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• Progress with rtc.io

  12 août 2014, par silvia

  At the end of July, I gave a presentation about WebRTC and rtc.io at the WDCNZ Web Dev Conference in beautiful Wellington, NZ.

  

  Putting that talk together reminded me about how far we have come in the last year both with the progress of WebRTC, its standards and browser implementations, as well as with our own small team at NICTA and our rtc.io WebRTC toolbox.

  

  One of the most exciting opportunities is still under-exploited : the data channel. When I talked about the above slide and pointed out Bananabread, PeerCDN, Copay, PubNub and also later WebTorrent, that’s where I really started to get Web Developers excited about WebRTC. They can totally see the shift in paradigm to peer-to-peer applications away from the Server-based architecture of the current Web.

  Many were also excited to learn more about rtc.io, our own npm nodules based approach to a JavaScript API for WebRTC.

  

  We believe that the World of JavaScript has reached a critical stage where we can no longer code by copy-and-paste of JavaScript snippets from all over the Web universe. We need a more structured module reuse approach to JavaScript. Node with JavaScript on the back end really only motivated this development. However, we’ve needed it for a long time on the front end, too. One big library (jquery anyone ?) that does everything that anyone could ever need on the front-end isn’t going to work any longer with the amount of functionality that we now expect Web applications to support. Just look at the insane growth of npm compared to other module collections :

  

  For those that – like myself – found it difficult to understand how to tap into the sheer power of npm modules as a font end developer, simply use browserify. npm modules are prepared following the CommonJS module definition spec. Browserify works natively with that and “compiles” all the dependencies of a npm modules into a single bundle.js file that you can use on the front end through a script tag as you would in plain HTML. You can learn more about browserify and module definitions and how to use browserify.

  For those of you not quite ready to dive in with browserify we have prepared prepared the rtc module, which exposes the most commonly used packages of rtc.io through an “RTC” object from a browserified JavaScript file. You can also directly download the JavaScript file from GitHub.

  

  So, I hope you enjoy rtc.io and I hope you enjoy my slides and large collection of interesting links inside the deck, and of course : enjoy WebRTC ! Thanks to Damon, JEeff, Cathy, Pete and Nathan – you’re an awesome team !

  On a side note, I was really excited to meet the author of browserify, James Halliday (@substack) at WDCNZ, whose talk on “building your own tools” seemed to take me back to the times where everything was done on the command-line. I think James is using Node and the Web in a way that would appeal to a Linux Kernel developer. Fascinating !!

• Android ExoPlayer stream mp3 over HTTP

  8 juillet 2016, par kevintcoughlin

  I’m trying to get a grasp on the new ExoPlayer library introduced this year at Google I/O 2014 so that I can incorporate it into my application.

  I’m attempting to stream an mp3 over HTTP, but so far have been unsuccessful. I’m not sure if it’s possible, but I’m trying to accomplish this without extending any of the base Source/Sample classes. My code is as follows :

  In my Activity

  SampleSource s = new FrameworkSampleSource(this, Uri.parse("http://traffic.libsyn.com/joeroganexp/p518.mp3"), null, 1);
  
  
  
  // Since I only have 1 audio renderer
  
  ExoPlayer player = ExoPlayer.Factory.newInstance(1);
  
  
  
  MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(s);
  
  player.prepare(audioRenderer);
  
  player.setPlayWhenReady(true);

  Logcat

  3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ SniffFFMPEG
  
  07-06 15:52:34.080    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ android-source:0xb7c53e00
  
  07-06 15:52:34.084    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source begin open
  
  07-06 15:52:34.084    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android open, url: android-source:0xb7c53e00
  
  07-06 15:52:34.084    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ ffmpeg open android data source success, source ptr: 0xb7c53e00
  
  07-06 15:52:34.088    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source open success
  
  07-06 15:52:34.108    3363-3363/com.kevintcoughlin.smodr W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
  
  07-06 15:52:34.116    3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from GradienCache
  
  07-06 15:52:34.120    3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
  
  07-06 15:52:34.128    3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
  
  07-06 15:52:34.128    3363-3363/com.kevintcoughlin.smodr E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
  
  07-06 15:52:34.128    3363-3363/com.kevintcoughlin.smodr D/OpenGLRenderer﹕ Enabling debug mode 0
  
  07-06 15:52:34.640    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ [mp3 @ 0xb7c57040] Estimating duration from bitrate, this may be inaccurate
  
  07-06 15:52:34.640    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Input #0, mp3, from 'android-source:0xb7c53e00':
  
  07-06 15:52:34.640    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Metadata:
  
  07-06 15:52:34.640    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ TSS             : Logic Pro 9.1.8
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ title           : #518 - Matt Fulchiron
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ artist          : Joe Rogan Experience
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ album_artist    : Joe Rogan Experience
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Duration: 02:57:10.21, start: 0.000000, bitrate: 127 kb/s
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ FFmpegExtrator, url: android-source:0xb7c53e00, format_name: mp3, format_long_name: MP2/3 (MPEG audio layer 2/3)
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ list the formats suppoted by ffmpeg:
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[00]: mpeg
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[01]: mpegts
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[02]: mov,mp4,m4a,3gp,3g2,mj2
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[03]: matroska,webm
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[04]: asf
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[05]: rm
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[06]: flv
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[07]: swf
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[08]: avi
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[09]: ape
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[10]: dts
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[11]: flac
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[12]: ac3
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[13]: wav
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[14]: ogg
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[15]: vc1
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[16]: hevc
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source close
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr W/FFmpegExtractor﹕ sniff through BetterSniffFFMPEG failed, try LegacySniffFFMPEG
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ source url:http://traffic.libsyn.com/joeroganexp/p518.mp3
  
  07-06 15:52:34.644    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source begin open
  
  07-06 15:52:34.648    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android open, url: android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3
  
  07-06 15:52:34.648    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ ffmpeg open android data source success, source ptr: 0xb7c53e00
  
  07-06 15:52:34.648    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source open success
  
  07-06 15:52:34.708    3363-3394/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 361K, 4% free 10852K/11288K, paused 75ms, total 75ms
  
  07-06 15:52:34.844    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ [mp3 @ 0xb7ca7700] Estimating duration from bitrate, this may be inaccurate
  
  07-06 15:52:34.844    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Input #0, mp3, from 'android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3':
  
  07-06 15:52:34.844    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Metadata:
  
  07-06 15:52:34.844    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ TSS             : Logic Pro 9.1.8
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ title           : #518 - Matt Fulchiron
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ artist          : Joe Rogan Experience
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ album_artist    : Joe Rogan Experience
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Duration: 02:57:10.21, start: 0.000000, bitrate: 127 kb/s
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFMPEG﹕ Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
  07-06 15:52:34.848    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ FFmpegExtrator, url: android-source:0xb7c53e00|file:http://traffic.libsyn.com/joeroganexp/p518.mp3, format_name: mp3, format_long_name: MP2/3 (MPEG audio layer 2/3)
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ list the formats suppoted by ffmpeg:
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[00]: mpeg
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[01]: mpegts
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[02]: mov,mp4,m4a,3gp,3g2,mj2
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[03]: matroska,webm
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[04]: asf
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[05]: rm
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[06]: flv
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[07]: swf
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[08]: avi
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[09]: ape
  
  07-06 15:52:34.852    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[10]: dts
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[11]: flac
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[12]: ac3
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[13]: wav
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[14]: ogg
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[15]: vc1
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr V/FFmpegExtractor﹕ format_names[16]: hevc
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr I/FFmpegExtractor﹕ ========================================
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr D/FFMPEG﹕ android source close
  
  07-06 15:52:34.856    3363-3376/com.kevintcoughlin.smodr D/FFmpegExtractor﹕ SniffFFMPEG failed to sniff this source
  
  07-06 15:52:34.856    3363-3397/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 120K, 3% free 12342K/12696K, paused 29ms, total 60ms
  
  07-06 15:52:34.860    3363-3397/com.kevintcoughlin.smodr I/dalvikvm-heap﹕ Grow heap (frag case) to 13.981MB for 1960012-byte allocation
  
  07-06 15:52:34.872    3363-3387/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed <1K, 3% free 14256K/14612K, paused 10ms, total 10ms
  
  07-06 15:52:34.880    3363-3376/com.kevintcoughlin.smodr I/OMXClient﹕ Using client-side OMX mux.
  
  07-06 15:52:34.976    3363-3400/com.kevintcoughlin.smodr I/OMXClient﹕ Using client-side OMX mux.
  
  07-06 15:52:35.144    3363-3393/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed 1512K, 12% free 13705K/15532K, paused 12ms, total 36ms
  
  07-06 15:52:35.152    3363-3393/com.kevintcoughlin.smodr I/dalvikvm-heap﹕ Grow heap (frag case) to 15.315MB for 1962812-byte allocation
  
  07-06 15:52:35.200    3363-3388/com.kevintcoughlin.smodr D/dalvikvm﹕ GC_FOR_ALLOC freed <1K, 11% free 15621K/17452K, paused 39ms, total 39ms
  
  07-06 15:52:35.356    3363-3400/com.kevintcoughlin.smodr E/ACodec﹕ OMX/mediaserver died, signalling error!
  
  07-06 15:52:35.356    3363-3400/com.kevintcoughlin.smodr E/MediaCodec﹕ Codec reported an error. (omx error 0x8000100d, internalError -32)
  
  07-06 15:52:35.376    3363-3400/com.kevintcoughlin.smodr A/ACodec﹕ frameworks/av/media/libstagefright/ACodec.cpp:499 CHECK(mem.get() != NULL) failed.
  
  07-06 15:52:35.376    3363-3400/com.kevintcoughlin.smodr A/libc﹕ Fatal signal 4 (SIGILL) at 0xb76d563d (code=2), thread 3400 (MediaCodec_loop)

  To my untrained eye it seems like I can get the TrackInfo correctly, but am having a problem reading the data over HTTP. It also seems that how the framework sniffs the mimetype is failing even though I do receive type ’audio/mpeg’.

  Again, I appreciate any direction I receive. I realize that these APIs are very new.

  • ExoPlayer Developer Docs
  • ExoPlayer Source
  • ExoPlayer Class Ref

  Thanks !

• Revision 80e5326cf2 : Use offset mode info when filling pc tree. Use the appropriate subblock offset

  23 mai 2014, par Alex Converse

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
  
  Use offset mode info when filling pc tree.

  Use the appropriate subblock offset mode info rather than the parent
  block base, when filling mbmi in the pc tree in nonrd_use_partition.
  This mimics what is done in the vertical case and what is done for
  both cases in nonrd_pick_partition.

  This change has little practical effect at the moment since in speed 5
  rt horizontal and vertical partitions are currently only used unpaired
  at edges of the picture.

  Change-Id : I4632f66ca84086dac56c7d36b45ddbe38a06f42a