[vlc-devel] libvlc_media_instance_stop not implemented, workaround

jboileau jboileau at gmail.com
Fri Dec 14 23:15:13 CET 2007

Hi Pierre,

Thanks for your help! I will test this new build and let you know. I will be
glad to give feedback on my progress with libvlc. For your information I
have listed details of my project below. Monday I will give a spin of
tonights build and if all goes well I will be able to do the test below and
run it for days and see how stable things are. The only thing I haven`t
implemented yet are the playlist but playing the same file in a loop will be
a good enough test. Presently I have a simple test of a 20 second video
running in a loop. It has been running for 3 days straight. No crash or
problem, but the memory seems to grow. This test was done with the build of
2007-11-26. I will let you know how things are with tonights build.

My next step will be to implement a playlist. I am unsure if I want to
implement it in my code or use the libvlc_media_list_... API. My playlist
are simply M3U files. Nothing hard to handle.

   - My test application is playing a movie with the video being played
   locally while the audio (2 channels/languages) is streamed to another IP
   address using UDP/MPEG-TS. I need to use UDP/MPEG-TS to accommodate the
   subsystem I stream to.
   - I use the libvlc_media_instance_...  API so that I can use the
   events API instead of polling a state. I used to use the libvlc_playlist_...
   API but couldn't find a way to get called backed on end of stream.
   - It will also stream 7 music playlists the same way as the audio of
   the movie.
   - All these audio streams are sent to the same IP Address with
   different port numbers
   - I am using libvlc from the trunk so I am actually working with
   - I use --sout-display-delay to synchronize the video with the audio
   for the movie. Unfortunately this has the effect of chopping the equivalent
   of the buffer from the end. I know this is a known bug and I have seen it is
   listed as high priority, but I will try to find a workaround. Maybe using
   one of the other buffering options.
   - I use GetProcAddress to get entry points into the DLL. Dangerous but
   since there is not libvlc-control.lib for Visual Studio, I believe its
   the only way.
   - The development is done for Windows using Visual Studio and MFC
   - I create a CWnd (MFC) and do a libvlc_video_set_parent to have
   libvlc play in my window.
   - This runs on a 650 Mhz Windows XP embedded machine with 256 meg of

Jacques Boileau

On Dec 14, 2007 4:02 PM, Pierre d'Herbemont <pdherbemont at free.fr> wrote:

> Hi Jacques,
> This was a forgotten known issue. I did implement it in r23617.
>  Please continue to report troubles you encounter with LibVLC, I'll be
> happy to help you with that.
>  Thanks!
>  Pierre.
>    On Dec 14, 2007, at 4:17 PM, jboileau wrote:
> This is probably a known issue, but libvlc_media_instance_stop is not
> impleted yet. If this helps anybody, using libvlc_playlist_stop in the
> meantime seems to work. You do get an exception that the playlist is empty
> but the video does stop.
> --
> Jacques Boileau _______________________________________________ vlc-devel
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Jacques Boileau
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