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• FFMPEG : Adding font to Video gives error

  7 juin 2016, par janki gadhiya

  I am trying to execute ffmpeg on android. I have successfully executed 2-3 commands also. But i am stuck at one point where i am adding text to the video.

  Here is the command i am executing.

  NOT WORKING : because the text argument has a space between two words.

  "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='Stack OverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

  WORKING : just removed space.

  "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='StackOverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

  Here path contains my external Sd card’s path. out.mp4 and f1.ttf exists in my folder.

  My Question is why it is not working with space.

  Here is the stack trace i am getting.

  FAILED with output : WARNING: linker: /data/data/com.github.hiteshsondhi88.sampleffmpeg/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
  
  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 4.8 (GCC)
  
  configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/x86 --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  libavutil      55. 17.103 / 55. 17.103
  
  libavcodec     57. 24.102 / 57. 24.102
  
  libavformat    57. 25.100 / 57. 25.100
  
  libavdevice    57.  0.101 / 57.  0.101
  
  libavfilter     6. 31.100 /  6. 31.100
  
  libswscale      4.  0.100 /  4.  0.100
  
  libswresample   2.  0.101 /  2.  0.101
  
  libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Testing/out.mp4':
  
  Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf57.25.100
  
  Duration: 00:00:05.00, start: 0.000000, bitrate: 117 kb/s
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 300x300 [SAR 40:33 DAR 40:33], 113 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
  Metadata:
  
  handler_name    : VideoHandler
  
  [NULL @ 0xb585f000] Unable to find a suitable output format for 'text='Stack'
  
  text='Stack: Invalid argument

  Why it is saying invalid argument. It will be great if any ffmpeg expert can guide me in what i am doing wrong here.

  I have refered this Question of SO : Text on video ffmpeg

• Libvpx unknown encoder with php exec

  5 juin 2016, par Justin Tullock

  I have centos7 with ffmpeg compiled with libvpx. I can run

  ffmpeg -i gif.gif -c:v libvpx -crf 12 -b:v 500K webm.webm

  which works perfectly but when I try the same command with php exec() it returns this :

  {array(16) { [0]=> string(66) "ffmpeg version 2.6.8 Copyright (c) 2000-2016 
  
  the FFmpeg developers" [1]=> string(55) " built with gcc 4.8.5 (GCC) 
  
  20150623 (Red Hat 4.8.5-4)" [2]=> string(1053) " configuration: --
  
  refix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --
  
  incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --
  
  arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -
  
  fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-
  
  switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-
  
  gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 -
  
  -enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --
  
  disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame 
  
  --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --
  
  enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora 
  
  --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --
  
  enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --
  
  enable-postproc --enable-pthreads --disable-static --enable-shared --enable-
  
  gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-
  
  runtime-cpudetect" [3]=> string(40) " libavutil 54. 20.100 / 54. 20.100" 
  
  [4]=> string(40) " libavcodec 56. 26.100 / 56. 26.100" [5]=> string(40) " 
  
  libavformat 56. 25.101 / 56. 25.101" [6]=> string(40) " libavdevice 56. 
  
  4.100 / 56. 4.100" [7]=> string(40) " libavfilter 5. 11.102 / 5. 11.102" 
  
  [8]=> string(40) " libavresample 2. 1. 0 / 2. 1. 0" [9]=> string(40) " 
  
  libswscale 3. 1.101 / 3. 1.101" [10]=> string(40) " libswresample 1. 1.100 / 
  
  1. 1.100" [11]=> string(40) " libpostproc 53. 3.100 / 53. 3.100" [12]=> 
  
  string(30) "Input #0, gif, from 'gif.gif':" [13]=> string(29) " Duration: 
  
  N/A, bitrate: N/A" [14]=> string(76) " Stream #0:0: Video: gif, bgra, 
  
  563x307, 25 fps, 25 tbr, 100 tbn, 100 tbc" [15]=> string(24) "Unknown 
  
  encoder 'libvpx'" } int(1)

  ffmpeg -v returns this

  ffmpeg version N-80161-g7e0623b Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  
    configuration: --enable-libvpx
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 44.100 / 57. 44.100
  
    libavformat    57. 37.101 / 57. 37.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 46.100 /  6. 46.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101

  What am I missing ?

• ffmpeg : how to determine frame rate automatically ?

  25 décembre 2016, par mrgloom

  I use this simple script to convert video to images using ffmpeg, but frame rate is fixed, how can I determine it automatically ?

  FRAME_RATE="30"
  
  SEPARATOR='/'
  
  
  
  
  
  VIDEO_PATH=$1
  
  
  
  VIDEO_BASE_DIR=`dirname $1`
  
  FRAMES_DIR=$VIDEO_BASE_DIR$SEPARATOR"Frames"
  
  rm -rf $FRAMES_DIR
  
  mkdir $FRAMES_DIR
  
  
  
  #Convert video to images
  
  ./ffmpeg -r $FRAME_RATE -i $VIDEO_PATH $FRAMES_DIR$SEPARATOR"image%d.png"

  UPDATE :

  By ffprobe I checked that my 1st video frame rate is 30.
  Also results are the same (339 frames are produced) even I reduce frame rate, so -r option doesn’t work or work in some other way ?

  These command give the same result :

  ./ffmpeg -r 10 -i $VIDEO_PATH $FRAMES_DIR$SEPARATOR"image%d"$EXTENSION
  
  ./ffmpeg -r 30 -i $VIDEO_PATH $FRAMES_DIR$SEPARATOR"image%d"$EXTENSION
  
  ./ffmpeg -i $VIDEO_PATH $FRAMES_DIR$SEPARATOR"image%d"$EXTENSION

  Output :

  ffmpeg version N-63893-gc69defd Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jul 16 2014 05:38:01 with gcc 4.6 (Debian 4.6.3-1)
  
    configuration: --prefix=/root/ffmpeg-static/64bit --extra-cflags='-I/root/ffmpeg-static/64bit/include -static' --extra-ldflags='-L/root/ffmpeg-static/64bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --enable-libvpx
  
    libavutil      52. 89.100 / 52. 89.100
  
    libavcodec     55. 66.101 / 55. 66.101
  
    libavformat    55. 43.100 / 55. 43.100
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  8.100 /  4.  8.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/user/myvideo1.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2016-01-16 05:30:03
  
    Duration: 00:00:11.33, start: 0.000000, bitrate: 4659 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480, 4539 kb/s, SAR 65536:65536 DAR 4:3, 30 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2016-01-16 05:30:03
  
        handler_name    : VideoHandle
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-01-16 05:30:03
  
        handler_name    : SoundHandle
  
  Output #0, image2, to '/home/user/Frames/image%d.png':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      encoder         : Lavf55.43.100
  
      Stream #0:0(eng): Video: png, rgb24, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 30 fps, 90k tbn, 30 tbc (default)
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2016-01-12 05:38:03
  
        handler_name    : VideoHandle
  
        encoder         : Lavc55.66.101 png
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> png (png))
  
  Press [q] to stop, [?] for help
  
  frame=  339 fps= 68 q=0.0 Lsize=N/A time=00:00:11.30 bitrate=N/A    
  
  video:195852kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown