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• ffmpeg overlay image and lower transparency

  15 juin 2017, par JohanR

  I have this ffmpeg command that I use to create a video from a photo and a animated GIF border overlay, and a audio track.

  ffmpeg -framerate 15 -loop 1 -i photo.jpg -ignore_loop 0 -i overlay.gif -filter_complex "scale=(iw*sar)*max(600/(iw*sar)\,750/ih):ih*max(600/(iw*sar)\,750/ih), crop=600:750, overlay" -i audio.wav -c:v libx264 -c:a aac -b:a 192k -shortest output.mp4

  What I want is to lower the opacity of the overlay image.

  I have checked a lot of threads, but I can’t figure out how to combine something like this with my existing filters.

   -filter_complex "blend=all_mode='overlay':all_opacity=0.7" 

  Any ideas ?

  ---

  Here’s the full ffmpeg output of one of my tests :

  ffmpeg -framerate 15 -loop 1 -i photo.jpg -ignore_loop 0 -i overlay.gif -filter_complex "scale=(iw*sar)*max(600/(iw*sar)\,750/ih):ih*max(600/(iw*sar)\,750/ih), crop=600:750, blend=all_mode='overlay':all_opacity=0.7" -i audio.wav -c:v libx264 -c:a aac -b:a 192k -shortest output.mp4
  
  
  
  ffmpeg version N-83507-g8fa18e0 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enabl
  
  e-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
  
  -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspe
  
  ex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
  
  -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 47.100 / 55. 47.100
  
    libavcodec     57. 80.100 / 57. 80.100
  
    libavformat    57. 66.102 / 57. 66.102
  
    libavdevice    57.  2.100 / 57.  2.100
  
    libavfilter     6. 73.100 /  6. 73.100
  
    libswscale      4.  3.101 /  4.  3.101
  
    libswresample   2.  4.100 /  2.  4.100
  
    libpostproc    54.  2.100 / 54.  2.100
  
  Input #0, image2, from 'photo.jpg':
  
    Duration: 00:00:00.07, start: 0.000000, bitrate: 15374 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 400x600 [SAR 72:72 DAR 2:3], 15 fps, 15 tbr, 15 tbn, 15 tbc
  
  Input #1, gif, from 'overlay.gif':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: gif, bgra, 600x750, 5.42 fps, 5 tbr, 100 tbn, 100 tbc
  
  Guessed Channel Layout for Input Stream #2.0 : mono
  
  Input #2, wav, from 'audio.wav':
  
    Duration: 00:00:23.00, bitrate: 705 kb/s
  
      Stream #2:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
  
  [swscaler @ 00000000023300a0] deprecated pixel format used, make sure you did set range correctly
  
  [swscaler @ 000000000234d1e0] deprecated pixel format used, make sure you did set range correctly
  
  [Parsed_blend_2 @ 00000000022fd0c0] First input link top parameters (size 600x750, SAR 1:1) do not match the corresponding second input link bottom parameters (600x750, SAR 0:1)
  
  [Parsed_blend_2 @ 00000000022fd0c0] Failed to configure output pad on Parsed_blend_2
  
  Error configuring complex filters.
  
  Invalid argument

• DIY video file streaming from linux/osx to iOS devices

  27 septembre 2016, par sfactor

  This is for a hobby project. I want to learn about video streaming and also create something that’s useful for me as well.

  The project should be able to run a server on my macbook and a client on my iPad that will allow me to watch the videos I’ve got stored on my laptop without having to copy them in my iPad over my wifi.

  I know there are solutions like Plex, Air Video etc. that allow me to do it. But since my goal is to practice writing some client/server code, I want to create something myself with the basic functionality of these apps.

  I figured I’d probably need something like ffmpeg and Apple’s HTTP Live Streaming (HLS), but I don’t have a Apple developer account to be able to use it. I do have Xcode in my mac. So, some free 3rd party library for HLS or something equivalent. I also fond this tool called https://www.bento4.com.

  How would I go about getting started with such an application and what are the libraries I could use to accomplish this ?

• Error when compiling FAAC for iOS

  6 novembre 2014, par 谢小进

  I want to compile FAAC for iOS, including i386, x86_64, armv7, armv7s, arm64. I am using this shell script and when I run it, only i386 and x86_64 are built. The current code is like this :

  #!/bin/sh
  
  
  
  # OS X Mavericks, Xcode 5.1
  
  
  
  set -ex
  
  
  
  VERSION="1.28"
  
  CURRPATH=`pwd`
  
  SOURCE="faac-$VERSION"
  
  DSTDIR="libfaac"
  
  SDKVERSION="7.1"
  
  ARCHS="i386 x86_64 armv7 armv7s arm64"
  
  DEVELOPER="/Applications/Xcode.app/Contents/Developer"
  
  
  
  rm -rf $DSTDIR
  
  mkdir $DSTDIR
  
  
  
  tar jxf $SOURCE.tar.gz
  
  cd $SOURCE
  
  
  
  for ARCH in $ARCHS; do
  
      mkdir -p $CURRPATH/$DSTDIR/$ARCH
  
  
  
      if [ $ARCH == "i386" -o $ARCH == "x86_64" ]; then
  
          PLATFORM="iPhoneSimulator"
  
          if [ $ARCH = "i386" ]; then
  
              HOST="--host=i386-apple-darwin"
  
          fi
  
      else
  
          PLATFORM="iPhoneOS"
  
          HOST="--host=arm-apple-darwin"
  
      fi
  
  
  
      SDK="$DEVELOPER/Platforms/$PLATFORM.platform/Developer/SDKs/$PLATFORM$SDKVERSION.sdk"
  
      IOSMV="-miphoneos-version-min=7.0"
  
      export CC="$DEVELOPER/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
  
      export CFLAGS="$IOSMV -arch $ARCH"
  
      export LDFLAGS="$IOSMV -arch $ARCH -isysroot $SDK"
  
      export LIBS="-L$SDK/usr/lib"
  
      export CXXFLAGS="$IOSMV -arch $ARCH -I$SDK/usr/include"
  
  
  
      ./configure \
  
      $HOST \
  
      --prefix=$CURRPATH/$DSTDIR/$ARCH
  
  
  
      make && make install && make clean
  
  done
  
  
  
  cd ..
  
  mkdir -p $DSTDIR/lib
  
  
  
  lipo -create `find $DSTDIR -name libfdk-aac.a` -output $DSTDIR/lib/libfdk-aac.a
  
  
  
  cp -rf $DSTDIR/$ARCH/include $DSTDIR
  
  
  
  for ARCH in $ARCHS; do
  
      rm -rf $DSTDIR/$ARCH
  
  done

  Can somebody tell me why armv7, armv7s, arm64 are not built correct ? If needed, where can I change them ? Maybe it could be like -host= value. but I have used -host=armv7-apple-darwin, -host=armv7s-apple-darwin, and -host=arm64-apple-darwin, it’s not correct either.