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• Cannot use Mobile FFmpeg and LibVLCSharp together in Xamarin.Forms project

  26 février 2021, par Travis P

  I am adding video stream capture functionality to a Xamarin Forms project. I am trying to use VLC's LibVLCSharp.Forms (https://github.com/videolan/libvlcsharp) package and the Mobile ffmpeg Xamarin wrapper package, Laerdal.Xamarin.FFmpeg.* (https://github.com/Laerdal/Laerdal.Xamarin.FFmpeg.iOS). However, the internal ffmpeg library from VLC is conflicting with the ffmpeg wrapper and is built with different flags which exclude functionality that I need.

  


  For native development, it looks like you can configure a preferred library with the OTHER_LDFLAGS flag in the Pods-<your app="app">.debug.xcconfig</your> file but I don't see where to do that with Xamarin.Forms.
Source : https://github.com/tanersener/mobile-ffmpeg/wiki/Using-Multiple-FFmpeg-Implementations-In-The-Same-iOS-Application

  


  How can I configure Xamarin iOS builds to prefer the mobile ffmpeg library over the VLC ffmpeg library ? If I am able to use the mobile ffmpeg library, will it cause issues with VLC ?

  


  Here is a log message when I try to run commands with ffmpeg. As you can see, ffmpeg's internal library paths reference "vlc" :

  


  FFmpegExecute: Command: -vsync 1 -i 'rtsp://wowzaec2demo.streamlock.net/vod/mp4:bigbuckbunny_115k.mov' -force_key_frames "expr: gte(t, n_forced * 2)" -strict experimental -f segment -segment_time 00:00:02 -segment_start_number 0 -reset_timestamps 1 -c:v copy -c:a copy '[path to temp]/tmp/VideoStream/%01d-record-temp.mp4'
Loaded mobile-ffmpeg-full-gpl-x86_64-4.4-lts-20200725
INFO: ffmpeg version v4.4-dev-416
INFO:  Copyright (c) 2000-2020 the FFmpeg developers
INFO:
INFO:   built with Apple LLVM version 7.3.0 (clang-703.0.31)
INFO:   configuration: --sysroot=/Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk --prefix=/Users/taner/Projects/mobile-ffmpeg/prebuilt/ios-x86_64/ffmpeg --enable-version3 --arch=x86_64 --cpu=x86_64 --target-os=darwin --ar=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --cc=clang --cxx=clang++ --as='clang -arch x86_64 -target x86_64-ios-darwin -march=x86-64 -msse4.2 -mpopcnt -m64 -mtune=intel -DMOBILE_FFMPEG_X86_64 -Wno-unused-function -Wno-deprecated-declarations -fstrict-aliasing -DIOS -DMOBILE_FFMPEG_LTS -DMOBILE_FFMPEG_BUILD_DATE=20200725 -isysroot /Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk -O2 -mios-simulator-version-min=9.3 -I/Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk/usr/include' --ranlib=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib --strip=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/strip --disable-neon --enable-cross-compile --enable-pic --disable-asm --enable-inline-asm --enable-optimizations --enable-swscale --enable-static --disable-shared --enable-small --disable-v4l2-m2m --disable-outdev=v4l2 --disable-outdev=fbdev --disable-outdev=audiotoolbox --disable-indev=v4l2 --disable-indev=fbdev --disable-openssl --disable-xmm-clobber-test --disable-debug --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv
INFO:   WARNING: library configuration mismatch
INFO:   avutil      configuration: --extra-ldflags='-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4' --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags='-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include' --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared
INFO:   avcodec     configuration: --extra-ldflags='-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4' --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags='-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include' --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared
INFO:   avformat    configuration: --extra-ldflags='-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4' --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags='-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include' --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared
INFO:   swscale     configuration: --extra-ldflags='-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4' --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags='-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include' --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared
INFO:   libavutil      56. 55.100 / 56.  5.100
INFO:   libavcodec     58. 96.100 / 58.  6.103
INFO:   libavformat    58. 48.100 / 58.  3.100
INFO:   libavdevice    58. 11.101 / 58. 11.101
INFO:   libavfilter     7. 87.100 /  7. 87.100
INFO:   libswscale      5.  8.100 /  5.  0.101
INFO:   libswresample   3.  8.100 /  3.  8.100
ERROR: Unrecognized option 'segment_time'.
FATAL: Error splitting the argument list:
FATAL: Option not found


  


• ffmpeg - Audio not playing on iOS with transcoded video

  23 juin 2015, par Dev

  I am using Laravel 4.2.

  I am working on a project that provides video services. To transcode video (to play on all devices) I’ve used git-hub package php ffmpeg.

  By transcoding video, I found it is NOT working with iPhone 5s. I searched for solution and found some changes in parameters passed to the library.

  Finally, I come up with the command below that the library uses to transcode the video.

  ffmpeg -y -i video.mp4 -async 1 -metadata:s:v:0 start_time=0 -s 560x320 
  
      -vcodec libx264 -strict experimental -pix_fmt yuv420p -profile:v baseline 
  
      -acodec aac -profile:a aac_low -b:v 466k -refs 6 -coder 1 -sc_threshold 40 
  
      -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 
  
      -trellis 1 -b:a 256k -ac 2 transcode_video.mp4

  The video is playing well but the audio is NOT working on iOS. Hence the video is playing without audio. I am using HTML 5 player to play the video and auto play option is off.

  Any suggestions ?

• Heroku ffmpeg buildpack

  20 octobre 2015, par Manuel Quintanilla

  Putting together the video upload section in my rails app and am having some issues with video play on mobile phones. Im using

  paperclip-av-transcoder, s3 and  Heroku

  On my laptop I can visit the page and see the video thumbnails and play the videos only because I have previously installed ffmpeg to my machine.

  Remotely on Heroku I’ve set the appropriate buildpacks for ffmpeg and have run push heroku master to install the buildpacks - Now when I visit the page on my mobile iPhone I don’t get a thumbnail but when I play the video it plays - on the other hand when I visit the page on my Android phone I don’t get a thumbnail and the video dose not play but I can upload mp4s on Android.

  Check out my set up here : Heroku ffmpeg buildpacks for video uploads

  It seems I don’t have the proper buildpack setup or some other heroku setting with ffmpeg.

  Any suggestions ? Thanks in advance !