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• Evolution #2269 : Prise en compte des variantes d’une langue

  14 mai 2013, par kent1 -

  En fait il faudrait :

  1. les gérer dans SPIP (facile en rajoutant la langue dans inc/lang_liste.php)

  2. les gérer dans tradlang pour la création

  3. dans tradlang, si un module que l’on souhaite traduire dans une variante (par exemple en_US) existe déjà dans la langue principale (en), il utilise les traductions de cette langue comme version de base et non le contenu de la langue mère

  Une problématique est que salvatore exporte tout le module même si les items ne sont pas traduits (à ce moment là ils sont en français).

  La plus grosse problématique est le maintient de cette variante de langue je pense, mais bon.

  Est ce tout ?

• Audioqueue try to read ADPCM sound

  4 septembre 2013, par Kamax

  I try to read a .asf stream with FFMPEG and the audio part is ADPCM IMA WAV codec.

  The sound i hear when i hear something is only noise. I suppose my AudioStreamBasicDescription are wrong. How can i get the correct values ?

  From ffprobe i have this :

  [STREAM]
  
  index=1
  
  codec_name=adpcm_ima_wav
  
  codec_long_name=ADPCM IMA WAV
  
  codec_type=audio
  
  codec_time_base=1/8000
  
  codec_tag_string=[17][0][0][0]
  
  codec_tag=0x0011
  
  sample_rate=8000.000000 
  
  channels=1
  
  bits_per_sample=4
  
  r_frame_rate=0/0
  
  avg_frame_rate=250/41
  
  time_base=1/1000
  
  start_time=0.000000 
  
  duration=N/A
  
  [/STREAM]

  and

  Stream #0.1: Audio: adpcm_ima_wav, 8000 Hz, 1 channels, s16, 32 kb/s

  my code for the moment is :

  asbd.mSampleRate = 8000;
  
  asbd.mFormatID = kAudioFormatAppleIMA4;
  
  asbd.mBytesPerPacket = 34;
  
  asbd.mFramesPerPacket = 64;
  
  asdb.mbitsPerChannel = 1;

  All the rest is to 0 (flags, byte per frame, bits per channel, reserved).

  Edit :

  I just find that the codec code 17 is maybe for kAudioFormatDVIIntelIMA and not kAudioFormatAppleIMA4. Can someone confirm this ?

  This is from ffprobe :

  [PACKET]
  
  codec_type=audio
  
  stream_index=1
  
  pts=11200
  
  pts_time=11.200000 
  
  dts=11200
  
  dts_time=11.200000 
  
  duration=164
  
  duration_time=0.164000 
  
  size=656.000000 
  
  pos=1171105
  
  flags=K
  
  [/PACKET]

  Is the size 656 for mBytesperpacket ?

  With this value and the half 328 for mFramesPerPacket i can hear something but it's not continuous and has a lot of noise.

  Please help !

• ios http live black screen

  11 mars 2013, par jagsler

  In my ios app I am trying to play videos using http live streaming. The playing goes well until I decide to use the scrubber and skip to some point that hasn't buffered yet. From that moment the audio goes on but the videos goes black.

  I've converted my .MP4 videos with the following command :

  avconv -y -i video.mp4 -f mpegts -acodec libmp3lame -ar 48000 -ab 64k -s 640x480 -vcodec libx264 -b 64k -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 7 -trellis 0 -refs 0 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate 64k -bufsize 64k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 30 -qmax 51 -qdiff 4 -level 30 -aspect 640:480 -g 30 -async 2 sample_64.ts

  I did this with multiple bitrates (64, 150, 240, 440 and 640) and created one .m3u8 that contains the different streams. After converting I used the mediafilesegmenter to split the video in segments of each 10 seconds.

  After scrubbing the following appears in the output window :

  2013-03-08 17:30:21.827 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Disabling autoplay for pause
  
  2013-03-08 17:30:21.827 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Disabling autoplay
  
  2013-03-08 17:30:21.977 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: _streamUnlikelyToKeepUp: 1 -> 0
  
  2013-03-08 17:30:21.978 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
  
  2013-03-08 17:30:21.978 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: _streamRanDry: 0 -> 1
  
  2013-03-08 17:30:21.980 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Took background task assertion (32) for playback stall
  
  2013-03-08 17:30:21.981 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
  
  2013-03-08 17:30:22.634 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: _streamUnlikelyToKeepUp: 0 -> 0
  
  2013-03-08 17:30:22.634 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: _streamRanDry: 0 -> 1
  
  2013-03-08 17:30:22.667 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
  
  2013-03-08 17:30:22.769 Geschiedenis Trainer[88129:19a03] [MPAVController] Autoplay: Ending background task assertion (32) for playback stall

  The code for my videoplayer :

  self.streamPlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
  
  [self.view addSubview:self.streamPlayer.view];
  
  [self.streamPlayer setFullscreen:YES animated:YES];

  This problem does not occur when skipping to a point that has already been buffered.