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• "Unknown encoder libx264" on Windows [migrated]

  29 novembre 2012, par shampoo

  I'm testing ClipBucket on a Windows XP system, and ClipBucket (open source video share) uses FFmpeg to convert videos. The final command it executes is (i changed it a little to make it compatible with the current FFmpeg):

  D:\ffmpeg-snapshot-git\ffmpeg\ffmpeg.exe -i C:
  \wamp\www\chclip/files/conversion_queue/1352973741c353c.mp4 -f flv -vcodec libx2
  64 -pre normal -r 25 -s 426x240 -aspect 1.775 -vf "pad=10:20:30:40:yellow"  -ac
  odec libfaac -ab 128000 -ar 22050 C:\wamp\www\chclip/files/videos/13540939451e18
  4.flv 2> C:\wamp\www\chclip/files/temp/13540939461c124.tmp 2>&1
  

  And this is the response I get:

  ffmpeg version 1.0.git Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 19 2012 16:42:42 with gcc 4.6.2 (GCC)
  configuration:
  libavutil      52.  8.100 / 52.  8.100
  libavcodec     54. 73.100 / 54. 73.100
  libavformat    54. 37.100 / 54. 37.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.101 /  3. 23.101
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\wamp\www\chclip/files/conversion_que
  ue/1352973741c353c.mp4':
  Metadata:
  major_brand     : isom
  minor_version   : 512
  compatible_brands: isomiso2avc1mp41
  encoder         : Lavf53.21.0
  Duration: 00:00:51.67, start: 0.000000, bitrate: 344 kb/s
  Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 426x240 [
  SAR 1:1 DAR 71:40], 308 kb/s, 15 fps, 15 tbr, 15 tbn, 30 tbc
  Metadata:
  handler_name    : VideoHandler
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 31
  kb/s
  Metadata:
  handler_name    : SoundHandler
  Unknown encoder 'libx264'
  

  How can I get this libx264 working in Windows?

• how to cancel voice audio echo with ffmpeg ? [closed]

  29 novembre 2012, par user1861979

  when using ffmpeg to live streaming audio from desktop, voice echo happends. Is there an AEC filter in ffmpeg?

• unknown encoder libx264 windows

  28 novembre 2012, par shampoo

  i am testing clip bucket on a windows xp system , clip bucket (open source video share) uses ffmpeg to convert videos, the final command clip bucket executes is (i changed it a little to make it compatible with the current ffmpeg):

  D:\ffmpeg-snapshot-git\ffmpeg\ffmpeg.exe -i C:
  \wamp\www\chclip/files/conversion_queue/1352973741c353c.mp4 -f flv -vcodec libx2
  64 -pre normal -r 25 -s 426x240 -aspect 1.775 -vf "pad=10:20:30:40:yellow"  -ac
  odec libfaac -ab 128000 -ar 22050 C:\wamp\www\chclip/files/videos/13540939451e18
  4.flv 2> C:\wamp\www\chclip/files/temp/13540939461c124.tmp 2>&1
  

  and this is the response i get

  ffmpeg version 1.0.git Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 19 2012 16:42:42 with gcc 4.6.2 (GCC)
  configuration:
  libavutil      52.  8.100 / 52.  8.100
  libavcodec     54. 73.100 / 54. 73.100
  libavformat    54. 37.100 / 54. 37.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.101 /  3. 23.101
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\wamp\www\chclip/files/conversion_que
  ue/1352973741c353c.mp4':
  Metadata:
  major_brand     : isom
  minor_version   : 512
  compatible_brands: isomiso2avc1mp41
  encoder         : Lavf53.21.0
  Duration: 00:00:51.67, start: 0.000000, bitrate: 344 kb/s
  Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 426x240 [
  SAR 1:1 DAR 71:40], 308 kb/s, 15 fps, 15 tbr, 15 tbn, 30 tbc
  Metadata:
  handler_name    : VideoHandler
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 31
  kb/s
  Metadata:
  handler_name    : SoundHandler
  Unknown encoder 'libx264'
  

  how can i get this libx264 working in windows?

• Get aspect ratio of video from FFmpeg

  28 novembre 2012, par Rocky Singh

  I am using FFmpeg to convert a video from one format to another. I need to extract the aspect ratio of the video first. How can I find that information?

• FFmpeg video to still images and back to video lossless

  28 novembre 2012, par Rigoni

  I'm trying to extract an image from an uncompressed AVI video using FFmpeg with the command:

  ffmpeg -i sorce.avi -f image2 -pix_fmt bgr24 images/%1d.bmp
  

  All is okay, but now I need to convert these images back to a video file.
  I'm trying using this command:

  ffmpeg -f image2 -r 24 -i marked/%1d.bmp -y -vcodec ffv1 -pix_fmt bgr24 test.avi
  

  But the output video is compressed and poor quality.

  Is there any way to extract the images in RGB format and than back to a lossless video?

  I also tryed to use -vcodec rawvideo, but the quality still bad.