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• avformat_open_input() error -1330794744 : Could not open input

  22 mai 2014, par Navid

  When I run my code on unix (postproc removed) :

  FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber("https://.../ec769038-22d9-4da9-a7bf-dd4647f97964-353.mp4?__h__=1400667080_dfb4fabf293d258cd501ab4978419392");
  
  IplImage capturedImage = null;
  
  
  
  try {
  
      frameGrabber.start();
  
      long lengthInTime = frameGrabber.getLengthInTime();
  
      long i = 0;
  
      while(i < lengthInTime) {
  
          frameGrabber.setTimestamp(i);
  
          capturedImage = frameGrabber.grab();
  
          // if capturedImage is null ... error
  
          if(capturedImage == null)
  
              break;
  
          LOG.info("frame: " + i + "  " + capturedImage.depth());
  
          i += 10 * 1000 * 1000; // microseconds
  
      }
  
      frameGrabber.stop();
  
      frameGrabber.release();
  
  } catch (Exception e) {
  
      LOG.error(e.getMessage());
  
  }

  I get this error :

  avformat_open_input() error -1330794744: Could not open input "https://.../ec769038-22d9-4da9-a7bf-dd4647f97964-353.mp4?__h__=1400667080_dfb4fabf293d258cd501ab4978419392". (Has setFormat() been called?)

  I am running the program in Red Hat Same code works with local file path.
  I know URL works because the same code (but postproc not excluded) works in Windows.
  I am using Javacv 0.5 both in Red Hat and Windows (that’s the only choice I have at work)

• How to burn in subtitles onto a webm video with ffmpeg ?

  7 mai 2014, par IcanFLY

  I am trying to set up a livestream with ffserver and ffmpeg. The problem is I am using webm, and I need to burn in subtitles, which are located in a mkv. I am not quite sure how to do this, but here is my ffmpeg config (ffstream.sh) that I am using :

  #Livestream script for FFMpeg/FFServer
  
  FPS=24                                          # Stream FPS.
  
  GOP=48                                          # GOP Should be double of FPS.
  
  THREADS=4                                       # How many threads.
  
  DEADLINE=realtime                               # Speed preset, realtime is fastest.
  
  FRAMELAG=16                                     # How many frames to seek ahead (max 25)
  
  QMAX=52                                         # More = less quality.
  
  QMIN=10                                         # Less = more quality.
  
  VBITRATE=1M                                     # Target Bitrate.
  
  BITRATE=3000k                                   # Bitrate.
  
  AUDIBR=48k                                      # Audio Bitrate.
  
  SERVER=<myserver>:8090/feed.ffm                 # Server stream endpoint.
  
  LOGLEVEL=verbose                                # Logging verbosity level.
  
  
  
  for f in $@; do ffmpeg -re -i $f\
  
          -vf subtitles=$f\
  
          -g $GOP -loglevel $LOGLEVEL\
  
          -c:v:0 libvpx  -threads $THREADS -b:v $BITRATE -vb $VBITRATE -bufsize $BITRATE\
  
          -qmax $QMAX -qmin $QMIN -deadline $DEADLINE -lag-in-frames $FRAMELAG\
  
          -c:a libvorbis -b:a $AUDIBR\
  
          "http://$SERVER"
  
  done
  
  </myserver>

  Everything connects fine and I can get audio and video to play, however I cannot seem to get the subtitles to show up. Here is my output (I quit out of it) :

  Stream mapping:
  
    Stream #0:1 -> #0:0 (flac -> libvorbis)
  
    Stream #0:0 -> #0:1 (h264 -> libvpx)
  
  Press [q] to stop, [?] for help
  
  [output stream 0:0 @ 0x1e77dc0] 100 buffers queued in output stream 0:0, something may be wrong.
  
  frame=  232 fps= 23 q=0.0 Lsize=     816kB time=00:00:09.67 bitrate= 690.8kbits/s
  
  video:758kB audio:41kB subtitle:0kB other streams:0kB global headers:3kB muxing overhead: 2.113806%
  
  Input file #0 (<file>.mkv):
  
    Input stream #0:0 (video): 242 packets read (3343775 bytes); 242 frames decoded;
  
    Input stream #0:1 (audio): 118 packets read (391060 bytes); 118 frames decoded (483328 samples);
  
    Input stream #0:2 (audio): 8 packets read (20480 bytes);
  
    Input stream #0:3 (subtitle): 1 packets read (182 bytes);
  
    Input stream #0:4 (subtitle): 1 packets read (52 bytes);
  
    Input stream #0:5 (attachment): 0 packets read (0 bytes);
  
    Total: 370 packets (3755549 bytes) demuxed
  
  Output file #0 (http://<myserver>/feed.ffm):
  
    Output stream #0:0 (audio): 3233 frames encoded (206912 samples); 406 packets muxed (41937 bytes);
  
    Output stream #0:1 (video): 232 frames encoded; 232 packets muxed (776350 bytes);
  
    Total: 638 packets (818287 bytes) muxed
  
  Received signal 2: terminating.
  
  </myserver></file>

  Also here is my ffserver config, not sure if there is something in here stopping the subtitles from showing up :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 10000
  
  CustomLog -
  
  
  
  <feed>
  
      File /path/to/folder/tmp/feed.ffm
  
      FileMaxSize 100M
  
      #Allow localhost
  
      ACL allow 127.0.0.1
  
      ACL allow <myip>
  
      #It might be a good idea to add your stream source here.
  
  </myip></feed>
  
  
  
  
  
  <stream>
  
      Feed feed.ffm
  
      Format webm
  
      VideoSize hd720 #Must be set here, all input files will be scaled to fit.
  
      AVOptionVideo flags +global_header
  
      AVOptionAudio flags +global_header
  
      StartSendOnKey
  
  </stream>
  
  
  
  <stream>
  
      Format status
  
      ACL allow localhost
  
  </stream>
  
  
  
  # Redirect index.html to the appropriate site
  
  <redirect>
  
      URL http://<myserver>
  
  </myserver></redirect>

  Any help on how to do this, would be grateful.

• Song name under video

  2 septembre 2020, par ottpeter

  I'm trying to write the song name under the video with ffmpeg. My mp3 files are running in a loop like this :
-stream_loop -1 -i music.txt
My workaround would be to write an SRT file with timecodes, a script would determine when next song is comming, and I would repeat this, let's say, a 1000 times (time codes adjusted), then I would get song names for a month for example. (this would be done before ffmpeg is started)
Obviously this is not optimal, especially because I can't loop the SRT file as well, because of the timecode. It would be better to do this with a filter complex.

  


  Is there a way to know the name of the mp3 that is currently playing, in ffmpeg ?