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• How to grap voice and vedio in ffmpeg \ mplayer\mencoder ?

  4 février 2013, par Kill Kill

  My target is to grap voice and vedio via webcamera,there are three ways to do :

  1.ffmpeg -f oss -i /dev/dsp -f video4linux2 -r 25 -b 500000 -s 320x240 -i /dev/video0 out.mpg
  WARNING : gnome-keyring: : couldn't connect to : /home/debian/.cache/keyring-4Hzs4r/pkcs11 : No such file or directory
  ffmpeg version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the Libav developers
  built on Jan 13 2013 16:02:15 with gcc 4.7.2
  * THIS PROGRAM IS DEPRECATED *
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  [oss @ 0x9d63c60] /dev/dsp : No such file or directory
  /dev/dsp : Input/output error

  in my computer how to revise it ?

  2.mplayer tv :// -tv driver=v4l2:input=0:width=640:height=480:fps=25 -vo x11
  i can see the veido when the command run ,how can l save the output into a file and grap the voice ?

  3.mencoder tv :// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:outfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

  MEncoder svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team
  success : format : 9 data : 0x0 - 0x0
  TV file format detected.
  Selected driver : v4l2
  name : Video 4 Linux 2 input
  author : Martin Olschewski
  comment : first try, more to come
  v4l2 : your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.
  Selected device : PC Camera
  Capabilities : video capture read/write streaming
  supported norms :
  inputs : 0 = zc3xx ;
  Current input : 0
  Current format : unknown (0x4745504a)
  tv.c : norm_from_string(pal) : Bogus norm parameter, setting default.
  v4l2 : ioctl enum norm failed : Inappropriate ioctl for device
  Error : Cannot set norm !
  Selected input hasn't got a tuner !
  ALSA lib pcm_hw.c:1401 :(_snd_pcm_hw_open) Invalid value for card
  Error opening audio : No such file or directory
  ALSA lib pcm_hw.c:1401 :(_snd_pcm_hw_open) Invalid value for card
  Error opening audio : No such file or directory
  ALSA lib pcm_hw.c:1401 :(_snd_pcm_hw_open) Invalid value for card
  Error opening audio : No such file or directory
  v4l2 : ioctl set mute failed : Invalid argument
  v4l2 : 0 frames successfully processed, 0 frames dropped.
  ============ Sorry, this file format is not recognized/supported =============
  === If this file is an AVI, ASF or MPEG stream, please contact the author ! ===
  Cannot open demuxer.

  Exiting...

• FFMPEG Error VC1 to X264 (maybe decoding VC1)

  29 janvier 2013, par Xatian

  I am encountering the following error when transcoding using FFMPEG.
  It seams to me that it's an error decoding the VC1 format and has actually nothing to do with the target format (x264) I want to transcode.

  I tracked the error to this source-file :

  http://cekirdek.pardus.org.tr/ ismail/ffmpeg-docs/vc1_8c-source.html

  but I don't know how to set the profile to a value != simple.

  FFMPEG Output :

  ffmpeg version 1.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jan 16 2013 22:52:43 with gcc 4.6.3 (Gentoo 4.6.3 p1.10, pie-0.5.2)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -march=native -pipe' --extra-cflags='-O2 -march=native -pipe' --extra-cxxflags='-O2 -march=native -pipe' --disable-static --enable-gpl --enable-postproc --enable-avfilter --disable-stripping --disable-debug --disable-doc --disable-network --disable-vaapi --disable-vdpau --disable-ffplay --disable-runtime-cpudetect --enable-libx264 --disable-indev=v4l2 --disable-indev=alsa --disable-indev=oss --disable-indev=jack --disable-outdev=alsa --disable-outdev=oss --disable-outdev=sdl --enable-libfreetype --disable-amd3dnow --disable-amd3dnowext --disable-altivec --disable-avx --disable-mmxext --disable-vis --disable-neon --cpu=host --enable-hardcoded-tables
  
    libavutil      52. 13.100 / 52. 13.100
  
    libavcodec     54. 86.100 / 54. 86.100
  
    libavformat    54. 59.106 / 54. 59.106
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 32.100 /  3. 32.100
  
    libswscale      2.  1.103 /  2.  1.103
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] Old interlaced mode is not supported
  
  [NULL @ 0x1f99a90] Old WMV3 version detected, some frames may be decoded incorrectly
  
  [NULL @ 0x1f99a90] Old interlaced mode is not supported
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  Last message repeated 1 times
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  Last message repeated 1 times
  
  ======
  
  ---> This goes on forever ... skipped
  
  ======
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] Chroma scaling is not supported, expect wrong picture
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [vc1 @ 0x1f93760] max_analyze_duration 5000000 reached at 5000000
  
  [vc1 @ 0x1f93760] Could not find codec parameters for stream 0 (Video: vc1): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [vc1 @ 0x1f93760] Estimating duration from bitrate, this may be inaccurate
  
  test.vc1: could not find codec parameters

  Here is the CMD-line i use ... xD
  Basically I stripped EVERYTHING (codec-related and quality-related) because the error happens no matter what I pass ...

  ffmpeg -i test.vc1 test.mkv

• ffmpeg - library - libavformat.so.52 incorect configuration path

  4 février 2013, par florin

  I had recompiled ffmpeg on a CentOS 6.3 server.

  Everithing seams to be ok but I got next error into error_log file. :

   PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/ffmpeg.so' - libavformat.so.52: cannot open shared object file: No such file or directory in Unknown on line 0

  Here is my ffmpeg configuration :

  root@mail [~]# ffmpeg
  
  ffmpeg version N-49152-g49b729d Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jan 22 2013 22:26:36 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  
    configuration: --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-postproc --enable-nonfree --enable-pthreads --enable-libvo-aacenc --enable-postproc --enable-swscale --enable-avfilter --enable-shared --enable-runtime-cpudetect --disable-stripping --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC'
  
    libavutil      52. 15.100 / 52. 15.100
  
    libavcodec     54. 90.100 / 54. 90.100
  
    libavformat    54. 61.103 / 54. 61.103
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 33.100 /  3. 33.100
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100

  What I understand from this is that I had compiled libavformat.54 BUT in ffmpeg.so config there is libavformat.52 .... How can I fix that ?

  Thank You.