Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• Is it possible to convert m2ts with Dolby Vision into mp4 ?

  24 août 2018, par Godmax

  Is it possible to convert a m2ts with dual layer Dolby Vision information into an MP4 without any loss of the information?

• ffmpeg Error extracting one frame

  24 août 2018, par Efrem Blazquez

  I need to extract a frame from a video to generate a thumbnail, and I'm using the next call to ffmpeg:

  ffmpeg -i /projectes/macba/TEMP/video_test/DIG_A-HIS-04943_001_h.mov -r 1 -ss 00:00:59 -t 120:-1 test.jpg
  

  and it results in a [buffer @ 0x174efe0] Buffering several frames is not supported. Please consume all available frames before adding a new one.

  And doesn't generates the image, I'm not very used to use ffmpeg and I'm having trubbles to spot the problem.

  Using ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2

  Any hints?

  Thanks!

• Creating own video server with ffserver/ffmpeg streaming RTSP

  24 août 2018, par Brykyz

  I have created app that plays video when url is provided. It can recieve video via RTSP (already tried to play famous big bunny), but now I want to debug it with my own server. Currently I have downloaded ffserver/ffmpeg and want to create my own video server, but i don't know how.

  I have already tried

  ffserver &
  sudo ffmpeg -r 24 -i "video.mp4" http://localhost:8090/feed1.ffm
  ffplay http://localhost:8090/feed1.ffm
  

  but it doesn't work. I am trying to achieve same thing that happens when I type to terminal

  ffplay rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov
  

  (it should play my video), but I want to use private server.

  How can I create server that will stream video via RTSP?

  Thank you for your help!

  //Edit:

  ffserver.conf

  HttpPort 8090 
  RtspPort 5554
  HttpBindAddress 0.0.0.0 
  MaxClients 1000 
  MaxBandwidth 10000 
  NoDaemon 
  
   
  File /tmp/feed1.ffm 
  FileMaxSize 1000M 
   
  
  
  Feed feed1.ffm
  Format rtp
  VideoCodec mpeg4
  VideoFrameRate 25
  VideoBufferSize 80000
  VideoBitRate 100
  VideoQMin 1
  VideoQMax 5
  VideoSize 1920x1080
  PreRoll 0
  Noaudio
  
  

  and I am trying to launch it via

  ffserver -d & ffmpeg -re -i "simpsons.mp4" http://localhost:8090/feed1.ffm
  

  and then ffplay "rtsp://localhost:5554/test.mpeg4" Output is

  [tcp @ 0x7fb0880079c0] Connection to tcp://localhost:5554?timeout=0 failed: Connection refused
  rtsp://localhost:5554/test.mpeg4: Connection refused
  

• How send only video to bitstream filter trough tee option

  24 août 2018, par Benji Joa

  I want to encode video in mpeg4 format and get two output of it, one in h264 format(without sound) and the other in mpeg4-ts format. I don't find the option for enable sound in the first output. Here my command line:

  ./ffmpeg -i input -map 0 -c:a aac -c:v libx264  -y -f tee "[f=h264:bsfs/v=bitstreamfilter1]out.264|[f=mpegts:bsfs/v=bitstreamfilter2]out.ts"
  

  Thanks you

• org.bytedeco.javacv.CanvasFrame showImage is hanging

  24 août 2018, par user3911119

  An IOS device is uploading h264 files (3 sec videos) to a server. Each file is successfully readable by VLC.

  Using FFMpegFrameGrabber, I grab each frame and try to display them using CanvasFrame.showImage as below. However, the method call hangs.

  CanvasFrame canvas = new CanvasFrame("ios");
  canvas.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  canvas.setAlwaysOnTop(true);
  canvas.setResizable(true);
  try(FileInputStream fis = new FileInputStream(file))
  {
      try(FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(fis))
      {
          grabber.setFormat("h264");
          grabber.start();
          while(true)
          {
              Frame frame = grabber.grabImage();
              if(frame != null)
              {
                  canvas.showImage(frame);
              }
          }
      }
  }
  

  Am I doing anything wrong in the above code?

  EDIT#1: When I try to save the buffered image for the frame, a valid image is saved.

  BufferedImage image = converter.getBufferedImage(frame);
  File outputfile = new File("png_file");
  ImageIO.write(image, "png", outputfile);