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• ffmpeg filters image processing

  15 décembre 2017, par Ja_cpp

  ffmpeg is applying some filters to the images before constructing the video. Is there any way to know those filters ?

  I’m using this command (so every parameters are kept by default) :

  ffmpeg -framerate 12 -i frame%02d.jpg out.mp4

  Example of one frame :

  Image file :

  

  From the video :
  

  I’m working on image processing with c++ and I’m interested in the way ffmpeg filtering the images

  EDIT

  When I launch the command line, that what I get in the terminal :

  ffmpeg -framerate 5 -i frame%02d.jpg output.mp4
  
  
  
  
  
  ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mjpeg @ 0x23e8600] Changeing bps to 8
  
  Input #0, image2, from 'frame%02d.jpg':
  
    Duration: 00:01:40.20, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2576x1456 [SAR 1:1 DAR 23:13], 5 fps, 5 tbr, 5 tbn, 5 tbc
  
  No pixel format specified, yuvj420p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x23ec680] using SAR=1/1
  
  [libx264 @ 0x23ec680] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x23ec680] profile High, level 5.0
  
  [libx264 @ 0x23ec680] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=5 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
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p(pc), 2576x1456 [SAR 1:1 DAR 23:13], q=-1--1, 5 fps, 10240 tbn, 5 tbc
  
      Metadata:
  
        encoder         : Lavc56.60.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=  501 fps=3.8 q=-1.0 Lsize=  154288kB time=00:01:39.80 bitrate=12664.6kbits/s    
  
  video:154284kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002771%
  
  [libx264 @ 0x23ec680] frame I:3     Avg QP:17.31  size:564506
  
  [libx264 @ 0x23ec680] frame P:498   Avg QP:19.27  size:313841
  
  [libx264 @ 0x23ec680] mb I  I16..4:  0.2% 97.1%  2.7%
  
  [libx264 @ 0x23ec680] mb P  I16..4:  0.0% 46.3%  0.5%  P16..4: 12.5% 13.0%  7.7%  0.0%  0.0%    skip:20.1%
  
  [libx264 @ 0x23ec680] 8x8 transform intra:98.9% inter:73.3%
  
  [libx264 @ 0x23ec680] coded y,uvDC,uvAC intra: 99.0% 99.7% 96.0% inter: 52.0% 57.7% 37.0%
  
  [libx264 @ 0x23ec680] i16 v,h,dc,p: 17% 16% 13% 54%
  
  [libx264 @ 0x23ec680] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 12% 33%  6%  7%  6%  8%  7% 10%
  
  [libx264 @ 0x23ec680] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 13% 14% 10% 13%  9% 11%  8% 10%
  
  [libx264 @ 0x23ec680] i8c dc,h,v,p: 66% 14% 14%  5%
  
  [libx264 @ 0x23ec680] Weighted P-Frames: Y:2.0% UV:1.2%
  
  [libx264 @ 0x23ec680] ref P L0: 45.6% 16.0% 20.4% 17.6%  0.5%
  
  [libx264 @ 0x23ec680] kb/s:12613.66

• Error when trying to launch ffplay on Ubuntu server 16

  18 décembre 2019, par Nicolas

  For work I need to get a video+audio link working between a machine running Ubuntu server 16 and a client machine running Ubuntu 18.04.
  On the server side we have a webcam (with a microphone) and a speaker. The idea is that the client can see and hear what happens in front of the webcam, and can talk to whoever is next to the server.

  For this purpose, I run ffserver+ffmpeg on the server side to stream video and audio (that works, the client can see and hear what happens around the server), and the client also runs ffserver+ffmpeg on a different port, so that the server can use ffplay to hear what the client says.
  Unfortunately for some reason at the moment the server cannot run ffplay. I get the following error :

   # ffplay -probesize 32 -sync ext http://localhost:8090/camera.rm
  
     ffplay version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2003-2018 the FFmpeg developers
  
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
     configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enableopengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
     libavutil      54. 31.100 / 54. 31.100
  
     libavcodec     56. 60.100 / 56. 60.100
  
     libavformat    56. 40.101 / 56. 40.101
  
     libavdevice    56.  4.100 / 56.  4.100
  
     libavfilter     5. 40.101 /  5. 40.101
  
     libavresample   2.  1.  0 /  2.  1.  0
  
     libswscale      3.  1.101 /  3.  1.101
  
     libswresample   1.  2.101 /  1.  2.101
  
     libpostproc    53.  3.100 / 53.  3.100
  
   ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
  
   Input #0, rm, from 'http://localhost:8090/camera.rm':    0B f=0/0   
  
     Metadata:
  
       title           : 
  
       author          : 
  
       copyright       : 
  
       comment         : 
  
     Duration: 01:00:00.00, start: 0.000000, bitrate: N/A
  
       Stream #0:0: Audio: ac3 (dnet / 0x74656E64), 22050 Hz, mono, fltp, 32 kb/s
  
       Stream #0:1: Video: rv10 (RV10 / 0x30315652), yuv420p, 640x480, 2048 kb/s, 24464 fps, 24464 tbr, 1k tbn, 1k tbc
  
   SDL_OpenAudio (1 channels, 22050 Hz): 
  
   No more combinations to try, audio open failed

  To be noted : ffplay has worked in the past on this server. The only modifications that were made are that I added some feeds and streams in the ffserver.conf, but they are not even used. I tried marking my additions as comments and repeating the test, but ffplay still doesn’t work.

  My ffserver.conf file is as below :

  HTTPPort            8090
  
  HTTPBindAddress     0.0.0.0
  
  MaxHTTPConnections 200
  
  MaxClients      100
  
  MaxBandWidth    500000
  
  CustomLog       -
  
  #NoDaemon
  
  
  
  <feed>
  
  File            /tmp/camera.ffm
  
  FileMaxSize     200M
  
  </feed>
  
  
  
  #<feed>
  
  #File            /tmp/test.ffm
  
  #FileMaxSize     200k
  
  #</feed>
  
  
  
  #<feed>
  
  #File /tmp/audio.ffm>
  
  #FileMaxSize 200M
  
  #</feed>
  
  
  
  <stream>
  
  Feed camera.ffm
  
  Format rm
  
  AudioBitRate 32
  
  VideoFrameRate 15
  
  VideoIntraOnly
  
  VideoBitRate 2048
  
  VideoBufferSize 2048
  
  VideoSize 640x480
  
  VideoQMin 5
  
  VideoQMax 51
  
  Strict -1
  
  </stream>
  
  
  
  #<stream>
  
  #Feed test.ffm
  
  #AudioBitRate 32
  
  #AudioChannels 1
  
  #AudioSampleRate 44100
  
  #VideoBitRate 512
  
  #VideoBufferSize 40
  
  #VideoFrameRate 24
  
  #VideoSize 640x640
  
  #VideoGopSize 12
  
  #VideoQMin 1
  
  #VideoQMax 15
  
  #</stream>
  
  
  
  #<stream>
  
  #Feed audio.ffm
  
  #Format rm
  
  #AudioBitRate 128
  
  #NoVideo
  
  #</stream>

  And I use the following commands :

  On the server side : ffserver -f /etc/ffserver.conf

  and : ffmpeg -f v4l2 -i /dev/video0 -f alsa -ac 2 -i hw:0 http://localhost:8090/camera.ffm

  and to receive audio : ffplay -probesize 32 -sync ext http://10.1.0.244:8080/audio.ra

  And on the client side : ffserver -f /etc/ffserver.conf

  and : ffmpeg -f alsa -ac 2 -i hw:0 http://localhost:8080/audio.ffm

  The two ffserver.conf files (on server and client) are identical, apart for the port which is different (8090 on the server and 8080 on the client).

  Does anyone have any idea why ffplay won’t start on my server ?
  Thanks,
  Nicolas.

• FFMpeg Combine wav and avi to mp4

  15 avril 2016, par krisph

  I am trying to combine a wav file and a avi in to a single mp4.

  I can do this with the following via php :

                      $command = 'start /B convertvid\bin\ffmpeg -nostdin -i Temp\\temp.avi -i Temp\\temp.wav -y -filter:v scale=1920:-1 -c:v libx264 -preset ultrafast -movflags faststart -crf 31 -c:a libvo_aacenc -b:a 64k Temp\\output.mp4';

  However it takes an age to complete and i need to speed it up, i was just wondering is there anything that could be done to optimize the commands to make it faster ?

  I have tried the command using just the command line and it still takes ages...

  C:\inetpub\wwwroot\Update\>convertvid\bin\ffmpeg -i Temp\temp.
  
  avi -i Temp\temp.wav -y  -c:v libx264 -preset ultrafast -movflags faststart -crf
  
   31 -c:a libvo_aacenc -b:a 64k Temp\testhis.mp4
  
  ffmpeg version N-74645-g4c39892 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 58.100 / 56. 58.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 37.100 /  5. 37.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, avi, from 'Temp\temp.avi':
  
    Duration: 00:01:27.00, start: 0.000000, bitrate: 97 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658), yuv420p, 256
  
  0x1024 [SAR 1:1 DAR 5:2], 98 kb/s, 0.99 fps, 0.99 tbr, 0.99 tbn, 25 tbc
  
      Metadata:
  
        title           : Esa-XVID
  
  Input #1, wav, from 'Temp\temp.wav':
  
    Duration: 00:01:25.00, bitrate: 13 kb/s
  
      Stream #1:0: Audio: gsm_ms (1[0][0][0] / 0x0031), 8000 Hz, mono, s16, 13 kb/
  
  s
  
  [libx264 @ 03b9d3e0] using SAR=1/1
  
  [libx264 @ 03b9d3e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShu
  
  ffle
  
  [libx264 @ 03b9d3e0] profile Constrained Baseline, level 5.0
  
  [libx264 @ 03b9d3e0] 264 - core 148 r2597 e86f3a1 - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deb
  
  lock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_rang
  
  e=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_
  
  offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlac
  
  ed=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_m
  
  in=1 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=31.0 qcomp=0.60 qpmin=0 qpma
  
  x=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, mp4, to 'Temp\testhis.mp4':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 2560x1
  
  024 [SAR 1:1 DAR 5:2], q=-1--1, 0.99 fps, 1000k tbn, 0.99 tbc
  
      Metadata:
  
        title           : Esa-XVID
  
        encoder         : Lavc56.58.100 libx264
  
      Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 8000 Hz, mo
  
  no, s16, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc56.58.100 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (gsm_ms (native) -> aac (libvo_aacenc))
  
  Press [q] to stop, [?] for help
  
  frame=    9 fps=0.0 q=11.0 size=     528kB time=00:00:05.05 bitrate= 855.4kbits/
  
  frame=   17 fps= 16 q=9.0 size=     791kB time=00:00:13.15 bitrate= 492.9kbits/s
  
  frame=   25 fps= 16 q=10.0 size=     844kB time=00:00:21.24 bitrate= 325.6kbits/
  
  frame=   35 fps= 17 q=9.0 size=     870kB time=00:00:31.36 bitrate= 227.2kbits/s
  
  frame=   45 fps= 17 q=10.0 size=     890kB time=00:00:41.47 bitrate= 175.8kbits/
  
  frame=   56 fps= 18 q=9.0 size=     924kB time=00:00:52.60 bitrate= 143.9kbits/s
  
  frame=   67 fps= 18 q=10.0 size=     948kB time=00:01:03.73 bitrate= 121.8kbits/
  
  frame=   78 fps= 19 q=10.0 size=     989kB time=00:01:14.86 bitrate= 108.2kbits/
  
  [mp4 @ 03b9c8e0] Starting second pass: moving the moov atom to the beginning of
  
  the file
  
  frame=   85 fps= 18 q=-1.0 Lsize=    1028kB time=00:01:25.98 bitrate=  97.9kbits
  
  /s dup=9 drop=0
  
  video:912kB audio:111kB subtitle:0kB other streams:0kB global headers:0kB muxing
  
   overhead: 0.497861%
  
  [libx264 @ 03b9d3e0] frame I:1     Avg QP:28.00  size:245528
  
  [libx264 @ 03b9d3e0] frame P:84    Avg QP: 9.98  size:  8182
  
  [libx264 @ 03b9d3e0] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 03b9d3e0] mb P  I16..4:  4.1%  0.0%  0.0%  P16..4:  4.9%  0.0%  0.0%
  
   0.0%  0.0%    skip:90.9%
  
  [libx264 @ 03b9d3e0] coded y,uvDC,uvAC intra: 10.3% 8.6% 6.3% inter: 2.4% 1.8% 0
  
  .9%
  
  [libx264 @ 03b9d3e0] i16 v,h,dc,p: 80% 18%  1%  1%
  
  [libx264 @ 03b9d3e0] i8c dc,h,v,p: 64% 26% 10%  1%
  
  [libx264 @ 03b9d3e0] kb/s:86.79