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• Revision ea8aaf15b5 : create super fast rtc mode This patch only works if the video is a width and he

  29 janvier 2014, par Jim Bankoski

  Changed Paths :
   Modify /test/svc_test.cc

  
   Modify /vp9/common/vp9_onyx.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodemb.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_pickmode.c

  
   Modify /vp9/encoder/vp9_pickmode.h

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/vp9_cx_iface.c

  
  
  create super fast rtc mode

  This patch only works if the video is a width and height that are both
  a multiple of 32.. It sets every partition to 16x16, and does INTRADC
  only on the first frame and ZEROMV on every other frame. It always does
  does the largest possible transform, and loop filter level is set to 4.

  Was 20% faster than speed -5 of vp8

  Now 20% slower but adds motion search ( every block ), nearest, near
  and zeromv

  The SVC test was changed because - while this realtime mode produces
  bad quality albeit quickly, it isn't obeying all the rules it should
  about which frames are available.

  Change-Id : I235c0b22573957986d41497dfb84568ec1dec8c7

• mp4 video converted using ffmpeg works on safari 8 but wont play on safari

  12 janvier 2016, par Pratik Pawar

  The website I am working on has a video upload and play functionality which works like this :

  1) Upload a video of any format it will converted to .mp4 format video using ffmpeg with following command

  "ffmpeg -i <sourcerawpath> -c:v libx264 -profile:v baseline -level 3.0    <destfullpath>
  
  </destfullpath></sourcerawpath>

  2) When I try to play these videos from website it works just fine on chrome and safari 8 but when i try to play these videos on safari 9 it show blank screen with following error in browsing console

  Failed to load resource : Plug-in handled load

  Earlier the mp4 video would not even play on safari 8 but when we added -profile:v baseline -level 3.0 to ffmpeg command now it works fine. We could not find solution for safari 9.

  From java we are sending this response :

  return Response.ok(video, "video/mp4").header("Aceept-Ranges", "bytes").cacheControl(cc).build();

  video --> video file to be served.

  Can anyone tell me what is the issue in this case ?

• MJPEG Stream works in Firefox but not in Chrome

  11 décembre 2019, par Maoration

  We have a system that contains cameras and we want to stream them to multiple clients.
  Behind the scenes on the server we get connections from cameras, we keep everything related to that camera in a CameraContainer, which also includes a mpegtsToMjpegStream that extends Duplex (both Readable and Writable Stream).

  after a camera connects, we open an ffmpeg process to work on the incoming mpegts stream, and output an MJPEG stream :

        '-map', '0:v', '-c:v', 'mjpeg','-f', 'mjpeg', `-`,

  ** we are doing this because we are also mapping to other outputs, like writing files.

  ---

  On the ’serving’ side, we are currently testing a simple API to GET an mjpeg stream with a camera id :

    async getCameraStream(@Param('cameraId') cameraId: string, @Res() res): Promise<any> {
  
  const cameraContainer = this.cameraBridgeService.getCameraContainer(cameraId);
  
  if (!cameraContainer) {
  
    throw new Error(`Camera with id: ${cameraId} was not found`);
  
  }
  
  
  
  if (!cameraContainer.mpegtsToMjpegStream) {
  
    throw new Error('ERROR: mpegtsToMjpegStream stream does not exist on this camera container');
  
  }
  
  
  
  const writable = new Writable({
  
    write: (chunk, encoding, callback) => {
  
      res.write(`Content-Type: image/jpeg\r\nContent-Length: ${chunk.length}\r\n\r\n`);
  
      res.write(chunk);
  
      res.write('\r\n--ffmpeg_streamer\r\n');
  
      callback();
  
    },
  
  });
  
  
  
  res.set('Content-Type', 'multipart/x-mixed-replace;boundary=ffmpeg_streamer');
  
  res.write('--ffmpeg_streamer\r\n');
  
  
  
  cameraContainer.mpegtsToMjpegStream.pipe(writable, { end: false });
  
  
  
  res.once('close', () => {
  
    if (cameraContainer.mpegtsToMjpegStream &amp;&amp; writable) {
  
      cameraContainer.mpegtsToMjpegStream.unpipe(writable);
  
    }
  
    res.destroy();
  
  });
  
  </any>

  ---

  The problem is this code works very nicely when accessing the stream with Firefox- after 1-2 seconds we get a stable, high quality, low latency stream.
  With Chrome however, the same code does not behave- the video output is corrupted, disappears into a black screen all the time, and we have to keep refreshing the page constantly just to view a few seconds of the stream until it disappears again.

  Any suggestions as to why this happens and how can I fix it ?