omxplayer: Explain inclusion of ffmpeg

Signed-off-by: Paul Barker <pbarker@toganlabs.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/recipes-multimedia/omxplayer/omxplayer_git.bb b/recipes-multimedia/omxplayer/omxplayer_git.bb
index 8079a40..db01d74 100644
--- a/recipes-multimedia/omxplayer/omxplayer_git.bb
+++ b/recipes-multimedia/omxplayer/omxplayer_git.bb
@@ -11,7 +11,16 @@ DEPENDS = "libpcre libav virtual/egl boost freetype dbus openssl samba libssh li
 PR = "r4"
 
 SRCREV_default = "b8ff59dccd9307f10dad71bec2525a95bd6c603b"
+
+# omxplayer builds its own copy of ffmpeg from source instead of using the
+# system's ffmpeg library. This isn't ideal but it's ok for now. We do however
+# want to keep control of the exact version of ffmpeg used instead of just
+# fetching the latest commit on a release branch (which is what the checkout job
+# in Makefile.ffmpeg in the omxplayer source tree does).
+#
+# This SRCREV corresponds to the v3.1.10 release of ffmpeg.
 SRCREV_ffmpeg = "afa34cb36edca0ff809b7e58474bbce12271ecba"
+
 SRC_URI = "git://github.com/popcornmix/omxplayer.git;protocol=git;branch=master \
            git://source.ffmpeg.org/ffmpeg;branch=release/3.1;protocol=git;depth=1;name=ffmpeg;destsuffix=git/ffmpeg \
            file://0001-Remove-Makefile.include-which-includes-hardcoded.patch \