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• Browser downloads video stream instead of playing it

  25 février 2019, par ilmix

  I’m trying to stream video from IP camera to browser using ffmpeg and ffserver but if I try to open stream in any browser it starts downloading it instead of playing. I’ve tried to display video using <video></video> tag but that doesn’t work either : Here is the code I used :

   <video width="800" height="600" controls="controls">
  
          <source src="http://10.10.7.19:8090/cam4.mp4" type="video/mp4">
  
   </source></video>

  The stream works fine in vlc, it is H.264 stream. ffserver shows buffer underflow errors when I try to view it in chrome.
  When I try to open it in firefox I get No video with supported format and MIME type found error on video element.

  How do I make it work ? Also, are there any tools for debugging video streams on Chrome or Firefox (console doesn’t show any errors) ?

• Révision 20617 : Habillage visuel tiré du plugin

  31 mai 2013, par cedric -

  http://zone.spip.org/trac/spip-zone/browser/_plugins_/details_interface_3/
  (hormis bandeau de navigation, et ombres sous les listes)
  + css bugfixes

• How to resolve FFmpeg undefined symbols error when using libavformat in Dolphin

  24 septembre 2021, par Meh.

  MOVED FROM : https://superuser.com/questions/1676856/how-to-build-ffmpeg-with-apple-symbols?noredirect=1#comment2572799_1676856

  


  I'm trying to build FFmpeg 3.2.4 with OpenSSL >= 2.0.7 (3.0.0) from source so I can use it's binaries to build Dolphin-Emu.

  


  I just do this : ./configure --enable-gnutls and when I build with make -j5 (-j5 speeds up the process) then make install. When I use it in compiling Dolphin , I get an error somewhat like this :

  


  Undefined symbols for architecture x86_64:
  "_kCVImageBufferColorPrimaries_ITU_R_709_2", referenced from:
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
  "_kVDADecoderConfiguration_SourceFormat", referenced from:
  "_kCVImageBufferTransferFunction_ITU_R_2020", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda_h264.o)
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
  "_kVDADecoderConfiguration_avcCData", referenced from:
  "_CMBlockBufferCopyDataBytes", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda_h264.o)
      _vtenc_frame in libavcodec.a(videotoolboxenc.o)
  "_kCVImageBufferYCbCrMatrixKey", referenced from:
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
      _vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
  "_SSLSetCertificate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_CMTimeMake", referenced from:
      _vtenc_send_frame in libavcodec.a(videotoolboxenc.o)
  "_kCVPixelBufferWidthKey", referenced from:
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
  "_VDADecoderCreate", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda_h264.o)
  "_kVTProfileLevel_H264_High_4_2", referenced from:
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
  "_kCVPixelBufferIOSurfacePropertiesKey", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda_h264.o)
  "_kVTProfileLevel_H264_Baseline_1_3", referenced from:
      _vtenc_init in libavcodec.a(videotoolboxenc.o)
(example)


  


  These _kV(blahblahblah) symbols are provided by Apple... under <coremedia></coremedia>CoreMedia.h> so my mac should DEFINITELY have this. OpenSSL version is 3.0.0 as there's an error about _SSLSetCertificate not existing.

  


  Does anyone have any ideas why this is throwing undefined symbols for existing symbols ? (My FFmpeg is compiled by clang whenever I use make, and I use gnutls(installed by brew) which should rely on openssl3.0)

  


  Xcode version : 11.3.1 (Only has macos 10.15 SDK)

  


  Linker command to link Dolphin and FFmpeg w/ OpenSSL binaries/libs

  


  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -O3 -DNDEBUG -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -mmacosx-version-min=10.14.0 -Wl,-search_paths_first -Wl,-headerpad_max_install_names -L/usr/local/lib -Wl,-dead_strip,-dead_strip_dylibs CMakeFiles/dolphin-nogui.dir/Platform.cpp.o CMakeFiles/dolphin-nogui.dir/PlatformHeadless.cpp.o CMakeFiles/dolphin-nogui.dir/MainNoGUI.cpp.o -o ../../../Binaries/dolphin-emu-nogui  ../Core/libcore.a ../UICommon/libuicommon.a ../../../Externals/cpp-optparse/libcpp-optparse.a ../VideoBackends/Null/libvideonull.a ../VideoBackends/OGL/libvideoogl.a ../VideoBackends/Software/libvideosoftware.a ../VideoBackends/Vulkan/libvideovulkan.a ../VideoCommon/libvideocommon.a ../Core/libcore.a ../VideoBackends/Null/libvideonull.a ../VideoBackends/OGL/libvideoogl.a ../VideoBackends/Software/libvideosoftware.a ../VideoBackends/Vulkan/libvideovulkan.a ../VideoCommon/libvideocommon.a ../AudioCommon/libaudiocommon.a /usr/local/lib/libpulse.dylib ../../../Externals/soundtouch/libSoundTouch.a ../../../Externals/FreeSurround/libFreeSurround.a ../../../Externals/cubeb/libcubeb.a -framework AudioUnit -framework CoreAudio -framework CoreServices ../DiscIO/libdiscio.a /usr/lib/libbz2.dylib ../../../Externals/liblzma/liblzma.a ../../../Externals/zstd/libzstd.a ../InputCommon/libinputcommon.a -framework Carbon -framework ForceFeedback /usr/local/lib/libSDL2.dylib -framework Cocoa ../../../Externals/SFML/libsfml-network.a ../../../Externals/SFML/libsfml-system.a ../../../Externals/LZO/liblzo2.a -framework CoreServices -framework IOBluetooth ../../../Externals/mGBA/mgba/libmgba.a -framework Foundation -lm ../../../Externals/hidapi/libhidapi.a ../../../Externals/glslang/libglslang.a ../../../Externals/xxhash/libxxhash.a ../../../Externals/imgui/libimgui.a /usr/local/lib/libavformat.a /usr/local/lib/libavcodec.a /usr/local/lib/libswscale.a /usr/local/lib/libavutil.a ../Common/libcommon.a ../../../Externals/enet/libenet.a ../../../Externals/mbedtls/library/libmbedtls.a ../../../Externals/mbedtls/library/libmbedx509.a ../../../Externals/mbedtls/library/libmbedcrypto.a /usr/lib/libcurl.dylib /usr/lib/libiconv.dylib ../../../Externals/libpng/libpng.a -framework AppKit ../../../Externals/miniupnpc/libminiupnpc.a ../../../Externals/pugixml/libpugixml.a ../../../Externals/fmt/libfmt.a ../../../Externals/Bochs_disasm/libbdisasm.a ../../../Externals/libusb/libusb.a -framework CoreFoundation -framework IOKit /usr/lib/libobjc.dylib ../../../Externals/minizip/libminizip.a /usr/lib/libz.dylib ../../../Externals/discord-rpc/src/libdiscord-rpc.a -lpthread -framework AppKit