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• ffmpeg encoding plays very fast. Audio.mp4 and Video.mp4 work, but both together don't

  25 février 2013, par Peter.O

  In both steps 3 and 4 below, the .mp4 plays normally. However, although I've used what seems to be the same settings in the last step (audio + video), that step does not work. The video plays more than 10 times too fast... also the audio does not play.

  The ffmpeg messages for step 5 show that it has included audio.

  Output #0, mp3, to '/tmp/test.mp4':
  
      Stream #0.0: Video: libx264, yuv420p, 720x480, q=2-31, 90k tbn, 23.98 tbc
  
      Stream #0.1: Audio: libmp3lame, 48000 Hz, stereo, s16, 128 kb/s

  Subsequently running ffmpeg -i shows no trace of the audio, but it does report on the video... What have I missed, to get it muxed properly ?...

  #!/bin/bash
  
  
  
  # 1. create Audio 
  
  wine avs2pipe.exe audio "$src_avs" >"$temp_pcm"
  
  
  
  # 2. create Video 
  
  wine avs2yuv.exe "$src_avs" - |
  
    x264 --stdin y4m --output "$temp_h264" - 2>/dev/null
  
  
  
  # 3. This works.  (audio only)
  
  # encode `audio.mp4 
  
  ffmpeg -acodec pcm_s16le -f u16le -ac 2 -ar 48000 -i "$temp_pcm" \
  
         -acodec libmp3lame -f mp3 -ar 48000 -ab 128k  -y "$audio_mp4"
  
  
  
  # 4. This works.  (video only)
  
  # encode `video.mp4 
  
  ffmpeg -i "$temp_h264" \
  
         -vcodec copy -y "$video_mp4"
  
  
  
  # 5. This DOES NOT work!  It plays very fast.
  
  # encode `final.mp4' 
  
  ffmpeg -acodec pcm_s16le  -f u16le  -ac 2 -ar 48000  -i "$temp_pcm" \
  
         -i "$temp_h264" \
  
         -acodec libmp3lame -f mp3 -ar 48000 -ab 128k \
  
         -vcodec copy \
  
         -y "$final_mp4"

• Convert mp3 to amr using the jave in centos but that is not work

  13 août 2014, par zt9788

  I want to Convert mp3 to amr using the JAVE which uses ffmpeg.

  And i had install ffmpeg

  rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm 
  
  yum -y install ffmpeg ffmpeg-devel 
  
  **yum install amrnb-devel amrwb-devel**

  I can use ffmpeg to convet audio file

  ffmpeg -i 1.mp3 -ac 1 -ar 8000 1.amr//it is can work

  But when i use the jave it is not support libamr_nb in centos 6.5 :

  Encoder encoder = new Encoder();
  
      try {
  
          String[] strings = encoder.getAudioEncoders();
  
          for(String ss : strings){
  
              logger.error(ss);
  
          }
  
      } catch (EncoderException e) {
  
          logger.error(e.getMessage());
  
          e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
  
      }

  print :

  ac3,adpcm_adx,adpcm_ima_wav,adpcm_ms,adpcm_swf,adpcm_yamaha,flac,g726,libfaac
  
  libmp3lame,mp2,pcm_alaw,pcm_mulaw,pcm_s16be,pcm_s16le,pcm_s24be,pcm_s24daud
  
  pcm_s24le,pcm_s32be,pcm_s32le,pcm_s8,pcm_u16be,pcm_u16le,pcm_u24be,pcm_u24le
  
  pcm_u32be,pcm_u32le,pcm_u8,pcm_zork,roq_dpcm,sonic,sonicls,vorbis,wmav1,wmav2

  I can use the same code in windows.

• Revision eb863b46f3 : Reworks PSNR/SSIM to work on source bit-depth Change-Id : Ifcd31186b67a57d57abd1

  30 mai 2014, par Deb Mukherjee

  Changed Paths :
   Modify /vp9/common/vp9_rtcd_defs.pl

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_ssim.c

  
   Modify /vp9/encoder/vp9_ssim.h

  
   Modify /vpxenc.c

  
  
  Reworks PSNR/SSIM to work on source bit-depth

  Change-Id : Ifcd31186b67a57d57abd112d64d163c7b76728e9