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• using ffmpeg to convert a video like ffprobe

  10 avril 2016, par siyanew

  I want to use ffmpeg to convert my videos to these format - exactly this ffprobe information , whats the command ?

  ffprobe version N-79139-gde1a0d4 Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    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. 19.100 / 55. 19.100
  
    libavcodec     57. 30.100 / 57. 30.100
  
    libavformat    57. 29.101 / 57. 29.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 40.102 /  6. 40.102
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    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 'Age ye rooz اگه یه روز بری سفر  (Thai Style).mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2014-02-22 22:36:49
  
    Duration: 00:02:42.21, start: 0.000000, bitrate: 280 kb/s
  
  Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 182 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 95 kb/s (default)
  
  Metadata:
  
    creation_time   : 2014-02-22 22:36:49
  
    handler_name    : IsoMedia File Produced by Google, 5-11-2011

  and

  ffprobe version N-79139-gde1a0d4 Copyright (c) 2007-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    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. 19.100 / 55. 19.100
  
    libavcodec     57. 30.100 / 57. 30.100
  
    libavformat    57. 29.101 / 57. 29.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 40.102 /  6. 40.102
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    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 'Fast Track - Simon's Cat.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2016-04-09 07:15:21
  
    Duration: 00:01:38.13, start: 0.000000, bitrate: 399 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x360 [SAR 1:1 DAR 16:9], 300 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 95 kb/s (default)
  
      Metadata:
  
        creation_time   : 2016-04-09 07:15:22
  
        handler_name    : IsoMedia File Produced by Google, 5-11-2011

• Rails Streamio FFMPEG taking a screenshot of the movie and upload with carrierwave

  5 juin 2016, par Felix

  I have got a Form where I can upload a movie. Its uploaded with carrierwave.

  In this process I want to Make a screenshot of the movie while uploading.

  How can I do this with Streamio FFMPEG.

  My code Looks like this at the moment.

  #Laedt ein Video hoch
  
  def uploadMovie
  
    @channels = Channel.all
  
    @vid = Movie.new(movies_params)
  
  
  
    @channel = Channel.find(params[:channel_id])
  
    @vid.channel = @channel
  
  
  
    if @vid.save
  
      flash[:notice] = t("flash.saved")
  
      render :add
  
    else
  
      render :add
  
    end
  
  end

  Do I have to do this in controller method or in the carrierwave uplaoder ?

  Update : I tried it this way :

  if @vid.save
  
    flash[:notice] = t("flash.saved")
  
    movieFile = FFMPEG::Movie.new(@vid.video.to_s)
  
    screenshot = movieFile.screenshot("uploads/screenshot", :seek_time => 10)
  
    render :add
  
  else

  But then I got tis error :

  s3.amazonaws.com/uploads/movie/video/6/2016-04-24_16.26.10.mp4' does not exist

• avconv : from multiple png to movie not exporting correctly

  13 avril 2016, par abhra

  I am trying to generate a mp4 movie from a set of pngs using avconv on my debian8 system. The mp4 file its generating basically looping over the first figure for some time. Here is the command I am using

  avconv -r 10 -start_number 8 -i images_%06d.png -b:v 1000k -vf scale=640 :-1 test.mp4

  Output is

  avconv version 11.6-6:11.6-1 deb8u1, Copyright (c) 2000-2014 the Libav developers built on Mar 2 2016 23:00:02 with gcc 4.9.2
  (Debian 4.9.2-10) Input #0, image2, from ’images_%06d.png’ :
  Duration : 00:00:16.00, start : 0.000000, bitrate : N/A
  Stream #0.0 : Video : png, rgb24, 2400x1801, 25 fps, 25 tbn File ’test.mp4’ already exists. Overwrite ? [y/N] y [scale @ 0x820c60] The
  ::flags= option syntax is deprecated. Use either
  : : or w=:h=:flags=. [libx264 @ 0x837760]
  using cpu capabilities : MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT
  BMI2 [libx264 @ 0x837760] profile High, level 2.2 [libx264 @ 0x837760]
  264 - core 142 r2431 a5831aa - H.264/MPEG-4 AVC codec - Copyleft
  2003-2014 - 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=12
  lookahead_threads=2 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=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr
  mbtree=1 bitrate=1000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4
  ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to ’test.mp4’ : Metadata :
  encoder : Lavf56.1.0
  Stream #0.0 : Video : libx264, yuv420p, 640x480, q=-1—1, 1000 kb/s, 10 fps, 10 tbn, 10 tbc
  Metadata :
  encoder : Lavc56.1.0 libx264 Stream mapping : Stream #0:0 -> #0:0 (png (native) -> h264 (libx264)) Press ctrl-c to stop encoding frame= 17 fps= 0 q=0.0 size= 0kB time=10000000000.00
  bitrate= 0.0kbitframe= 34 fps= 32 q=0.0 size= 0kB
  time=10000000000.00 bitrate= 0.0kbitframe= 51 fps= 32 q=0.0 size=
  0kB time=10000000000.00 bitrate= 0.0kbitframe= 393 fps= 32 q=0.0
  Lsize= 139kB time=39.00 bitrate= 29.2kbits/s video:132kB
  audio:0kB other streams:0kB global headers:0kB muxing overhead :
  5.284794% [libx264 @ 0x837760] frame I:2 Avg QP : 3.69 size : 51320 [libx264 @ 0x837760] frame P:99 Avg QP : 0.32 size : 242 [libx264
  @ 0x837760] frame B:292 Avg QP : 0.15 size : 26 [libx264 @
  0x837760] consecutive B-frames : 0.8% 0.5% 0.0% 98.7% [libx264 @
  0x837760] mb I I16..4 : 45.5% 19.2% 35.3% [libx264 @ 0x837760] mb P
  I16..4 : 0.0% 0.0% 0.0% P16..4 : 0.9% 0.0% 0.0% 0.0% 0.0%
  skip:99.0% [libx264 @ 0x837760] mb B I16..4 : 0.0% 0.0% 0.0%
  B16..8 : 0.2% 0.0% 0.0% direct : 0.0% skip:99.8% L0:22.3% L1:77.7%
  BI : 0.0% [libx264 @ 0x837760] final ratefactor : -21.09 [libx264 @
  0x837760] 8x8 transform intra:18.9% inter:41.7% [libx264 @ 0x837760]
  coded y,uvDC,uvAC intra : 34.1% 0.0% 0.0% inter : 0.1% 0.0% 0.0%
  [libx264 @ 0x837760] i16 v,h,dc,p : 81% 14% 5% 0% [libx264 @
  0x837760] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 49% 14% 36% 0% 0% 0% 0%
  0% 0% [libx264 @ 0x837760] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 36% 28% 19%
  3% 3% 2% 4% 2% 3% [libx264 @ 0x837760] i8c dc,h,v,p : 100% 0% 0%
  0% [libx264 @ 0x837760] Weighted P-Frames : Y:0.0% UV:0.0% [libx264 @
  0x837760] ref P L0 : 99.3% 0.0% 0.6% 0.1% [libx264 @ 0x837760] ref B
  L0 : 4.2% 95.8% [libx264 @ 0x837760] ref B L1 : 99.8% 0.2% [libx264 @
  0x837760] kb/s:27.34

  I have also tried

  cat *.png | avconv -f image2pipe -i - -b:v 1000k -vf scale=640 :-1 test2.mp4

  output shows

  avconv version 11.6-6:11.6-1 deb8u1, Copyright (c) 2000-2014 the Libav developers built on Mar 2 2016 23:00:02 with gcc 4.9.2
  (Debian 4.9.2-10) Codec AVOption b (set bitrate (in bits/s)) specified
  for output file #0 (test2.mp4) has not been used for any stream. The
  most likely reason is either wrong type (e.g. a video option with no
  video streams) or that it is a private option of some encoder which
  was not actually used for any stream. Output #0, image2pipe, to
  ’test2.mp4’ : Output file #0 does not contain any stream

  When getting frames fromtest.mp4

  avconv -i test.mp4 -r 30 -f image2 %04d.png

  I found 1000 or more copies of the images_000001.png.

  Would you please help, whether I have made any mistake in commands ? Or am I missing some codec options ? Thanks for the help.