Recherche avancée

Sur d’autres sites (10957)

• How to enable different components of FFMPEG ?

  3 décembre 2011, par Richard77

  I've found this C# wrapper code around FFMPEG. I'm using ASP.NET MVC3 and C#. When trying to get it work, I'm getting the following error :

          RawOutput   "ffmpeg version N-34906-g4e7b3ef, Copyright (c) 2000-2011
  
          the FFmpeg developers
  
  
  
          built on Nov 16 2011 12:35:07 with gcc 4.6.2
  
  
  
          configuration: --enable-gpl --enable-version3 --disable-w32threads 
  
          --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r 
  
          --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype 
  
          --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp 
  
          --enable-libschroedinger --enable-libspeex --enable-libtheora 
  
          --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
  
          --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid 
  
          --enable-zlib
  
  
  
          libavutil    51. 25. 0 / 51. 25. 0
  
          libavcodec   53. 34. 0 / 53. 34. 0 
  
          libavformat  53. 20. 0 / 53. 20. 0 
  
          libavdevice  53.  4. 0 / 53.  4. 0  
  
          libavfilter   2. 48. 1 /  2. 48. 1 
  
          libswscale    2.  1. 0 /  2.  1. 0 
  
          libpostproc  51.  2. 0 / 51.  2. 0
  
          [wmv3 @ 002BFA00] Extra data: 8 bits left, value: 0
  
          [asf @ 002B8A80] parser not found for codec wmav2, packets or times may be invalid.
  
          Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 30.00 (30/1)
  
          Input #0, asf, from 'C:\\FfMpeg\\Videos\\Original\\Video1.wmv':
  
          Metadata:
  
          WMFSDKVersion   : 11.0.6002.18049   
  
          WMFSDKNeeded    : 0.0.0.0000
  
          IsVBR           : 0
  
          Duration: 00:00:41.80, start: 0.000000, bitrate: 888 kb/s
  
          Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, s16, 64 kb/s
  
          Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 320x240, 786 kb/s, 30 tbr, 1k tbn, 1k tbc
  
          Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
  
          [buffer @ 031D8DA0] w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
          [buffersink @ 031D8FA0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
  
          [scale @ 03106C20] w:320 h:240 fmt:yuv420p -> w:320 h:240 fmt:yuvj420p flags:0x4
  
          [wmv3 @ 002BFA00] Extra data: 8 bits left, value: 0
  
          Output #0, image2, to '87334ed0-2bcf-4be5-82ae-9089c14e0323.jpg':
  
          Metadata:
  
          WMFSDKVersion   : 11.0.6002.18049
  
          WMFSDKNeeded    : 0.0.0.0000
  
          IsVBR           : 0
  
          encoder         : Lavf53.20.0
  
          Stream #0:0(eng): Video: mjpeg, yuvj420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 30 tbc
  
          Stream mapping:
  
          Stream #0:1 -> #0:0 (wmv3 -> mjpeg)
  
          Press [q] to stop, [?] for help
  
          [image2 @ 03107920] Could not open file : 87334ed0-2bcf-4be5-82ae-9089c14e0323.jpg
  
          av_interleaved_write_frame(): Input/output error
  
          "   string

  I'm absolutely new to FFMPEG, so I don't know where to start to solve the above probleme.

  EDIT

  public ActionResult Convert()
  
      {
  
          Converter _converter = new Converter(@"C:\FfMpeg\ffmpeg.exe");
  
          OutputPackage oo = _converter.ConvertToFLV(@"C:\FfMpeg\Videos\Original\Video1.wmv");
  
  
  
          FileStream outStream = System.IO.File.OpenWrite(@"C:\FfMpeg\Videos\Converted\Video1.flv");
  
          oo.VideoStream.WriteTo(outStream);
  
          outStream.Flush();
  
          outStream.Close();
  
  
  
          oo.PreviewImage.Save(@"C:\FfMpeg\Videos\Thumbnail\Thumbnail1.jpg");
  
  
  
          return RedirectToAction("WatchMovie");
  
      }

  Thanks for helping

• ffmpeg : images to 29.97fps mpeg2, audio not sync [migrated]

  21 novembre 2011, par Andy Le

  I have spent a lot of time on this issue. Hope someone can help.

  I want to convert 3147 images + ac3 audio file into an mpeg2 video at 29.97fps (about 1m45s). My command :

  ~/ffmpeg/ffmpeg/ffmpeg -loop_input -t 105 -i v%4d.tga -i final.ac3 -vcodec mpeg2video -qscale 1 -s 400x400 -r 30000/1001 -acodec copy -y out.mpeg 2> out.txt

  However, the audio file ends before the frame sequence. Which means the video is slower then audio.

  I checked the output file with imageinfo and see :

  General
  
  Complete name                    : out.mpeg
  
  Format                           : MPEG-PS
  
  File size                        : 7.18 MiB
  
  Duration                         : 1mn 44s
  
  Overall bit rate                 : 574 Kbps
  
  
  
  Video
  
  ID                               : 224 (0xE0)
  
  Format                           : MPEG Video
  
  Format version                   : Version 2
  
  Format profile                   : Main@Main
  
  Format settings, BVOP            : No
  
  Format settings, Matrix          : Default
  
  Format_Settings_GOP              : M=1, N=12
  
  Duration                         : 1mn 44s
  
  Bit rate mode                    : Variable
  
  Bit rate                         : 103 Kbps
  
  Width                            : 400 pixels
  
  Height                           : 400 pixels
  
  Display aspect ratio             : 1.000
  
  Frame rate                       : 29.970 fps
  
  Resolution                       : 8 bits
  
  Colorimetry                      : 4:2:0
  
  Scan type                        : Progressive
  
  Bits/(Pixel*Frame)               : 0.021
  
  Stream size                      : 1.29 MiB (18%)
  
  
  
  Audio
  
  ID                               : 128 (0x80)
  
  Format                           : AC-3
  
  Format/Info                      : Audio Coding 3
  
  Duration                         : 1mn 44s
  
  Bit rate mode                    : Constant
  
  Bit rate                         : 448 Kbps
  
  Channel(s)                       : 6 channels
  
  Channel positions                : Front: L C R, Side: L R, LFE
  
  Sampling rate                    : 44.1 KHz
  
  Stream size                      : 5.61 MiB (78%)

  The log from ffmpeg shows many duplicate frames. But I don't know how to get rid of that.

  -loop_input is deprecated, use -loop 1
  
  [image2 @ 0x9c17a80] max_analyze_duration 5000000 reached at 5000000
  
  Input #0, image2, from 'v%4d.tga':
  
    Duration: 00:02:05.88, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: targa, bgr24, 400x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  -loop_input is deprecated, use -loop 1
  
  [ac3 @ 0x9ca5420] max_analyze_duration 5000000 reached at 5014400
  
  [ac3 @ 0x9ca5420] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, ac3, from 'Final.ac3':
  
    Duration: 00:20:10.68, start: 0.000000, bitrate: 447 kb/s
  
      Stream #1:0: Audio: ac3, 44100 Hz, 5.1(side), s16, 448 kb/s
  
  Incompatible pixel format 'bgr24' for codec 'mpeg2video', auto-selecting format 'yuv420p'
  
  [buffer @ 0x9c1e060] w:400 h:400 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param:
  
  [buffersink @ 0x9dd56c0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x9c178e0] w:400 h:400 fmt:bgr24 -> w:400 h:400 fmt:yuv420p flags:0x4
  
  [mpeg @ 0x9d58060] VBV buffer size not set, muxing may fail
  
  Output #0, mpeg, to 'out.mpeg':
  
    Metadata:
  
      encoder         : Lavf53.21.0
  
      Stream #0:0: Video: mpeg2video, yuv420p, 400x400, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
  
      Stream #0:1: Audio: ac3, 44100 Hz, 5.1(side), 448 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (targa -> mpeg2video)
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  267 fps=  0 q=1.0 size=     564kB time=00:00:08.87 bitrate= 520.6kbits/s dup=43 drop=0    
  
  frame=  544 fps=542 q=1.0 size=    1186kB time=00:00:18.11 bitrate= 536.2kbits/s dup=89 drop=0    
  
  frame=  821 fps=546 q=1.0 size=    1818kB time=00:00:27.36 bitrate= 544.3kbits/s dup=135 drop=0    
  
  frame= 1098 fps=548 q=1.0 size=    2444kB time=00:00:36.60 bitrate= 547.0kbits/s dup=181 drop=0    
  
  frame= 1376 fps=549 q=1.0 size=    3072kB time=00:00:45.87 bitrate= 548.5kbits/s dup=227 drop=0    
  
  frame= 1653 fps=550 q=1.0 size=    3700kB time=00:00:55.12 bitrate= 549.9kbits/s dup=273 drop=0    
  
  frame= 1930 fps=550 q=1.0 size=    4326kB time=00:01:04.36 bitrate= 550.6kbits/s dup=319 drop=0    
  
  frame= 2208 fps=551 q=1.0 size=    4960kB time=00:01:13.64 bitrate= 551.8kbits/s dup=365 drop=0    
  
  frame= 2462 fps=546 q=1.0 size=    5746kB time=00:01:22.11 bitrate= 573.2kbits/s dup=407 drop=0    
  
  frame= 2728 fps=544 q=1.0 size=    6354kB time=00:01:30.99 bitrate= 572.1kbits/s dup=451 drop=0    
  
  frame= 3007 fps=545 q=1.0 size=    6980kB time=00:01:40.28 bitrate= 570.2kbits/s dup=498 drop=0    
  
  frame= 3146 fps=546 q=1.0 Lsize=    7352kB time=00:01:44.93 bitrate= 573.9kbits/s dup=521 drop=0    
  
  
  
  video:1518kB audio:5745kB global headers:0kB muxing overhead 1.230493%

• Creating thumbnails with FFmpeg

  3 janvier 2012, par Calin-Andrei Burloiu

  I am using FFmpeg to extract thumbnails from specific positions of video files.

  I found on the web two approaches to do this :

  1. With -ss (seek) parameter before -i (input) parameter :

     ffmpeg -y -ss $SEEK_POINT -i input.ogv -vcodec mjpeg -vframes 1 -an -s 120x90 -f rawvideo output.jpg

  2. With -ss (seek) parameter after -i (input) parameter :

     ffmpeg -y -i input.ogv -vcodec mjpeg -ss $SEEK_POINT -vframes 1 -an -s 120x90 -f rawvideo output.jpg

  The first method generates a bad thumbnail with gray spots, but works very fast. The error returned is [theora @ 0x8097240] vp3: first frame not a keyframe.

  The second method always works but show an error which cause the extraction to take a lot of time. This amount of time is not fixed and it depends on the seek point as I noticed. Sometimes it takes a few seconds and other times several minutes to extract a thumbnail. I get the error Buffering several frames is not supported. Please consume all available frames before adding a new one. in the following output :

  Input #0, ogg, from 'input.ogv':
  
    Duration: 00:21:52.76, start: 0.000000, bitrate: 844 kb/s
  
      Stream #0.0: Video: theora, yuv420p, 800x600 [PAR 4:3 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
      Stream #0.1: Audio: vorbis, 44100 Hz, stereo, s16, 192 kb/s
  
      Metadata:
  
        ENCODER         : Lavf52.102.0
  
  Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'                                                                         
  
  [buffer @ 0x9250840] w:800 h:600 pixfmt:yuv420p                                 
  
  [scale @ 0x92508a0] w:800 h:600 fmt:yuv420p -> w:120 h:90 fmt:yuvj420p flags:0x4
  
  Output #0, rawvideo, to 'output.jpg':
  
    Metadata:
  
      encoder         : Lavf53.2.0
  
      Stream #0.0: Video: mjpeg, yuvj420p, 120x90 [PAR 4:3 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press ctrl-c to stop encoding
  
  [buffer @ 0x9250840] Buffering several frames is not supported. Please consume all available frames before adding a new one.                                    
  
  frame=    0 fps=  0 q=0.0 size=       0kB time=10000000000.00 bitrate=   0.0kbit
  
  Last message repeated 15448 times
  
  frame=    1 fps=  0 q=3.4 Lsize=       3kB time=0.04 bitrate= 598.8kbits/s    
  
  video:3kB audio:0kB global headers:0kB muxing overhead 0.000000%

  How can I extract thumbnails without any problems using FFmpeg from a custom position of a video regardless of the input format ?