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• parser not found for codec wmav2

  5 décembre 2011, par HashCoder

  I am getting a warning when I run the below command.

  Warning : [asf @ 01C787A0] parser not found for codec wmav2, packets or times may be inval
  id.

  I am using the latest ffmpeg.exe, did I miss any parameters. Any suggestions please.

  ffmpeg -i Assets\Logitech_webcam_on_PC.wmv -sameq -f swf -y -an -s 640x360 MySlide.swf
  
  ffmpeg version N-35295-gb55dd10, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Nov 30 2011 00:52:52 with gcc 4.6.2
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
  
  ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
  
  able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
  
  c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
  
  libxvid --enable-zlib
  
    libavutil    51. 29. 1 / 51. 29. 1
  
    libavcodec   53. 39. 1 / 53. 39. 1
  
    libavformat  53. 22. 0 / 53. 22. 0
  
    libavdevice  53.  4. 0 / 53.  4. 0
  
    libavfilter   2. 50. 0 /  2. 50. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [asf @ 01C787A0] parser not found for codec wmav2, packets or times may be inval
  
  id.
  
  
  
  Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000
  
  /1) -> 0.08 (1/12)
  
  Input #0, asf, from 'Assets\Logitech_webcam_on_PC.wmv':
  
    Metadata:
  
      WMFSDKVersion   : 11.0.5721.5265
  
      WMFSDKNeeded    : 0.0.0.0000
  
      IsVBR           : 1
  
      VBR Peak        : 50500.0000
  
      Buffer Average  : 66550.0000
  
    Duration: 00:00:36.22, start: 0.000000, bitrate: 497 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 32000 Hz, 1 channels,
  
  s16, 20 kb/s
  
      Stream #0:1(eng): Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 320x180, 422 kb/
  
  s, 0.08 tbr, 1k tbn, 1k tbc
  
  [buffer @ 02AA9760] w:320 h:180 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
  [scale @ 02AA9A80] w:320 h:180 fmt:yuv420p -> w:640 h:360 fmt:yuv420p flags:0x4
  
  Output #0, swf, to 'MySlide.swf':
  
    Metadata:
  
      WMFSDKVersion   : 11.0.5721.5265
  
      WMFSDKNeeded    : 0.0.0.0000
  
      IsVBR           : 1
  
      VBR Peak        : 50500.0000
  
      Buffer Average  : 66550.0000
  
      encoder         : Lavf53.22.0
  
      Stream #0:0(eng): Video: flv1, yuv420p, 640x360, q=2-31, 200 kb/s, 90k tbn,
  
  0.08 tbc
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (wmv2 -> flv)
  
  Press [q] to stop, [?] for help
  
  frame=    4 fps=  0 q=0.0 size=      97kB time=00:00:48.00 bitrate=  16.6kbits/s
  
  frame=    5 fps=  0 q=0.0 Lsize=     111kB time=00:01:00.00 bitrate=  15.2kbits/
  
  s dup=0 drop=599
  
  video:111kB audio:0kB global headers:0kB muxing overhead 0.128646%

• Missing audio and problems playing FLV video converted from 720p .mov file with FFMPEG

  18 novembre 2011, par undefined

  I have some .mov video files recorded from a JVC GC-FM1 HD video camera in 720p mode. I have FFMPEG running on a Linux box that I upload files to for encoding into FLV format. The video appears to be encoding ok, but there is no audio in the resulting FLV file. Also, when I play it back in Flash Player, in a browser or on Adobe Media Player, the video pauses at the start. It appears that Adobe Media Player waits for the progress bar to reach the end of the video before starting the playback - i.e. the video will load, the picture pauses, the progress bar seeks to the end as if the video were playing, then when it reaches the end the video picture starts. There is no audio on the video. I am noticing this in the video player I have built with Flash 8 using an FLVPlayback component and attached seekBar. The seek bar will start moving as if the video is playing but the picture remains paused.

  Here are some outputs from my FFMPEG log and the command I am using to encode the video.

  My FFMPEG command called from PHP :

  $cmd = 'ffmpeg -i ' . $sourcelocation.$filename.".".$fileext . '  -ab 96k -b 700k \
  
  -ar 44100 -s ' . $target['width'] . 'x' . $target['height'] . ' -ac 1 \
  
  -acodec libfaac ' . $destlocation.$filename.$ext_trans .' 2>&1';

  The output from my error log :

  FFmpeg version UNKNOWN, Copyright (c) 2000-2010 Fabrice Bellard, et al.
  
  built on Jan 22 2010 11:31:03 with gcc 4.1.2 20070925 (Red Hat 4.1.2-33)
  
  configuration: --prefix=/usr --enable-static --enable-shared --enable-gpl \
  
  --enable-nonfree --enable-postproc --enable-avfilter --enable-avfilter-lavf \
  
  --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm \
  
  --enable-libmp3lame --enable-libvorbis --enable-libx264
  
  libavutil     50. 7. 0 / 50. 7. 0
  
  libavcodec    52.48. 0 / 52.48. 0
  
  libavformat   52.47. 0 / 52.47. 0
  
  libavdevice   52. 2. 0 / 52. 2. 0
  
  libavfilter    1.17. 0 /  1.17. 0
  
  libswscale     0. 9. 0 /  0. 9. 0
  
  libpostproc   51. 2. 0 / 51. 2. 0
  
  
  
  Seems stream 0 codec frame rate differs from container frame rate: 119.88 (120000/1001) -> 59.94 (60000/1001)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'uploads/video/60974_v1.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      comment         : JVC GC-FM1
  
      comment-eng     : JVC GC-FM1
  
    Duration: 00:00:30.41, start: 0.000000, bitrate: 4158 kb/s
  
      Stream #0.0(eng): Video: h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 4017 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
  
  Output #0, rawvideo, to 'uploads/video/60974_v1.jpg':
  
      Stream #0.0(eng): Video: mjpeg, yuvj420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press [q] to stop encoding
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  frame=    1 fps=  0 q=3.8 Lsize=      15kB time=0.02 bitrate=7271.4kbits/s dup=482 drop=0    
  
  video:15kB audio:0kB global headers:0kB muxing overhead 0.000000%

  Which are the important errors here ?

  B picture before any references, skipping ?
  decode_slice_header error ?
  no frame ?
  or
  Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 59.94 (60000/1001)

• ffmpeg merge wav-audio and rtmp-video stream with itsoffset parameter ?

  2 juillet 2015, par whatis01

  I tried to merge WAV audio and RTMP video stream with -itsoffset parameter :

  ffmpeg -i rtmp://server/video/stream_folder/stream_id -itsoffset 00:00:15.0000 -i /audio/1227121.wav \
  
  -codec:v copy -ac 2 -codec:a aac -strict experimental -f flv rtmp://server/sfolder/test_1

  But it works inappropriately (RTMP output is not steady, only voice or only video), and always prompts : mux overhead ratio 2000%, then conversion failed.