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• FFMPEG retrieve time duration not working for MOV files

  1er avril 2015, par Calvin Moss

  So I am in php running an ffprobe command on files and grabbing the output (to get duration, time, etc)

  exec("usr/bin/ffprobe -v quiet-print_format json -show_format -show_streams $location", $output, $exitCode); 
  

  Where $location is the files location + filename. Now this command works 100% perfectly for .mp4 / .avi / everything else I have tried. Except .mov, when using .mov my "output" variable is empty. Is there any way to fix this / change this?

• rotate Frame in JavaCV

  1er avril 2015, par Vahagn

  I write simple app for android whick use FFmpeg + JavaCV. I can capture image from camera and can recorde video. But want to rotate frame when record video, don't can :-(

  Please see image

  Stop and save code:

  public void stopRecording() {
  
          runAudioThread = false;
          try {
              audioThread.join();
          } catch (InterruptedException e) {
              e.printStackTrace();
          }
          audioRecordRunnable = null;
          audioThread = null;
  
  
          if (recorder != null && recording) {
              if (RECORD_LENGTH > 0) {
                  Log.v(LOG_TAG,"Writing frames");
                  try {
                      int firstIndex = imagesIndex % samples.length;
                      int lastIndex = (imagesIndex - 1) % images.length;
                      if (imagesIndex <= images.length) {
                          firstIndex = 0;
                          lastIndex = imagesIndex - 1;
                      }
                      if ((startTime = timestamps[lastIndex] - RECORD_LENGTH * 1000000L) < 0) {
                          startTime = 0;
                      }
                      if (lastIndex < firstIndex) {
                          lastIndex += images.length;
                      }
                      for (int i = firstIndex; i <= lastIndex; i++) {
                          long t = timestamps[i % timestamps.length] - startTime;
                          if (t >= 0) {
                              if (t > recorder.getTimestamp()) {
                                  recorder.setTimestamp(t);
                              }
                              recorder.record(images[i % images.length]);
                          }
                      }
  
                      firstIndex = samplesIndex % samples.length;
                      lastIndex = (samplesIndex - 1) % samples.length;
                      if (samplesIndex <= samples.length) {
                          firstIndex = 0;
                          lastIndex = samplesIndex - 1;
                      }
                      if (lastIndex < firstIndex) {
                          lastIndex += samples.length;
                      }
                      for (int i = firstIndex; i <= lastIndex; i++) {
                          recorder.recordSamples(samples[i % samples.length]);
                      }
                  } catch (FFmpegFrameRecorder.Exception e) {
                      Log.v(LOG_TAG,e.getMessage());
                      e.printStackTrace();
                  }
              }
  
              recording = false;
              Log.v(LOG_TAG,"Finishing recording, calling stop and release on recorder");
              try {
                  recorder.stop();
                  recorder.release();
              } catch (FFmpegFrameRecorder.Exception e) {
                  e.printStackTrace();
              }
              recorder = null;
  
          }
      }
  

  in step recorder.record(images[i % images.length]); need rotate frame (images parameter)

  How can help me ? Thank you.

• Muxing in audio to gstreamer RTMP stream kills both video and Audio

  1er avril 2015, par Adam

  I need some genius help here - I'm trying to set up a live stream for my upcoming wedding... and I have it ALMOST working - audio seems to be the problem.

  This is my setup

  • Raspberry Pi Model B+
  • Logitech C920 (with onboard h264 encoding that I am utilising)
  • on-camera (C920) microphone
  • USB wifi to iPhone 4G connection
  • gstreamer1.0
  • Amazon EC2 Wowza RTMP server

  I have it all set up, but as soon as I mux in the audio, the streams wont play by any player.

  What Works: - my gstreamer pipeline WITHOUT the audio muxed in - Wowza receives a consistent stream, no failures - The various Flash players / iOS / Android and VLC all play back the video

  What doesnt: - enabling audio in the mux (using the pipeline below) - BUT gstreamer doesnt complain - BUT Wowza receives a consistent stream, no failures - The various flash players fail to play both Audio and Video. some just display the first video frame - VLC plays 1 video frame, and about 100ms of audio, then stops

  Ideally I'd like the muxed audio/video FLV stored on the SD card too in case the network goes down - but if the 'tee' needs to be sacrificed to make it work, so be it.

  This is my current FAILING pipeline - I assume there's something really stupid in it because I know practically nothing about gstreamer.... The first frame loads in all the players (except iOS.. which never shows anything)

  # set camera resolution to 720p, and the data format to H264 (alternatives are YUV and JPG)
  v4l2-ctl --device=/dev/video0 --set-fmt-video=width=1280,height=720,pixelformat=1
  # set the frame rate
  v4l2-ctl --device=/dev/video0 --set-parm=10
  
  gst-launch-1.0 -v -e uvch264src initial-bitrate=300000 average-bitrate=300000 device=/dev/video0 name=src auto-start=true src.vidsrc \
                  ! queue \
                  ! video/x-h264,width=1280,height=720,framerate=10/1 \
                  ! h264parse \
                  ! flvmux streamable=true name=mux \
                  ! queue \
                  ! tee name=t \
                  ! queue \
                  ! filesink location=/home/pi/wedding.flv t. \
                  ! queue \
                  ! rtmpsink location='rtmp://wowzaserver/live/wedding live=1' >>/home/pi/wedding.log 2>&1
  

  Some of the things I can't really afford to change at this late stage are the encapsulation (FLV) and wowza RTMP because I've built everything around that...

  Please Help!! Thanks!

  UPDATE

  Given that I am also saving the FLV file, I have found that if I use ffmpeg to send that FLV file (using audio copy, video copy) to the RTMP server, everything works (but obviously its not live)! So I am now starting to believe this is a problem with the way Gstreamer encapsulates RTMP - and by putting ffmpeg in the middle it fixes it... but it's not live of course. Is it possible to pipe my output to ffmpeg and using ffmpeg's RTMP?

• Minimum of 10 fps with FFmpeg and libvp9

  1er avril 2015, par Richy321

  I'm encoding a video with ffmpeg and the vp9 encoder (using the image2pipe function) using the following command line called through C#:

  ffmpeg.exe" -r 5 -f image2pipe -i pipe:.bmp -vcodec libvpx -b:v 2M -crf 10 -qmin 4 -qmax 40 -threads 8 -slices 8 "fpsTest.avi"

  If I set the fps below 10 (using the -r parameter) all I get is a repeat of the first frame for the whole duration of the video. If I set the fps above 10 and above everything works correctly.

  Any ideas?

• Encoding a live stream of bitmaps using FFMPEG

  1er avril 2015, par user3088260

  I've got a constant stream of jpeg's that need to be converted to a video (of any kind).
  The problem is that the stream is virtually infinite and I don't know any method of creating videos using pictures that doesn't store the whole file in memory until the stream stops..

  Is there a way that I can feed FFMPEG with bitmaps or jpegs constantly from c# or at least make ffmpeg read images from a folder with +432000 images (on the command line)?

  Please note that there will be no sound, the images will be low quality, they will come at a rate ~5 FPS and this will run on a high-ish end laptop. BTW I can provide code but I assume this is unnecessary at the moment as I am only creating bitmaps and saving them.