libvlc_video_get_size

[sherington]

Hi,

I can see from the latest source code (src/control/video.c) that libvlc_video_get_size, and consequently the deprecated get width/height functions that call it, never return video dimensions any more. It seems this was explicitly disabled with a commit log comment "Disable invalid access of internal vout fields.", here http://git.videolan.org/?p=vlc.git;a=co ... e2c51fb468.

I also spotted this ticket http://trac.videolan.org/vlc/ticket/3679.

Is there some other 'correct' way to now query libvlc for the video dimensions, or is it simply not possible at the moment?

Thanks!

[Rémi Denis-Courmont]

In the development version, no. That's not a problem in releases though.

[laszloj]

Hi,

Well, I think it just does not work at all. I am using release 1.1.0 dll-s and calling libvlc_video_get_size function
always returns -1;

Code: Select all

/* Create a media player playing environement */ mp = libvlc_media_player_new_from_media (m); int x; unsigned w,h; x = libvlc_video_get_size(mp,1,&w,&h);

x is always -1. Any comment on this?

jozsef

[Rémi Denis-Courmont]

You're probably requesting the size before the video stream started

[sherington]

1.1.0 definitely works for me.

Thanks, Remi, for the info re development versions.

[d3x0r]

It works for you when? After you're already up? Because it returns the size you passed in setformat

[sherington]

It works for me when I request the size after the video stream started, like Remi said above.

setformat is not relevant in this instance since I don't use it.

[xdenser]

I... Because it returns the size you passed in setformat..

no it returns video size of frames in video
not what you have passed to setformat

[d3x0r]

uhh no, the movie i was playing was 352x240, and it returns 640,480 which is the size I passed to setformat. I know what the documentation says... but that's not what I get back. I guess duing the first frame lock I can get the size, but, again, it's the size of setformat not the original stream source. And I haven't yet tried to setformat after the stream has started... even if I did something complex like during the first lock scheduled an event to stop, resize and start... (schedule an event because calling stop during lock is a deadlock)... think it still wouldn't work - maybe schedule creating a new instance

[Christian88]

I have a another question about libvlc_video_get_size.

I want to render the current frame in my own buffer and therefor i'm using libvlc_video_set_callbacks and libvlc_video_set_format:

Code: Select all

libvlc_video_set_callbacks (m_pMediaPlayer, lock, unlock, display, m_pContext); libvlc_video_set_format (m_pMediaPlayer, "RV32", 1600, 1200, 1600 * 4);

video width and height are hard coded.

But now i want to make my program more flexible about different video sizes.

At the point of calling libvlc_video_set_format the stream still hasn't started.

If i can't get the video size before the stream started,
how can i set the video format (width and height)?

[xdenser]

uhh no...

but for me it returns native video size
may be it depends on decoder used
I've tried with udp streaming and mpeg2/4 streams