ffmpeg configured with webm decode only to avoid postproc that pulls in unuse...

README.chromium

 Contains the sources used to compile FFmpeg binaries used by Google Chrome and
 Chromium.
 
 The FFmpeg source is from Alexander Strange's ffmpeg-mt branch:
   git://gitorious.org/~astrange/ffmpeg/ffmpeg-mt.git
 
   Date: Monday July 18 2010
   Commit: 82324906156d303d5f3b3e10a1855bf05614ebfc
   This corresponds to 24286 in the mainline ffmpeg repository.
 
@@ skipping 27 matching lines @@
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/03_mpeg4_video_to_elementary_stream.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/04_vc1_bsfs.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/05_respect_flac_dirac_configure.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/06_remove_decode_on_config_no_svq3.patch
        patch -p1 --no-backup-if-mismatch < ../patches/ugly/07_get_bits_overrun.patch
        patch -p1 --no-backup-if-mismatch < ../patches/ugly/08_enforce_theora_oob.patch
        patch -p1 --no-backup-if-mismatch < ../patches/ugly/09_enforce_vorbis_oob_divzero.patch
        patch -p1 --no-backup-if-mismatch < ../patches/ugly/10_aac_oob_read.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/11_mkv_buffer_overflow.patch
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/12_ogg_seek_to_zero.patch
+       patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/13_libvpx_check_decoder_only.patch
        cd ..
        
 There is also a script "make_src_tree.sh" that automates most of the steps
 above for you.  It is currently only tested on linux.
 
 NOTE: Under Windows it is recommended to use Chromium's MinGW/MSYS environment
 or 7-Zip to extract the archives.  We've experienced issues when using WinRAR.
 
 Since FFmpeg is sandboxed inside the render process, we're only interested in
 building the absolute minimum.
@@ skipping 62 matching lines @@
 #  1) Extract ffmpeg-mt, which creates the directory ffmpeg-mt:
        cd /cygdrive/c/src/chromium/deps/third_party/ffmpeg
        rm -rf ffmpeg-mt
        tar xf ffmpeg-mt.tar.gz
 #  2) Extract libswscale in place:
        cd ffmpeg-mt
        tar xf ../libswscale.tar.gz
        cd ..
        
 #  3) Apply patches:
        rm -rf orig

[scherkus (not reviewing), 2010/07/28 22:45:37]

we don't have to do this now, but perhaps we can provide a shell script that
accomplishes this?

there's a lot of duplicated commands here that could be remedied with a bash
function :)

        cp -R ffmpeg-mt orig
        cd ffmpeg-mt
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/01_static_pthread_O2.patch
        cd ..
        diff -rpu -N orig ffmpeg-mt
        diff -rpu -N orig ffmpeg-mt >patches/to_upstream/01_static_pthread_O2.patch
 
        rm -rf orig
        cp -R ffmpeg-mt orig
        cd ffmpeg-mt
@@ skipping 75 matching lines @@
        diff -rpu -N orig ffmpeg-mt >patches/to_upstream/11_mkv_buffer_overflow.patch
 
        rm -rf orig
        cp -R ffmpeg-mt orig
        cd ffmpeg-mt
        patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/12_ogg_seek_to_zero.patch
        cd ..
        diff -rpu -N orig ffmpeg-mt
        diff -rpu -N orig ffmpeg-mt >patches/to_upstream/12_ogg_seek_to_zero.patch
 
+       rm -rf orig
+       cp -R ffmpeg-mt orig
+       cd ffmpeg-mt
+       patch -p1 --no-backup-if-mismatch < ../patches/to_upstream/13_libvpx_check_decoder_only.patch
+       cd ..
+       diff -rpu -N orig ffmpeg-mt
+       diff -rpu -N orig ffmpeg-mt >patches/to_upstream/13_libvpx_check_decoder_only.patch
+
+      
 Testing
   Updates should be tested against
   http://wiki.xiph.org/TheoraTestsuite
   WebKit Layout Tests
   http://www.chromium.org/developers/testing/webkit-layout-tests
     make -j16 -r test_shell BUILDTYPE=Debug
     ./src/webkit/tools/layout_tests/run_webkit_tests.sh --debug media/\*