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• ffmpeg : Dynamically set output duration based on sliding text width

  18 janvier 2016, par John Whiteman

  I need to create a smooth ’news ticker’ on a low powered android device. Unfortunately this is impossible at runtime using HTML or native code as there is always some stutter or glitch.

  I’ve created a solution that gives me a smooth result by encoding an mp4 for each message and displaying one video after the other. This is the code I’m using :

  ffmpeg -f lavfi -i color=c=black:s=1280x100 -vf "drawtext=BebasNeue.otf:fontsize=60:fontcolor=white:y=h-line_h-30:x=-(4*n)+1280:text='Hello world'" -t 10 output.mp4

  Problem :
  I need to set the video’s duration dynamically so that the video stops when the text has completed it’s journey from right to left. The messages will be of varying lengths and I need each message to scroll at a constant speed (ie. an mp4 with a longer message would have a longer duration).

  Is this possible via an expression ? If not is there some clever way I can calculate this outside of ffmpeg and pass it to the ’-t’ (duration) parameter ?

  ** Edit **
  To calculate outside of ffmpeg I can do a calculation like video_width + text_width / video_fps (ie. 1280 + 262 / 25) to give me the duration. So now I’m just looking to see if this is possible within the ffmpeg command line itself. t

  Many thanks

• ffmpeg file conversion unreadable [on hold]

  16 août 2015, par rashadb

  I used ffmpeg to shorten a Videohive file from 14 seconds to 5 seconds with the following entry on the command line :

  ffmpeg -i 15_Shopping_VKV.mov -t 5 shoes.mp4 

  The file doesn’t work when I try to play it with Quicktime. Along with other Google searches, I looked at the following links in Stackoverflow for suggestions :

  https://stackoverflow.com/questions/25831944/unreadable-files
  
  https://stackoverflow.com/questions/4818681/ffmpeg-conversion-error
  
  https://stackoverflow.com/questions/22307229/ffmpeg-mp4-file-is-not-valid

  At this point I’m out of ideas to figure out what’s wrong, let alone how to fix the problem.

  Here are some additional details :

  I managed to edit a few other Videohive files but each file comes in slightly different format and although I’ve converted a number of other files with a similar entry or one that adjusts the codec to something web ready, I’ve been unable to successfully convert this file. Like all of the other original videohive files it is readily read by QuickTime. Only after the conversion does this file not work. All other files I’ve converted worked with the following conversions for example :

  ffmpeg -i mainfile.mp4 -t 5:00 rave.mp4 

  OR

  ffmpeg -i 00299.mov -c:v libx264 dating.mp4

  Here are a few additional details that may help :

  1) a link to the broken file

  https://s3.amazonaws.com/files.parsetfss.com/90b6030c-d712-42ec-b2ee-deb43a4dd277/tfss-79b45914-9ada-4c1c-8fbc-8d652f8c00c7-shoes.mp4

  2) The printout of ffmpeg process

  News-MacBook-Air:CP08.14.15 newuser$ ffmpeg -i 15_Shopping_VKV.mov  -t 5  shoes.mov
  
  ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '15_Shopping_VKV.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2015-03-07 22:03:36
  
    Duration: 00:00:14.71, start: 0.000000, bitrate: 78240 kb/s
  
      Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/bt709/bt709), 1920x1080 [SAR 72:72 DAR 16:9], 78231 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:03:36
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Photo - JPEG
  
        timecode        : 00:02:36;02
  
      Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:15:55
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:02:36;02
  
  File 'shoes.mov' already exists. Overwrite ? [y/N] y
  
  No pixel format specified, yuvj422p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 0x7fbc9400a000] using SAR=1/1
  
  [libx264 @ 0x7fbc9400a000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fbc9400a000] profile High 4:2:2, level 4.0, 4:2:2 8-bit
  
  [libx264 @ 0x7fbc9400a000] 264 - core 144 r2533 c8a773e - 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=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=25 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, mov, to 'shoes.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      encoder         : Lavf56.36.100
  
      Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuvj422p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        creation_time   : 2015-03-07 22:03:36
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:02:36;02
  
        encoder         : Lavc56.41.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=  150 fps=6.9 q=-1.0 Lsize=    3953kB time=00:00:04.93 bitrate=6557.7kbits/s    
  
  video:3950kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.080847%
  
  [libx264 @ 0x7fbc9400a000] frame I:1     Avg QP:25.46  size: 71679
  
  [libx264 @ 0x7fbc9400a000] frame P:72    Avg QP:25.36  size: 40886
  
  [libx264 @ 0x7fbc9400a000] frame B:77    Avg QP:27.53  size: 13357
  
  [libx264 @ 0x7fbc9400a000] consecutive B-frames:  0.7% 89.3% 10.0%  0.0%
  
  [libx264 @ 0x7fbc9400a000] mb I  I16..4: 16.5% 80.0%  3.5%
  
  [libx264 @ 0x7fbc9400a000] mb P  I16..4:  5.3% 14.6%  0.6%  P16..4: 41.1% 10.6%  3.0%  0.0%  0.0%    skip:24.9%
  
  [libx264 @ 0x7fbc9400a000] mb B  I16..4:  0.4%  1.2%  0.0%  B16..8: 32.7%  4.0%  0.7%  direct: 2.8%  skip:58.2%  L0:36.3% L1:53.2% BI:10.5%
  
  [libx264 @ 0x7fbc9400a000] 8x8 transform intra:71.7% inter:86.5%
  
  [libx264 @ 0x7fbc9400a000] coded y,uvDC,uvAC intra: 52.7% 78.6% 18.2% inter: 14.1% 26.4% 0.4%
  
  [libx264 @ 0x7fbc9400a000] i16 v,h,dc,p: 26% 18%  5% 51%
  
  [libx264 @ 0x7fbc9400a000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 13% 20%  4%  8% 12%  6%  8%  5%
  
  [libx264 @ 0x7fbc9400a000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 15% 12%  4% 14% 14%  7%  5%  2%
  
  [libx264 @ 0x7fbc9400a000] i8c dc,h,v,p: 45% 12% 27% 16%
  
  [libx264 @ 0x7fbc9400a000] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fbc9400a000] ref P L0: 65.2% 18.5% 11.3%  5.0%
  
  [libx264 @ 0x7fbc9400a000] ref B L0: 90.7%  9.1%  0.2%
  
  [libx264 @ 0x7fbc9400a000] ref B L1: 99.1%  0.9%
  
  [libx264 @ 0x7fbc9400a000] kb/s:6463.90

• Installing full multimedia stack on server (ffmpeg,mp4box,sox,mplayer)

  29 avril 2015, par hdezela

  I’ve had a trusty text file with all(?) the steps I need to set up a full multimedia stack on a RHEL compatible server (CentOS, AWS Linux, etc.) for a few years now. However, sometimes some things are missing and I need to revise it. I know it is not complete so I’m asking for suggestions/modifications in order to get a good - and public - list of how to install all this stuff easily.

  Ideally, I want to be able to run through the file and end up with a system that’ll take any media file and be able to convert/encode/decode/whatever with it.

  This is what I have :

  yum install mesa-libGL-devel mesa-libGLU-devel libXi-devel libXmu-devel freeglut-devel freeglut ncurses-devel
  
  cd /usr/local/src
  
  mkdir /usr/local/src/tmp
  
  chmod 777 /usr/local/src/tmp
  
  export TMPDIR=/usr/local/src/tmp
  
  
  
  wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
  
  wget http://downloads.xiph.org/releases/ogg/libogg-1.3.2.tar.gz
  
  wget http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.4.tar.gz
  
  wget http://downloads.xiph.org/releases/theora/libtheora-1.1.1.tar.gz
  
  wget ftp://ftp.videolan.org/pub/videolan/x264/snapshots/last_stable_x264.tar.bz2
  
  wget http://downloads.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.3.tar.gz
  
  wget http://downloads.sourceforge.net/faac/faac-1.28.tar.gz
  
  wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
  
  wget http://webm.googlecode.com/files/libvpx-v1.3.0.zip
  
  wget http://downloads.sourceforge.net/project/yamdi/yamdi/1.9/yamdi-1.9.tar.gz
  
  wget http://rtmpdump.mplayerhq.hu/download/rtmpdump-2.3.tgz
  
  git clone https://github.com/FFmpeg/FFmpeg.git
  
  wget http://downloads.sourceforge.net/gpac/gpac-0.5.0.tar.gz
  
  wget http://downloads.sourceforge.net/gpac/gpac_extra_libs-0.5.0.tar.gz
  
  wget http://www.mplayerhq.hu/MPlayer/releases/codecs/all-20110131.tar.bz2
  
  wget http://www.mplayerhq.hu/MPlayer/releases/MPlayer-1.1.tar.xz
  
  wget https://bitbucket.org/acoustid/chromaprint/downloads/chromaprint-fpcalc-1.1-linux-x86_64.tar.gz
  
  wget http://sourceforge.net/projects/mad/files/madplay/0.15.2b/madplay-0.15.2b.tar.gz
  
  wget http://sourceforge.net/projects/mad/files/libmad/0.15.1b/libmad-0.15.1b.tar.gz
  
  wget http://sourceforge.net/projects/mad/files/libid3tag/0.15.1b/libid3tag-0.15.1b.tar.gz
  
  wget http://sourceforge.net/projects/sox/files/sox/14.4.1/sox-14.4.1.tar.gz
  
  wget http://downloads.xiph.org/releases/ao/libao-1.2.0.tar.gz
  
  wget http://downloads.sourceforge.net/twolame/twolame-0.3.13.tar.gz
  
  wget http://www.mega-nerd.com/libsndfile/files/libsndfile-1.0.25.tar.gz
  
  wget http://www.wavpack.com/wavpack-4.70.0.tar.bz2
  
  wget http://www.linuxfromscratch.org/patches/blfs/svn/libmad-0.15.1b-fixes-1.patch
  
  
  
  tar zxf yasm-1.3.0.tar.gz
  
  tar zxf libogg-1.3.2.tar.gz
  
  tar zxf libvorbis-1.3.4.tar.gz
  
  tar zxf libtheora-1.1.1.tar.gz
  
  tar jxf last_stable_x264.tar.bz2
  
  tar zxf opencore-amr-0.1.3.tar.gz
  
  tar zxf faac-1.28.tar.gz
  
  tar zxf lame-3.99.5.tar.gz
  
  unzip libvpx-v1.3.0.zip
  
  tar xzf yamdi-1.9.tar.gz
  
  tar xzf rtmpdump-2.3.tgz
  
  tar zxvf gpac-0.5.0.tar.gz
  
  tar zxvf gpac_extra_libs-0.5.0.tar.gz
  
  tar jxf all-20110131.tar.bz2
  
  tar jxf MPlayer-1.1.tar.xz
  
  tar xf chromaprint-fpcalc-1.1-linux-x86_64.tar.gz
  
  tar xf madplay-0.15.2b.tar.gz
  
  tar xf libmad-0.15.1b.tar.gz
  
  tar xf libid3tag-0.15.1b.tar.gz
  
  tar xf sox-14.4.1.tar.gz
  
  tar xf libao-1.2.0.tar.gz
  
  tar xf twolame-0.3.13.tar.gz
  
  tar xf libsndfile-1.0.25.tar.gz
  
  tar jxf wavpack-4.70.0.tar.bz2
  
  
  
  [YASM]
  
      cd /usr/local/src/yasm-1.3.0
  
      ./configure && make && make install
  
      yasm --version
  
      ldconfig
  
  [LIBOGG]
  
      cd /usr/local/src/libogg-1.3.2
  
      ./configure && make clean && make && make install
  
      ls /usr/local/lib/libogg*
  
      ldconfig
  
  [LIBVORBIS]
  
      cd /usr/local/src/libvorbis-1.3.4
  
      ./configure && make clean && make && make install
  
      ls /usr/local/lib/libvorbis*
  
      ldconfig
  
  [LIBTHEORA]
  
      cd /usr/local/src/libtheora-1.1.1
  
      ./configure && make clean && make && make install
  
      ls /usr/local/lib/libtheora*
  
      ldconfig
  
  [x264]
  
      cd /usr/local/src/x264-snapshot-[***]
  
      ./configure --enable-shared && make clean && make && make install
  
      ls /usr/local/lib/libx264*
  
      ldconfig
  
  [AMR]
  
      cd /usr/local/src/opencore-amr-0.1.3
  
      ./configure && make clean && make && make install
  
      ls /usr/local/lib/libopencore*
  
      ldconfig
  
  [FAAC]
  
      cd /usr/local/src/faac-1.28
  
      vi /usr/local/src/faac-1.28/common/mp4v2/mpeg4ip.h [ELIMINAR]:char *strcasestr(const char *haystack, const char *needle);
  
      ./configure && make && make install
  
      ls /usr/local/lib/libfaac*
  
      ldconfig
  
  [LAME]
  
      cd /usr/local/src/lame-3.99.5
  
      ./configure && make clean && make && make install
  
      ls /usr/local/lib/libmp3lame*
  
      ldconfig
  
  [GPAC+MP4BOX]
  
      cd  /sr/local/src/gpac
  
      cp -r ../gpac_extra_libs/* extra_lib/
  
      chmod +x configure
  
      ./configure
  
      make lib
  
      make apps
  
      make install-lib
  
      make install
  
      cp bin/gcc/libgpac.so /usr/lib
  
      ldconfig
  
  [LIBVPX]
  
      cd /usr/local/src/libvpx-v1.3.0
  
      ./configure --enable-vp8  --enable-pic --enable-shared && make && make install
  
      ls /usr/local/lib/libvpx*
  
      ldconfig
  
  [LIBRTMP]
  
      cd /usr/local/src/rtmpdump-2.3
  
      make SYS=posix
  
      make install
  
      ls /usr/local/lib/librtm*
  
      ldconfig
  
  [FFMPEG]
  
      cd /usr/local/src/FFmpeg
  
      export PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:/usr/local/lib/pkgconfig"
  
      ./configure  --enable-gpl --enable-version3 --enable-nonfree --enable-shared --enable-libmp3lame --enable-libx264 --enable-libfaac --enable-libvpx --enable-libvorbis --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencore-amrnb  --enable-libtheora --enable-librtmp
  
      make clean && make && make install
  
      make tools/qt-faststart
  
      cp tools/qt-faststart /usr/local/bin/
  
      ldconfig
  
      ffmpeg
  
      qt-faststart
  
  [MPLAYER]
  
      mv /usr/local/src/all-20110131 /usr/local/lib/codecs/
  
      chmod -R 755 /usr/local/lib/codecs/
  
      cd MPlayer-1-1
  
      make clean
  
      ./configure && make && make install
  
      ldconfig
  
  [YAMDI]
  
      cd /usr/local/src/yamdi-1.9
  
      gcc yamdi.c -o yamdi -O2 -Wall
  
      strip yamdi
  
      cp yamdi /usr/bin/yamdi
  
      yamdi -h
  
  [MEDIAINFO]
  
      rpm -ivh http://downloads.sourceforge.net/zenlib/libzen0-0.4.31-1.x86_64.CentOS_6.rpm
  
      rpm -ivh http://sourceforge.net/projects/mediainfo/files/binary/libmediainfo0/0.7.73/libmediainfo0-0.7.73-1.x86_64.CentOS_6.rpm
  
      rpm -ivh http://sourceforge.net/projects/mediainfo/files/binary/mediainfo/0.7.73/mediainfo-0.7.73-1.x86_64.CentOS_6.rpm
  
  [CHROMAPRINT]
  
      cp /usr/local/src/chromaprint-fpcalc-1.1-linux-x86_64/fpcalc /usr/local/bin/fpcalc
  
  [LIBAO]
  
      cd /usr/local/src/libao-1.2.0
  
      ./configure
  
      make
  
      make install
  
      ldconfig
  
  [LIBSND]
  
      cd /usr/local/src/libsndfile-1.0.25
  
      ./configure
  
      make
  
      make install
  
      ldconfig
  
  [TWOLAME]
  
      cd /usr/local/src/twolame-0.3.13
  
      ./configure
  
      make
  
      make install
  
      ldconfig
  
  [WAVPACK]
  
      cd /usr/local/src/wavpack-4.70.0
  
      ./configure
  
      make
  
      make install
  
      ldconfig
  
  [LIBMAD]
  
      cd /usr/local/src/libmad-0.15.1b
  
      patch -Np1 -i ../libmad-0.15.1b-fixes-1.patch
  
      sed "s@AM_CONFIG_HEADER@AC_CONFIG_HEADERS@g" -i configure.ac
  
      touch NEWS AUTHORS ChangeLog
  
      autoreconf -fi
  
      ./configure --enable-shared
  
      make
  
      make install
  
      ldconfig
  
  [ID3]
  
      cd /usr/local/src/libid3tag-0.15.1b
  
      ./configure --enable-shared
  
      make
  
      make install
  
      ldconfig
  
  [MADPLAY]
  
      cd /usr/local/src/madplay-0.15.2b
  
      ./configure --enable-shared
  
      make
  
      make install
  
      ldconfig
  
  [SOX]
  
      cd /usr/local/src/sox-14.4.1
  
      ./configure
  
      make -s
  
      make install
  
      ldconfig