with vlc dvb://.

> Regards,
> Fabien

Christoph

Re: [kaffeine-devel] vlc-part

[deb-account <the...@fr...>]

On 18/03/12 19:49, Christoph Pfister wrote:
>
> Kaffeine writes data to ~/.kde/share/apps/kaffeine/dvbpipe.m2t, vlc
> reads that pipe (it's a pipe, not a regular file). This has nothing to
> do with vlc dvb://.
Ok, I'll try to debug to see why the screen remains black in that case.

Thanks,
Fabien

Re: [kaffeine-devel] vlc-part

[deb-account <the...@fr...>]

On 17/03/12 15:22, Christoph Pfister wrote:
> Hi,
>
> There are basically three main things to do at the moment:
> - make the vlc backend fully usable (dvd menus, hw accel, ...)
>   
I saw that libvlc supports hardware acceleration via the option ffmpeg-hw.
I could not test it because I have not the relevant libva video driver.
> - support new delivery systems (dvb-t2, ...)
>   
Based on linux-dvb, dvb-t2 support seems doable.
I have no way to test it without a T2 network...

-
Fabien

Re: [kaffeine-devel] vlc-part

[usual <the...@fr...>]

On 19/03/2012 10:22, deb-account wrote:
> On 18/03/12 19:49, Christoph Pfister wrote:
>> Kaffeine writes data to ~/.kde/share/apps/kaffeine/dvbpipe.m2t, vlc
>> reads that pipe (it's a pipe, not a regular file). This has nothing to
>> do with vlc dvb://.
> Ok, I'll try to debug to see why the screen remains black in that case.
>
Christoph,

I found the problem. The device remained in Idle state.
I had to register the event libvlc_MediaPlayerBuffering during the VLC 
initialization and handle it.
Now, DVB is active again :-)

-
Fabien

Re: [kaffeine-devel] vlc-part

[Christoph P. <chr...@gm...>]

2012/3/25 usual <the...@fr...>:
> On 19/03/2012 10:22, deb-account wrote:
>> On 18/03/12 19:49, Christoph Pfister wrote:
>>> Kaffeine writes data to ~/.kde/share/apps/kaffeine/dvbpipe.m2t, vlc
>>> reads that pipe (it's a pipe, not a regular file). This has nothing to
>>> do with vlc dvb://.
>> Ok, I'll try to debug to see why the screen remains black in that case.
>>
> Christoph,
>
> I found the problem. The device remained in Idle state.
> I had to register the event libvlc_MediaPlayerBuffering during the VLC
> initialization and handle it.
> Now, DVB is active again :-)

I played a bit with the code and the problem is:

- libvlc_media_player_play() succeeds
- libvlc_media_player_get_state() returns libvlc_NothingSpecial
=> MediaWidget thinks dvb playback has finished

Will think about a proper solution ...

> -
> Fabien

Christoph