The VideoLAN Forums

I'm using 1.0.1 and trying to implement the zoom/magnify feature.
I used libvlc_video_set_scale()
However, I see no effect and libvlc_video_get_scale() returns 0.0
Is there some sequence of calls or something special I need to add?
The '-vvv' only spits out [0x3ee8e2c] main input debug: control type=1

Could someone please help me out, thanks.

Is the video already active when you call the function? Is the video embedded in the application?

Thank you, Rémi.
Yes, the video is already active & playing.

My app is Java based - I do the usual creating instances followed by: I then call libvlc_video_set_scale() on a button click
Based on your comment, I did try putting the 'scale change' just before 'play' in the above sequence but an exception was raised with msg="I/P is null" so I guess this is not the correct sequence.

My video url is an rtsp stream: rtsp://10.8.0.1:8901/pb0017
My VLC args: :reset-config, :aspect-ratio=720:576, :rtsp-user=admin, :rtsp-pwd=00ulTIyPkHezE, :rtsp-tcp, :no-skip-frame, :no-drop-late-frame, :no-ffmpeg-hurry-up, :ffmpeg-skiploopfilter, 4

Ok, so after hunting around, I added the "--no-autoscale" option.
Now, libvlc_video_get_scale() gives me the correct value - 1.0 [or if I use --scale=2.0 it returns 2.0]
- I then use libvlc_video_set_scale() passing a new float value, libvlc_video_get_scale() then returns 0.0 thereafter
- Also, I don't see the visual effect of scaling.

Any pointers appreciated.
Thanks!