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• How to hide text after specific location in scroll

  18 juillet 2019, par kiara

  I have ffmpeg code which have a image overlay on top of tht. I am adding a scrolling text. Now I want this text to rotate till a specific position like breaking news on channel but I am not able to figure out the command. Can anybody help ?

  This is what I am trying

  ffmpeg -i video.mp4  -i image.png -filter_complex "[0:v]overlay=25:25,drawtext=text='abcddgfs fgshrhtr':fontfile=/usr/share/fonts/truetype/ubuntu/Ubuntu-B.ttf:y=h-line_h-110:x=w-mod(max(t-2.5\,0)*(w·25)/7.5\,(w·250)):fontcolor=red:fontsize=40:shadowx=2:shadowy=2" -t 15 -y a.mp4

• Build FFMPEG with x264 for Android

  12 novembre 2016, par Kage

  I am trying to build FFMPEG with libx264 for Android.

  I can successfully build and use FFMPEG for Android but I realized that I need the ability to encode, therefore I am trying to build FFMPEG with x264.

  I am using this tutorial to build FFmpeg for Android http://www.roman10.net/how-to-build-ffmpeg-for-android/

  When trying to build FFMPEG I get an error :

  "ERROR : libx264 not found"

  And in my log it says :

  "/usr/local/lib/libx264.a : could not read symbols : Archive has no
  index ; run ranlib to add one..."

  I have the latest versions of both FFMPEG and x264.
  I understand that FFMPEG looks for the header and libraries in usr/lib and usr/include, so in order to make it find x264 I use the cflags and ldflags :

  • —extra-cflags = " -I/usr/local/include "
  • —extra-ldflags = " -L/usr/local/lib "

  I have tried building x264 with many different options that other people on the internet have said that i need. eg. —enable-shared, —enable-static, —disable-pthreads etc.
  Some forums say enable this, others say no disable that.

  Any help would be much appreciated,
  Thanks

  EDIT :

  If I build FFmpeg with the simplest commands to include libx264 then it works.
  ie.

  ./configure --enable-gpl --enable-libx264 --extra-cflags="-I/usr/local/include" --extra-ldflags="-L/usr/local/lib" --enable-static --enable-shared

  However I need it to work for Android. The script I am using is :

  NDK=~/Desktop/android-ndk-r7
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
  
  function build_one
  
  {
  
  ./configure --target-os=linux \
  
      --prefix=$PREFIX \
  
      --enable-cross-compile \
  
      --enable-shared \
  
      --enable-static \
  
      --extra-libs="-lgcc" \
  
      --arch=arm \
  
      --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
      --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
      --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
      --sysroot=$PLATFORM \
  
      --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS -I/usr/local/include" \
  
      --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L $PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -L/usr/local/lib " \
  
      --enable-gpl \
  
      --enable-libx264 \
  
      --disable-everything \
  
      --enable-demuxer=mov \
  
      --enable-demuxer=h264 \
  
      --disable-ffplay \
  
      --enable-protocol=file \
  
      --enable-avformat \
  
      --enable-avcodec \
  
      --enable-decoder=rawvideo \
  
      --enable-decoder=mjpeg \
  
      --enable-decoder=h263 \
  
      --enable-decoder=mpeg4 \
  
      --enable-decoder=h264 \
  
      --enable-encoder=mjpeg \
  
      --enable-encoder=h263 \
  
      --enable-encoder=mpeg4 \
  
      --enable-encoder=h264 \
  
      --enable-parser=h264 \
  
      --disable-network \
  
      --enable-zlib \
  
      --disable-avfilter \
  
      --disable-avdevice \
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  
  
  make clean
  
  make  -j4 install
  
  $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
  
  $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
  
  }
  
  
  
  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
  
  PREFIX=./android/$CPU
  
  ADDITIONAL_CONFIGURE_FLAG=
  
  build_one

  I am guessing that some option in my configure command is conflicting with enabling libx264

  NOTE : If I remove —enable-libx264 then it works

• FFMPEG -VF gives me Unrecognized option VF

  18 avril 2012, par Biskoppen

  I'm trying to watermark a video using FFMPEG and -vf to overlay a PNG.. but it aint working

  My command line :

  $ffmpeg->exec('-i "' . $path_src . '" -vf "movie=watermark.png [wm] ; [in][wm] overlay=0:0 [out]" -map_chapters -1 :-1 -threads 2 -ar 44100 -ab 96k -vcodec libx264 -level 41 -crf 25 -bufsize 2000k -maxrate 2500k -r 25 -g 250 -s 720x480 ' . '-coder 1 -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +dct8x8+bpyramid -me_method umh -subq 7 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq \'blurCplx^(1-qComp)\' -bf 16 -b_strategy 1 -bidir_refine 1 -refs 6 -deblockalpha 0 -deblockbeta 0 -y "' . $path_dst . '"') ;

  Result :
  array(3) ["status"]=> int(1) ["success"]=> bool(false) ["output"]=> string(1774) "FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers built on Dec 4 2010 15:37:20 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48) configuration : —prefix=/usr —libdir=/usr/lib —shlibdir=/usr/lib —mandir=/usr/share/man —incdir=/usr/include —disable-avisynth —extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector —param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables' —enable-avfilter —enable-avfilter-lavf —enable-libdirac —enable-libfaac —enable-libfaad —enable-libfaadbin —enable-libgsm —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libx264 —enable-gpl —enable-nonfree —enable-postproc —enable-pthreads —enable-shared —enable-swscale —enable-vdpau —enable-version3 —enable-x11grab libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.19. 0 / 1.19. 0 libswscale 0.11. 0 / 0.11. 0 libpostproc 51. 2. 0 / 51. 2. 0 [aac @ 0x81a54f0]Transition from an ONLY_LONG or LONG_STOP to an EIGHT_SHORT sequence detected. If you heard an audible artifact, please submit the sample to the FFmpeg developers. Last message repeated 1 times Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/content/blabla.com/htdocs/setup/megaupload/upload/blabla/0001.mp4' : Metadata : major_brand : mp42 minor_version : 0 compatible_brands : isom Duration : 00:05:16.28, start : 0.000000, bitrate : 1598 kb/s Stream #0.0(eng) : Video : h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 1499 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc Stream #0.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 94 kb/s Unrecognized option 'vf'"