[x264-devel] x264-devel Digest, Vol 68, Issue 16
chennu obulesu
obulesu.tpt at gmail.com
Fri Jan 25 05:06:58 CET 2013
Hi,
Could you please tell me the where exactaly SEI user key i can get in vlc
code.
And also please tell the below parameters where i can get.
1. diffIntraToNonIntraMBs --> Absolute difference of number of intra MBs
and number of non-intra MBs
2. numMBsInFrame --> Number of MBs in a frame
3. pSliceSizes --> the number of MBs in each slice
Advance Thanks
Obulesu BC
On Thu, Jan 24, 2013 at 10:55 PM, <x264-devel-request at videolan.org> wrote:
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> Today's Topics:
>
> 1. HEVC encoder support (Karthick Kumar)
> 2. Compiling x264 for iOS (problem report) (Alexey Kuzmin)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 24 Jan 2013 21:25:59 +0530
> From: Karthick Kumar <karthik1990r at gmail.com>
> To: x264-devel at videolan.org
> Subject: [x264-devel] HEVC encoder support
> Message-ID:
> <CALgpdToD_dsb3CyzXF=a=
> gjt7zdmN8EPjNPQSWZ9yZ1uBwOmwg at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> At present, I'm using x264 for my streaming application. I would like to
> upgrade it to HEVC encoder as my clients have the HEVC decoder support. Is
> the open source implementation of HEVC started ? Can anyone share when will
> it be ready ?
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> Message: 2
> Date: Wed, 23 Jan 2013 13:26:48 +0600
> From: Alexey Kuzmin <aukuzmin at me.com>
> To: x264-devel at videolan.org
> Subject: [x264-devel] Compiling x264 for iOS (problem report)
> Message-ID: <E9666BE4-9691-49AB-B460-20468C3EFD79 at me.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Greeting!
>
> I would like to share with some compilation problem while I was prepared
> libx264.a. Then I was linked libx264 with the ffmpeg compilation and meat
> some problem.
>
> All Steps:
>
> 1. Source downloading of the libx264
>
> > git clone git://git.videolan.org/x264.git
>
> 2. Compiling libx264 for iOS (let's say it will be for armv7s)
>
> >
> CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc
> ./configure \
> --host=arm-apple-darwin \
> --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk
> \
> --prefix=armv7s \
> --extra-cflags="-arch armv7s -mcpu=cortex-a9" \
> --extra-ldflags="-arch armv7s
> -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib/system"
> \
> --enable-static \
>
> On that step I have compiled library and includes. Compiles library I was
> copy to the /usr/local/lib and includes I was copy to the /usr/local/include
>
> 3. Source downloading of the ffmpeg
>
> > git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg
>
> 4. Some preparation for ffmpeg compilation
>
> - Installing mac ports (if not installed)
> - Installing pkgconfig (> sudo port install pkgconfig)
> - Downloading gas-preprocessor.pl and copy it to the /usr/local/bin
> - Then change permitition for gas-preprocessor.pl (> chown 777
> /usr/local/bin/gas-preprocessor.pl)
>
> So for now we are ready to compile and install ffmpeg with libx264
>
> 5. Compiling and installing ffmpeg
>
> > ./configure \
> --prefix=armv7s \
> --disable-ffmpeg \
> --disable-ffplay \
> --disable-ffprobe \
> --disable-ffserver \
> --enable-avresample \
> --enable-cross-compile \
> --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk"
> \
> --target-os=darwin \
> --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc"
> \
> --extra-cflags="-arch armv7s -mfpu=neon -miphoneos-version-min=6.0
> -I/usr/local/include" \
> --extra-ldflags="-arch armv7s -isysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk
> -miphoneos-version-min=6.0 -L/usr/local/lib" \
> --arch=arm \
> --cpu=cortex-a9 \
> --disable-asm \
> --enable-libx264 \
> --enable-gpl \
>
> > make clean && make && make install
>
> The main thing here is --enable-libx264 option and paths to the libx264 in
> --extra-cflags and --extra-ldflags
>
> 6. Putting all together
>
> - Create new Xcode project
> - Copy libraries from libx264 to the project
> - Copy libraries from ffmpeg to the project
> - In the project in the AppDelegate.m file in method
> didFinishLaunchingWithOptions I added one ffmpeg call
> avcodec_register_all();
>
> After running the project I found one warning from XCode
>
> PIE disabled. Absolute addressing (perhaps -mdynamic-no-pic) not allowed
> in code signed PIE, but used in l070 from
> /Users/aukuzmin/Projects/x264/h264/lib/libx264.a(pixel-a.o). To fix this
> warning, don't compile with -mdynamic-no-pic or link with -Wl,-no_pie
>
>
> I was trying to find out what's going on and I found next thing. When I
> was configuring libx264 it is compiling with -mdynamic-no-pic flag. I
> opened configure file and made next:
>
> And after that I compiled libx264 one more time copied lib to the
> /usr/local/lib and compiled ffmpeg one more time. Then copy compiled libs
> to the Xcode and run the demo project.
> So warning wash't dismiss.
>
> So my question is:
>
> How can I compile libx264 without any warning?
>
> P.S. My system is OS X 10.8.2, Xcode 4.5.2, iOS SDK 6.0
>
> Thank you,
> Alexey
>
>
>
>
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