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• avcodec : [loongarch] Optimize Hevc_mc_bi with LSX.

  17 février 2022, par Hao Chen

  avcodec : [loongarch] Optimize Hevc_mc_bi with LSX.
  ffmpeg -i 5_h265_1080p_60fps_3Mbps.mkv -f rawvideo -y /dev/null -an
  
  before : 124fps
  
  after : 182fps
  Signed-off-by : Hao Chen <chenhao@loongson.cn>
  
  Reviewed-by : 殷时友 <yinshiyou-hf@loongson.cn>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/loongarch/Makefile
  • [DH] libavcodec/loongarch/hevc_mc_bi_lsx.c
  • [DH] libavcodec/loongarch/hevcdsp_init_loongarch.c
  • [DH] libavcodec/loongarch/hevcdsp_lsx.h

• Truly live streaming to Android/iPhone

  4 juillet 2012, par Tsaukpaetra

  I have spent quite a while (past week) trying this to little avail. However, what I want seems completely unheard of. So far, I have reviewed recommendations available through google, which include encoding a static file into multiple static files in different formats, creating a playlist that hosts static files in an m3u8 file (files which get added to the playlist as streaming continues).
  I have also seen ideas involving rtmp, rtsp etc which are completely out of the question because of their incompatibility.
  Ideally, I would have one webpage that would link to the stream (http://server/video.mp4) and/or show it in a webpage (via the video tag). With that in mind, the most likely format would be h264+aac in mp4 container.

  Unfortunately, (and probably because the file has no duration metadata) it does not work. I can use a desktop player (such as VLC) to open the stream and play it, but my iPhone and Android both give their respective "Can't be played" messages.

  I don't think the problem is caused by the devices' ability to stream, for I have made a streaming shoutcast server work just fine (mp3 only).

  Currently, the closest I have become is using the following setup on my win32 machine :

  FFMPEG Command: : ffmpeg -f dshow -i video="Logitech Webcam 200":audio="Microphone (Webcam 200)" -b:v 180k -bt 240k -vcodec libx264 -tune zerolatency -profile:v baseline -preset ultrafast -r 10 -strict -2 -acodec aac -ac 2 -ar 48000 -ab 32k -f flv "udp ://127.0.0.1:1234"

  VLC: : Stream from udp ://127.0.0.1:1234 to http:// :8080/video.mp4 (No Transcoding), basically just to convert the UDP stream into an http-accessible stream.

  Any hints or suggestions would be warmly welcomed !

• Debugging the canvas texture code in A-Frame (FFmpeg stream as canvas source)

  1er janvier 2018, par MrDiago

  I am attempting to display a canvas as a texture in A-Frame. The canvas image is a video stream fed in from FFmpeg. This feed displays fine on the regular 2d canvas example from https://github.com/sbidolach/video-live-streaming , but I’m just getting a blank browser window when attempting to bring the code for reading FFmpeg to Canvas into the A-frame page structure.

  Please find below my current revision, any help debugging it would be greatly appreciated :

    
  
      <code class="echappe-js">&lt;script src=&quot;https://aframe.io/releases/0.7.0/aframe.min.js&quot;&gt;&lt;/script&gt;
      
  &lt;script type=&quot;text/javascript&quot; src='http://stackoverflow.com/feeds/tag/js/jsmpg.js'&gt;&lt;/script&gt;
  &lt;script&gt;<br />
  
  <br />
  
                  // Setup the WebSocket connection and start the player<br />
  
                  var client = new WebSocket( 'ws://127.0.0.1:8084/' );<br />
  
                  var canvas = document.getElementById('my-canvas');<br />
  
                  var player = new jsmpeg(client, {canvas:canvas});<br />
  
  <br />
  
                &lt;/script&gt;
  &lt;script&gt;<br />
  
  <br />
  
          AFRAME.registerComponent('draw-canvas', {<br />
  
            schema: {default: ''},<br />
  
            init: function () {<br />
  
              this.canvas = document.getElementById(this.data);<br />
  
              this.ctx = this.canvas.getContext('2d');<br />
  
  <br />
  
            }<br />
  
          });<br />
  
        &lt;/script&gt;