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Sur d’autres sites (12162)

  • arm/aarch64 : Use mach_absolute_time as timer on apple platforms

    12 février 2021, par Martin Storsjö
    arm/aarch64 : Use mach_absolute_time as timer on apple platforms

    This is much less precise than the cycle counter register, but
    
the cycle counter register is not available on apple platforms
    
(and on linux, it requires a kernel module for allowing user mode
    
access).
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libavutil/aarch64/timer.h
    • [DH] libavutil/arm/timer.h

  • How to build FFmpeg with Apple Symbols

    18 septembre 2021, par Meh.

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

    &#xA;

    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.

    &#xA;

    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 :

    &#xA;

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

    &#xA;

    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.

    &#xA;

    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)

    &#xA;

    Xcode version : 11.3.1 (Only has macos 10.15 SDK)

    &#xA;

  • avformat/movenc : allow Apple Lossless inside mp4

    20 novembre 2020, par Leo Izen
    avformat/movenc : allow Apple Lossless inside mp4

    The 'alac' identifier has been registered to ISO and thus towards
    
ISOBMFF at the MP4 registration authority. The existing non-MOV
    
mux mode matches the official ALAC-in-MP4 specification.
    • [DH] libavformat/movenc.c

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