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• At least one output file must be specified

  11 mai 2015, par Desipicforu Blogspot

  I am using this command in ffmpeg

     ffmpeg -i test.flv -i /var/www/phpvibe/logo.gif -filter_complex "scale=1200:-1,overlay=0:0" -s 1280x720 -vcodec libx264 -s 640x360 -movflags test.mp4 2>&1

  But i am getting this

   string(42) "At least one output file must be specified"

  updated :-

  php code :-

   $output ='{ffmpeg-cmd} -i {input} -i /var/www/phpvibe/logo.gif -filter_complex "scale=1200:-1,overlay=0:0" -s 1280x720 -vcodec libx264 -s {ffmpeg-vsize} -threads 4 -movflags {output}.mp4 2>&1';

  Complete output :-

    array(33) {
  
    [0]=>
  
   string(83) "ffmpeg version git-2015-05-11-94c20de Copyright (c)  2000-2015 the FFmpeg developers"
  
   [1]=>
  
   string(51) "  built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)"
  
   [2]=>
  
  string(243) "  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3"
  
  [3]=>
  
    string(40) "  libavutil      54. 23.101 / 54. 23.101"
  
  [4]=>
  
  string(40) "  libavcodec     56. 38.100 / 56. 38.100"
  
  [5]=>
  
  string(40) "  libavformat    56. 32.100 / 56. 32.100"
  
  [6]=>
  
  string(40) "  libavdevice    56.  4.100 / 56.  4.100"
  
  [7]=>
  
  string(40) "  libavfilter     5. 16.101 /  5. 16.101"
  
  [8]=>
  
  string(40) "  libswscale      3.  1.101 /  3.  1.101"
  
  [9]=>
  
  string(40) "  libswresample   1.  1.100 /  1.  1.100"
  
  [10]=>
  
  string(40) "  libpostproc    53.  3.100 / 53.  3.100"
  
  [11]=>
  
  string(47) "Trailing options were found on the commandline."
  
  [12]=>
  
  string(31) "Input #0, flv, from 'test.flv':"
  
  [13]=>
  
   string(11) "  Metadata:"
  
  [14]=>
  
  string(28) "    audiosize       : 150117"
  
   [15]=>
  
   string(26) "    canSeekToEnd    : true"
  
   [16]=>
  
   string(29) "    datasize        : 1015662"
  
   [17]=>
  
   string(26) "    hasAudio        : true"
  
   [18]=>
  
   string(27) "    hasCuePoints    : false"
  
   [19]=>
  
   string(26) "    hasKeyframes    : true"
  
   [20]=>
  
   string(26) "    hasMetadata     : true"
  
   [21]=>
  
   string(26) "    hasVideo        : true"
  
   [22]=>
  
   string(24) "    lasttimestamp   : 42"
  
   [23]=>
  
   string(72) "    metadatacreator : flvtool++ (Facebook, Motion project, dweatherford)"
  
   [24]=>
  
   string(25) "    totalframes     : 229"
  
   [25]=>
  
   string(28) "    videosize       : 856032"
  
   [26]=>
  
   string(59) "  Duration: 00:00:42.27, start: 0.066000, bitrate: 192 kb/s"
  
   [27]=>
  
   string(124) "    Stream #0:0: Video: h264 (High), yuv420p, 176x144 [SAR 12:11 DAR 4:3], 165 kb/s, 30.30 fps, 29.97 tbr, 1k tbn, 59.94 tbc"
  
   [28]=>
  
   string(64) "    Stream #0:1: Audio: aac (LC), 8000 Hz, stereo, fltp, 29 kb/s"
  
   [29]=>
  
   string(48) "Input #1, gif, from '/var/www/phpvibe/logo.gif':"
  
   [30]=>
  
  string(29) "  Duration: N/A, bitrate: N/A"
  
   [31]=>
  
   string(67) "    Stream #1:0: Video: gif, bgra, 90x55, 100 tbr, 100 tbn, 100 tbc"
  
   [32]=>
  
   string(42) "At least one output file must be specified"
  
  }
  
  int(1)

• Adding the Transform video filter to ffmpeg

  1er août 2016, par aaeim

  first off I’m new to ffmpeg, and stackoverflow. so sorry If I’m doing something wrong.

  Earlier I commented on a post related to this but it got deleted because it was not an answer or something. So I’m asking my own question here.

  I followed this instructions https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  up untill Unzipping the ffmpeg file. Then I followed the facebook instructions

  1. Checkout the source for ffmpeg
  2. Copy vf_transform.c to the libavfilter subdirectory in ffmpeg source
  3. Edit libavfilter/allfilters.c and register the filter by adding the line : REGISTER_FILTER(TRANSFORM, transform, vf) ; in the video filter registration section
  4. Edit libavfilter/Makefile and add the filter to adding the line : OBJS-$(CONFIG_TRANSFORM_FILTER) += vf_transform.o in the filter section
  5. Configure and build ffmpeg as usual

  and finally I ran the remaining instructions from the compilation guide.

  I did the whole process a couple times but The result is always the same when I try to test.

  ffmpeg version N-80901-gfebc862 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Unknown filter 'transform'.

  I’m on elementary OS.
  Thx and sorry if the post is all wrong.

• Writing an image to linux framebuffer distorts the image C++

  8 avril 2021, par max

  Im trying to set up rtsp video stream from teledyne Dalsa Genie Nano camera. For grab images I'm using a framework provided by this company.
For rtsp stream I will use ffmpeg tool that can stream video directly from linux frame buffer.
  
So i tried to write this image via memcpy function and at this moment the image is not recorded correctly. because when i try to take a screenshot from Facebook with ffmpeg in output i have corrupted image.
  
Here's some information :

In the framework I have an image object that contains :

  


  

  1. void *address (address of one frame)

  


  2. int width (1280)

  


  3. int height (1024)

  


  4. int depth (1)

  


  


  So I wrote a function :


  


  It's working fine without any errors but when I print image from frame buffer (fb) I have

  


  

  


  I think it happens because fb device depth is 32 but frame depth is 1.

  


  Am I right ?

  


  I tried to change fb device depth with fbset tool but it returns an error -


  


  Command I use for taking an image from fb : sudo ffmpeg -f fbdev -framerate 1 -i /dev/fb0 -frames:v 1 screenAA3.jpeg

  


  Can someone tell me what I'm doing wrong ?