<video width="1280" height="720" controls> <source src="https://www.quirksmode.org/html5/videos/big_buck_bunny.mp4" type="video/mp4">
</video>

localadmin@Ubuntu-VirtualBox:~$ git clone https://github.com/iteufel/nwjs-ffmpeg-prebuilt.git
Cloning into 'nwjs-ffmpeg-prebuilt'...
remote: Counting objects: 314, done.
remote: Compressing objects: 100% (6/6), done.
remote: Total 314 (delta 2), reused 6 (delta 2), pack-reused 306
Receiving objects: 100% (314/314), 80.04 KiB | 347.00 KiB/s, done.
Resolving deltas: 100% (166/166), done.
localadmin@Ubuntu-VirtualBox:~$ cd nwjs-ffmpeg-prebuilt/
localadmin@Ubuntu-VirtualBox:~/nwjs-ffmpeg-prebuilt$ sudo python build_ffmpeg.py --target_arch=x64 -nw=0.30.0
[sudo] password for localadmin: 
INFO: Setting nw version to 0.30.0
INFO: Building ffmpeg for 0.30.0 on linux for x64, proprietary_codecs = False
Creating /home/localadmin/nwjs-ffmpeg-prebuilt/build directory...
INFO: Cleaning output directory...
INFO: Cloning Chromium depot tools in /home/localadmin/nwjs-ffmpeg-prebuilt/build...
Cloning into 'depot_tools'...
remote: Counting objects: 998, done
remote: Finding sources: 100% (998/998)
remote: Total 998 (delta 119), reused 559 (delta 119)
Receiving objects: 100% (998/998), 2.52 MiB | 5.06 MiB/s, done.
Resolving deltas: 100% (119/119), done.
INFO: Creating .gclient file...
Running depot tools as root is sad.
INFO: Cloning Chromium source code for nw-0.30.0 in /home/localadmin/nwjs-ffmpeg-prebuilt/build
Cloning into 'src'...
remote: Counting objects: 289009, done.
remote: Compressing objects: 100% (207892/207892), done.
remote: Total 289009 (delta 91684), reused 169686 (delta 73004), pack-reused 0
Receiving objects: 100% (289009/289009), 887.10 MiB | 7.83 MiB/s, done.
Resolving deltas: 100% (91684/91684), done.
Note: checking out '004e06da11e10bb08f6632224ae48ee3d5f7b303'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

Checking out files: 100% (292554/292554), done.
INFO: Hard source code reset to nw 0.30.0 specified version
HEAD is now at 004e06da11 nwjs master
INFO: Cleaning previous DEPS and BUILD.gn backup files...
INFO: Backing up and overwriting DEPS...
INFO: Backing up and overwriting BUILD.gn...
INFO: Installing build dependencies...
ERROR: The only supported distros are
 	Ubuntu 14.04 (trusty)
 	Ubuntu 16.04 (xenial)
 	Ubuntu 17.10 (artful)
 	Debian 8 (jessie) or later
INFO: Syncing with gclient...
Running depot tools as root is sad.
/home/localadmin/nwjs-ffmpeg-prebuilt/build/.gclient_entries missing, .gclient file in parent directory /home/localadmin/nwjs-ffmpeg-prebuilt/build might not be the file you want to use.
Syncing projects: 100% (10/10), done.                                    

________ running '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --arch=x86' in '/home/localadmin/nwjs-ffmpeg-prebuilt/build'
Installing Debian Sid i386 root image: /home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_sid_i386-sysroot
Downloading https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/15b7efb900d75f7316c6e713e80f87b9904791b1/debian_sid_i386_sysroot.tar.xz
Hook '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --arch=x86' took 12.19 secs
Running hooks:  28% ( 2/ 7) sysroot_x64
________ running '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --arch=x64' in '/home/localadmin/nwjs-ffmpeg-prebuilt/build'
Installing Debian Sid amd64 root image: /home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_sid_amd64-sysroot
Downloading https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/15b7efb900d75f7316c6e713e80f87b9904791b1/debian_sid_amd64_sysroot.tar.xz
Hook '/usr/bin/python src/build/linux/sysroot_scripts/install-sysroot.py --arch=x64' took 10.94 secs
Running hooks:  57% ( 4/ 7) clang        
________ running '/usr/bin/python src/tools/clang/scripts/update.py --if-needed' in '/home/localadmin/nwjs-ffmpeg-prebuilt/build'
Downloading https://commondatastorage.googleapis.com/chromium-browser-clang/Linux_x64/clang-325667-1.tgz .......... Done.
Running hooks: 100% ( 7/ 7) gn_linux64
________ running 'download_from_google_storage --no_resume --no_auth --bucket chromium-gn -s src/buildtools/linux64/gn.sha1' in '/home/localadmin/nwjs-ffmpeg-prebuilt/build'
0> Downloading src/buildtools/linux64/gn...
Downloading 1 files took 15.339980 second(s)
Hook 'download_from_google_storage --no_resume --no_auth --bucket chromium-gn -s src/buildtools/linux64/gn.sha1' took 15.48 secs
Running hooks: 100% (7/7), done.      
INFO: Generating ninja files...
ERROR at //build/config/linux/pkg_config.gni:103:17: Script returned non-zero exit code.
    pkgresult = exec_script(pkg_config_script, args, "value")
                ^----------
Current dir: /home/localadmin/nwjs-ffmpeg-prebuilt/build/src/out/nw/
Command: python -- /home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/config/linux/pkg-config.py -s /home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_sid_amd64-sysroot -a x64 glib-2.0 gmodule-2.0 gobject-2.0 gthread-2.0
Returned 1.
stderr:

Traceback (most recent call last):
  File "/home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/config/linux/pkg-config.py", line 233, in <module>
    sys.exit(main())
  File "/home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/config/linux/pkg-config.py", line 139, in main
    prefix = GetPkgConfigPrefixToStrip(options, args)
  File "/home/localadmin/nwjs-ffmpeg-prebuilt/build/src/build/config/linux/pkg-config.py", line 80, in GetPkgConfigPrefixToStrip
    "--variable=prefix"] + args, env=os.environ)
  File "/usr/lib/python2.7/subprocess.py", line 216, in check_output
    process = Popen(stdout=PIPE, *popenargs, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

See //build/config/linux/BUILD.gn:83:3: whence it was called.
  pkg_config("glib") {
  ^-------------------
See //build/config/compiler/BUILD.gn:198:18: which caused the file to be included.
    configs += [ "//build/config/linux:compiler" ]
                 ^------------------------------
ERROR: Traceback (most recent call last):
  File "build_ffmpeg.py", line 101, in main
    build(target_cpu)
  File "build_ffmpeg.py", line 423, in build
    subprocess.check_call('gn gen //out/nw "--args=is_debug=false is_component_ffmpeg=true target_cpu=\\\"%s\\\" is_official_build=true ffmpeg_branding=\\\"Chrome\\\""' % target_cpu, shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 190, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command 'gn gen //out/nw "--args=is_debug=false is_component_ffmpeg=true target_cpu=\"x64\" is_official_build=true ffmpeg_branding=\"Chrome\""' returned non-zero exit status 1

License: LGPL version 2.1 or later
Creating config.mak, config.h, and doc/config.texi...
Running ['make', '-j8', 'libavcodec/avcodec-57.dll', 'libavformat/avformat-57.dll', 'libavutil/avutil-55.dll']
CC      libavformat/allformats.o
CC      libavformat/avio.o
CC      libavformat/aviobuf.o
CC      libavformat/cutils.o
CC      libavformat/dump.o
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/allformats.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
CC      libavformat/file_open.o
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/allformats.o] Error 2
make: *** Attente des tâches non terminées....
CC      libavformat/flac_picture.o
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/avio.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/avio.o] Error 2
CC      libavformat/format.o
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/aviobuf.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/aviobuf.o] Error 2
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/cutils.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/cutils.o] Error 2
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/dump.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/dump.o] Error 2
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/file_open.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/file_open.o] Error 2
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/flac_picture.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/flac_picture.o] Error 2
cl▒: Ligne de commande warning D9002▒: option '/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/libavformat/format.c' inconnue ignor▒e
cl▒: Ligne de commande error D8003▒: nom de fichier de la source absent
make: *** [/home/sylvain/nwjs-ffmpeg-prebuilt/build/src/third_party/ffmpeg/common.mak:60: libavformat/format.o] Error 2
Traceback (most recent call last):
  File "./chromium/scripts/build_ffmpeg.py", line 648, in <module>
    sys.exit(main(sys.argv[1:]))
  File "./chromium/scripts/build_ffmpeg.py", line 613, in main
    configure_args)
  File "./chromium/scripts/build_ffmpeg.py", line 605, in do_build_ffmpeg
    options.config_only, branding, configure_flags)
  File "./chromium/scripts/build_ffmpeg.py", line 220, in BuildFFmpeg
    ['make', '-j%d' % parallel_jobs] + libraries, cwd=config_dir)
  File "./chromium/scripts/build_ffmpeg.py", line 95, in PrintAndCheckCall
    subprocess.check_call(argv, *args, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['make', '-j8', 'libavcodec/avcodec-57.dll', 'libavformat/avformat-57.dll', 'libavutil/avutil-55.dll']' returned non-zero exit status 2
ERROR: Traceback (most recent call last):
  File "build_ffmpeg.py", line 96, in main
    check_build_with_proprietary_codecs(proprietary_codecs, host_platform, target_arch)
  File "build_ffmpeg.py", line 464, in check_build_with_proprietary_codecs
    subprocess.check_call('./chromium/scripts/build_ffmpeg.py {0} {1}'.format(host_platform, target_arch), shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)

<video width="320" height="240" controls>
  <source src="video.mkv" type="video/matroska">
</video>

-o obj/third_party/ffmpeg/ffmpeg_internal/hevc_cabac.o -x c ../../third_party/ffmpeg/libavcodec/hevc_cabac.c 
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module '../../third_party/ffmpeg/libavcodec/hevc_cabac.c'.
4.	Running pass 'Greedy Register Allocator' on function '@ff_hevc_part_mode_decode'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 4.0.0 (trunk 282487)
Target: i386-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/nwjs_build/build_dir/ffmpeg/nwjs-ffmpeg-prebuilt/build/src/out/nw/../../third_party/llvm-build/Release+Asserts/bin
clang: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/hevc_cabac-2b36ca.c
clang: note: diagnostic msg: /tmp/hevc_cabac-2b36ca.sh
clang: note: diagnostic msg: 

********************
[408/448] CC obj/third_party/ffmpeg/ffmpeg_internal/h264qpel.o
ninja: build stopped: subcommand failed.
ERROR: Traceback (most recent call last):
  File "build_ffmpeg.py", line 98, in main
    build(target_cpu)
  File "build_ffmpeg.py", line 409, in build
    subprocess.check_call('ninja -C out/nw ffmpeg', shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command 'ninja -C out/nw ffmpeg' returned non-zero exit status 1

Writing: ./ffmpeg_generated.gni
INFO: Generating ninja files...
ERROR at //.gn:44:22: Build argument has no effect.
  v8_enable_gdbjit = false
                     ^----
The variable "v8_enable_gdbjit" was set as a build argument
but never appeared in a declare_args() block in any buildfile.

To view all possible args, run "gn args --list <builddir>"
Done. Made 42 targets from 47 files in 68ms
INFO: Starting ninja for building ffmpeg...
ninja: Entering directory `out/nw'
[150/541] LINK ./genversion
FAILED: genversion genversion.map.gz 
python "../../build/toolchain/gcc_link_wrapper.py" --output="./genversion" --map-file "./genversion.map.gz" -- ../../third_party/llvm-build/Release+Asserts/bin/clang++ -Wl,--fatal-warnings -Wl,--build-id=sha1 -fPIC -Wl,-z,noexecstack -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -Wl,--no-as-needed -lpthread -Wl,--as-needed -fuse-ld=gold -B../../third_party/binutils/Linux_x64/Release/bin -Wl,--threads -Wl,--thread-count=4 -Wl,--icf=all -flto -fwhole-program-vtables -Wl,-plugin-opt,O1 -Wl,-plugin-opt,-function-sections -m64 -pthread -Wl,-O1 -Wl,--gc-sections --sysroot=../../build/linux/debian_jessie_amd64-sysroot -L/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -Wl,-rpath-link=/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/lib/x86_64-linux-gnu -L/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -Wl,-rpath-link=/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib/x86_64-linux-gnu -L/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -Wl,-rpath-link=/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6 -L/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib -Wl,-rpath-link=/home/denimuser/Desktop/nwjs-ffmpeg-prebuilt/build/src/build/linux/debian_jessie_amd64-sysroot/usr/lib -fsanitize=cfi-vcall -Wl,-rpath-link=./lib -Wl,--disable-new-dtags -Werror -o "./genversion" -Wl,--start-group @"./genversion.rsp"  -Wl,--end-group  -ldl -lrt 
/usr/bin/ld.gold: warning: ignoring --threads: /usr/bin/ld.gold was compiled without thread support
/usr/bin/ld.gold: warning: ignoring --thread-count: /usr/bin/ld.gold was compiled without thread support
/usr/bin/ld.gold: error: treating warnings as errors
clang: error: linker command failed with exit code 1 (use -v to see invocation)
[159/541] CC obj/third_party/yasm/re2c/code.o
ninja: build stopped: subcommand failed.
ERROR: Traceback (most recent call last):
  File "build_ffmpeg.py", line 101, in main
    build(target_cpu)
  File "build_ffmpeg.py", line 396, in build
    subprocess.check_call('ninja -C out/nw ffmpeg', shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command 'ninja -C out/nw ffmpeg' returned non-zero exit status 1

INFO: Creating a GYP include file for building FFmpeg from source...
/bin/sh: 1: ./chromium/scripts/generate_gyp.py: not found
ERROR: Traceback (most recent call last):
  File "build_ffmpeg.py", line 96, in main
    check_build_with_proprietary_codecs(proprietary_codecs, host_platform, target_arch)
  File "build_ffmpeg.py", line 486, in check_build_with_proprietary_codecs
    subprocess.check_call('./chromium/scripts/generate_gyp.py', shell=True)
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command './chromium/scripts/generate_gyp.py' returned non-zero exit status 127