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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 - Images to Video

  24 mars 2014, par Mahesh

  ffmpeg -f image2 -r 15 -i images/img%03d.jpg -vcodec libx264 video.mp4

  I run this code with exec in php.

  I am not getting the output. The video.mp4 is blank.

  However if i modify this commade to something like this,

  ffmpeg -f image2 -i i.jpg -vcodec libx264 -t 15 video.mp4

  The video is running for 15 seconds.

  I tried -r 1/15. It is not working too.
  Where do i do the mistake ?

  <?php
  
  $command = "/usr/bin/ffmpeg -f image2 -r 15 -i images/img%03d.jpg -vcodec libx264 video.mp4";
  
  exec($command);
  
  ?>

  images folder has img001.jpg img002.jpg ... img005.jpg

  Array
  
  (
  
  [0] => ffmpeg version N-48645-gf3c9d8d Copyright (c) 2000-2013 the FFmpeg developers
  
  [1] =>   built on Jan  9 2013 04:08:32 with gcc 4.7 (Debian 4.7.2-5)
  
  [2] =>   configuration: --extra-cflags=-I../static/include --extra-ldflags='-L../static/lib -static' --enable-gpl --enable-version3 --enable-static --disable-shared --disable-debug --enable-runtime-cpudetect --disable-x11grab --enable-libmp3lame --enable-libx264 --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --disable-ffserver
  
  [3] =>   libavutil      52. 13.100 / 52. 13.100
  
  [4] =>   libavcodec     54. 86.100 / 54. 86.100
  
  [5] =>   libavformat    54. 59.106 / 54. 59.106
  
  [6] =>   libavdevice    54.  3.102 / 54.  3.102
  
  [7] =>   libavfilter     3. 32.100 /  3. 32.100
  
  [8] =>   libswscale      2.  1.103 /  2.  1.103
  
  [9] =>   libswresample   0. 17.102 /  0. 17.102
  
  [10] =>   libpostproc    52.  2.100 / 52.  2.100
  
  [11] => Input #0, image2, from 'images/img%03d.jpg':
  
  [12] =>   Duration: 00:00:45.00, start: 0.000000, bitrate: N/A
  
  [13] =>     Stream #0:0: Video: mjpeg, yuvj420p, 200x300 [SAR 1:1 DAR 2:3], 0.07 fps, 0.33 tbr, 0.07 tbn, 0.07 tbc
  
  [14] => [libx264 @ 0x3283080] using SAR=1/1
  
  [15] => [libx264 @ 0x3283080] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [16] => [libx264 @ 0x3283080] profile High, level 1.2
  
  [17] => [libx264 @ 0x3283080] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [18] => Output #0, mp4, to 'videos/video.mp4':
  
  [19] =>   Metadata:
  
  [20] =>     encoder         : Lavf54.59.106
  
  [21] =>     Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuvj420p, 200x300 [SAR 1:1 DAR 2:3], q=-1--1, 16384 tbn, 0.07 tbc
  
  [22] => Stream mapping:
  
  [23] =>   Stream #0:0 -> #0:0 (mjpeg -> libx264)
  
  [24] => Press [q] to stop, [?] for help
  
  [25] => Input stream #0:0 frame changed from size:200x300 fmt:yuvj420p to size:200x300 fmt:yuvj444p
  
  [26] => frame=    3 fps=0.0 q=-1.0 Lsize=      43kB time=00:00:15.00 bitrate=  23.2kbits/s
  
  [27] => video:42kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.912722%
  
  [28] => [libx264 @ 0x3283080] frame I:1     Avg QP:18.97  size: 13250
  
  [29] => [libx264 @ 0x3283080] frame P:2     Avg QP:18.68  size: 14368
  
  [30] => [libx264 @ 0x3283080] mb I  I16..4:  0.8% 81.4% 17.8%
  
  [31] => [libx264 @ 0x3283080] mb P  I16..4:  0.0% 84.8% 15.2%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip: 0.0%
  
  [32] => [libx264 @ 0x3283080] 8x8 transform intra:83.7%
  
  [33] => [libx264 @ 0x3283080] coded y,uvDC,uvAC intra: 96.4% 99.2% 97.6%
  
  [34] => [libx264 @ 0x3283080] i16 v,h,dc,p:  0%  0% 100%  0%
  
  [35] => [libx264 @ 0x3283080] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 13%  5%  8% 11%  8% 10%  7%
  
  [36] => [libx264 @ 0x3283080] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 14%  9%  7%  9% 13%  8%  7%  7%
  
  [37] => [libx264 @ 0x3283080] i8c dc,h,v,p: 45% 17% 26% 12%
  
  [38] => [libx264 @ 0x3283080] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [39] => [libx264 @ 0x3283080] kb/s:7.46

  )

• Error concatenating two files with ffmpeg ubuntu

  3 janvier 2014, par Dan Ramos

  The following command works fine in OS X :

  ffmpeg -f concat -i videos_playlist.txt -c copy final.mkv

  But when I try to run it on ubuntu i get the following :

  Unknown input format: 'concat'

  Any idea what I'm missing or a possible work around ?

  OS X build :

  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Aug  8 2013 11:49:17 with Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)

  Ubuntu build :

  ffmpeg version 0.10.8-7:0.10.8-1~precise1 Copyright (c) 2000-2013 the FFmpeg developers
  
  built on Sep  5 2013 14:56:20 with gcc 4.6.3