Recherche avancée

Sur d’autres sites (8205)

• How to call ffmpeg with Java - umlauts ?

  15 juillet 2014, par Mese

  I am using the Java ProcessBuilder to call FFmpeg to capture a single window on my screen on Windows 7 using this command :

  ProcessBuilder pb = new ProcessBuilder(
  
    "path\\ffmpeg",
  
    "-f", "gdigrab",
  
    "-i", "title=" + "title of window",
  
    "path\\out.mp4"
  
  );

  With most windows this works fine and I don’t have any problems. But when I try to capture a window with an umlaut (like ÄÖÜ) in its title, I get an error that FFmpeg could not find that window. The same happens when starting FFmpeg using the Windows console.

  Does FFmpeg have a problem using umlauts and is there a way to capture windows with umlauts ?

  Thanks !

• Multiple call to ffmpeg main fails in Android

  27 mars 2016, par fatih orhan

  I have ported ffmpeg library to Android. Using JNI interface, I am able to run ffmpeg commands by giving arguments to ffmpeg’s main method, just like from command line.

  In order to get a specific part of a video, I use this command :

  ffmpeg -i /mnt/sdcard/input_video.mp4 -ss 00:00:12 -t 00:00:10 -an /mnt/sdcard/output_video.mp4

  and it works great. The video is split from 12. seconds to 22. seconds and the video is saved, the method returns normally (as 0).

  However, if I make a second similar call (different start time for example) just after the first one is completed, ffmpeg is not able to process the request and it throws a segmentation fault.

  For the first call, it gives such an info :

  Guessed Channel Layout for Input Stream #0.0 : mono

  and works. But for the second, the message is like this one :

  Guessed Channel Layout for Input Stream #1.0 : mono

  and it doesn’t work. I don’t know if it has something to do with the error.

  The problem, in general, should be related to static global variables (I think) but I could not manage to reset them properly. What might be the solution to make multiple successful calls to the main method of ffmpeg ?

• avfilter/audio : Don't call av_get_channel_layout_nb_channels twice

  17 août 2021, par Andreas Rheinhardt

  avfilter/audio : Don't call av_get_channel_layout_nb_channels twice
  Also makes the assert-string shorter.
  Reviewed-by : Nicolas George <george@nsup.org>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavfilter/audio.c