[Buildroot] Add ffmpeg support

[Buildroot] Add ffmpeg support

[Luca Ceresoli]

FFmpeg is a complete, cross-platform solution to record, convert and stream
audio and video. It includes libavcodec - the leading audio/video codec library.

This patchset adds support for building ffmpeg in buildroot.

Most high-level options are provided via kconfig options, and there is a hook
in the last commit to allow passing .configure any parameters not directly
supported (very handy for machine support, for example).

Note that this support is much more complete than the one in bug 401
(https://bugs.busybox.net/show_bug.cgi?id=401).

Thanks,
Luca

ffmpeg: add new package
ffmpeg: add commandline programs
ffmpeg: allow customization of codecs, (de)muxers and other components
ffmpeg: add user-defined configure parameters

 CHANGES                                            |    2 +-
 package/multimedia/Config.in                       |    1 +
 package/multimedia/ffmpeg/Config.in                |  145 +++++++++++++++++++
 .../ffmpeg-0.5.2-fix-sdl-config-search.patch       |   17 +++
 package/multimedia/ffmpeg/ffmpeg.mk                |  150 ++++++++++++++++++++
 5 files changed, 314 insertions(+), 1 deletions(-)

Luca

[Buildroot] [PATCH 1/4] ffmpeg: add new package

[Luca Ceresoli]

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
---
 CHANGES                             |    2 +-
 package/multimedia/Config.in        |    1 +
 package/multimedia/ffmpeg/Config.in |   25 +++++++++++
 package/multimedia/ffmpeg/ffmpeg.mk |   79 +++++++++++++++++++++++++++++++++++
 4 files changed, 106 insertions(+), 1 deletions(-)
 create mode 100644 package/multimedia/ffmpeg/Config.in
 create mode 100644 package/multimedia/ffmpeg/ffmpeg.mk

diff --git a/CHANGES b/CHANGES
index 3ba7195..6ca4fc9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,7 +4,7 @@
 
 	New GTK-based configurator, usable using 'make gconfig'.
 
-	New packages: cgilua, copas, coxpcall, luafilesystem,
+	New packages: cgilua, copas, coxpcall, ffmpeg, luafilesystem,
 	luasocket, rings, wsapi, xavante
 
 	Updated/fixed packages: cdrkit, file, gawk, gstreamer, intltool,
diff --git a/package/multimedia/Config.in b/package/multimedia/Config.in
index 3305f7b..3b0eec5 100644
--- a/package/multimedia/Config.in
+++ b/package/multimedia/Config.in
@@ -3,6 +3,7 @@ source "package/multimedia/alsa-lib/Config.in"
 source "package/multimedia/alsa-utils/Config.in"
 source "package/multimedia/aumix/Config.in"
 source "package/multimedia/flac/Config.in"
+source "package/multimedia/ffmpeg/Config.in"
 source "package/multimedia/gstreamer/Config.in"
 source "package/multimedia/gst-plugins-base/Config.in"
 source "package/multimedia/gst-plugins-good/Config.in"
diff --git a/package/multimedia/ffmpeg/Config.in b/package/multimedia/ffmpeg/Config.in
new file mode 100644
index 0000000..bc8fb22
--- /dev/null
+++ b/package/multimedia/ffmpeg/Config.in
@@ -0,0 +1,25 @@
+menuconfig BR2_PACKAGE_FFMPEG
+	bool "ffmpeg"
+	help
+         FFmpeg is a complete, cross-platform solution to record, convert
+         and stream audio and video.
+
+	 http://www.ffmpeg.org
+
+if BR2_PACKAGE_FFMPEG
+
+config BR2_PACKAGE_FFMPEG_GPL
+	bool "Enable GPL code"
+	default n
+	help
+         allow use of GPL code, the resulting libs and binaries will
+         be under GPL
+
+config BR2_PACKAGE_FFMPEG_NONFREE
+	bool "Enable nonfree code"
+	default n
+	help
+         allow use of nonfree code, the resulting libs and binaries
+         will be unredistributable
+
+endif
diff --git a/package/multimedia/ffmpeg/ffmpeg.mk b/package/multimedia/ffmpeg/ffmpeg.mk
new file mode 100644
index 0000000..b4abefb
--- /dev/null
+++ b/package/multimedia/ffmpeg/ffmpeg.mk
@@ -0,0 +1,79 @@
+#############################################################
+#
+# ffmpeg
+#
+#############################################################
+FFMPEG_VERSION := 0.5.2
+FFMPEG_SOURCE := ffmpeg-$(FFMPEG_VERSION).tar.bz2
+FFMPEG_SITE := http://ffmpeg.org/releases
+FFMPEG_INSTALL_STAGING = YES
+FFMPEG_INSTALL_TARGET = YES
+
+FFMPEG_CONF_OPT = \
+	--prefix=/usr		\
+	--enable-shared 	\
+	--disable-ffmpeg	\
+	--disable-ffplay	\
+	--disable-ffserver	\
+	--disable-avfilter	\
+	--disable-postproc	\
+	--disable-swscale	\
+	--disable-vhook		\
+
+ifeq ($(BR2_PACKAGE_FFMPEG_GPL),y)
+FFMPEG_CONF_OPT += --enable-gpl
+else
+FFMPEG_CONF_OPT += --disable-gpl
+endif
+
+ifeq ($(BR2_PACKAGE_FFMPEG_NONFREE),y)
+FFMPEG_CONF_OPT += --enable-nonfree
+else
+FFMPEG_CONF_OPT += --disable-nonfree
+endif
+
+ifeq ($(BR2_PTHREADS_NONE),y)
+FFMPEG_CONF_OPT += --disable-pthreads
+else
+FFMPEG_CONF_OPT += --enable-pthreads
+endif
+
+ifeq ($(BR2_INET_IPV6),y)
+FFMPEG_CONF_OPT += --enable-ipv6
+else
+FFMPEG_CONF_OPT += --disable-ipv6
+endif
+
+ifeq ($(BR2_PACKAGE_ZLIB),y)
+FFMPEG_CONF_OPT += --enable-zlib
+FFMPEG_DEPENDENCIES += zlib
+else
+FFMPEG_CONF_OPT += --disable-zlib
+endif
+
+# Override FFMPEG_CONFIGURE_CMDS: FFmpeg does not support --target and others
+define FFMPEG_CONFIGURE_CMDS
+	(cd $(FFMPEG_SRCDIR) && rm -rf config.cache && \
+	$(TARGET_CONFIGURE_OPTS) \
+	$(TARGET_CONFIGURE_ARGS) \
+	$(TARGET_CONFIGURE_ENV) \
+	$(FFMPEG_CONF_ENV) \
+	./configure \
+		--enable-cross-compile	\
+		--cross-prefix=$(TARGET_CROSS) \
+		--sysroot=$(STAGING_DIR) \
+		--host-cc=$(HOSTCC) \
+		--cc=$(TARGET_CC) \
+		--arch=$(BR2_ARCH) \
+		--extra-cflags=-fPIC \
+		$(DISABLE_NLS) \
+		$(DISABLE_LARGEFILE) \
+		$(DISABLE_IPV6) \
+		$(FFMPEG_CONF_OPT) \
+	)
+endef
+
+# Override FFMPEG_INSTALL_TARGET_OPT: FFmpeg does not support install-strip
+FFMPEG_INSTALL_TARGET_OPT = DESTDIR=$(TARGET_DIR) install
+
+$(eval $(call AUTOTARGETS,package/multimedia,ffmpeg))
-- 
1.7.0.4

[Buildroot] [PATCH 2/4] ffmpeg: add commandline programs

[Luca Ceresoli]

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
---
 package/multimedia/ffmpeg/Config.in                |   25 ++++++++++++++++++++
 .../ffmpeg-0.5.2-fix-sdl-config-search.patch       |   17 +++++++++++++
 package/multimedia/ffmpeg/ffmpeg.mk                |   23 ++++++++++++++++--
 3 files changed, 62 insertions(+), 3 deletions(-)
 create mode 100644 package/multimedia/ffmpeg/ffmpeg-0.5.2-fix-sdl-config-search.patch

diff --git a/package/multimedia/ffmpeg/Config.in b/package/multimedia/ffmpeg/Config.in
index bc8fb22..736a8ec 100644
--- a/package/multimedia/ffmpeg/Config.in
+++ b/package/multimedia/ffmpeg/Config.in
@@ -22,4 +22,29 @@ config BR2_PACKAGE_FFMPEG_NONFREE
          allow use of nonfree code, the resulting libs and binaries
          will be unredistributable
 
+config BR2_PACKAGE_FFMPEG_FFMPEG
+	bool "Build ffmpeg (the command line application)"
+	default y
+	help
+         FFmpeg is a very fast video and audio converter.
+         It can also grab from a live audio/video source.
+
+         It is not needed if you want to link the FFmpeg libraries
+         to your application.
+
+config BR2_PACKAGE_FFMPEG_FFPLAY
+	bool "Build ffplay"
+	select BR2_PACKAGE_SDL
+	default n
+	help
+         FFplay is a very simple and portable media player using the
+         FFmpeg libraries and the SDL library.
+         It is mostly used as a testbed for the various FFmpeg APIs.
+
+config BR2_PACKAGE_FFMPEG_FFSERVER
+	bool "Build ffserver"
+	default n
+	help
+         FFserver is a streaming server for both audio and video.
+
 endif
diff --git a/package/multimedia/ffmpeg/ffmpeg-0.5.2-fix-sdl-config-search.patch b/package/multimedia/ffmpeg/ffmpeg-0.5.2-fix-sdl-config-search.patch
new file mode 100644
index 0000000..58d08aa
--- /dev/null
+++ b/package/multimedia/ffmpeg/ffmpeg-0.5.2-fix-sdl-config-search.patch
@@ -0,0 +1,17 @@
+Allow FFmpeg's ./configure script to use a custom sdl-config command.
+
+Inspired from:
+http://www.mail-archive.com/uclinux-dist-commits at blackfin.uclinux.org/msg01099.html
+
+diff -u ffmpeg-0.5.2-orig/configure ffmpeg-0.5.2/configure
+--- a/configure
++++ b/configure
+@@ -2066,7 +2066,7 @@
+ 
+ disable sdl_too_old
+ disable sdl
+-SDL_CONFIG="${cross_prefix}sdl-config"
++SDL_CONFIG="${SDL_CONFIG-${cross_prefix}sdl-config}"
+ if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
+     sdl_cflags=`"${SDL_CONFIG}" --cflags`
+     temp_cflags $sdl_cflags
diff --git a/package/multimedia/ffmpeg/ffmpeg.mk b/package/multimedia/ffmpeg/ffmpeg.mk
index b4abefb..0af08e5 100644
--- a/package/multimedia/ffmpeg/ffmpeg.mk
+++ b/package/multimedia/ffmpeg/ffmpeg.mk
@@ -12,9 +12,6 @@ FFMPEG_INSTALL_TARGET = YES
 FFMPEG_CONF_OPT = \
 	--prefix=/usr		\
 	--enable-shared 	\
-	--disable-ffmpeg	\
-	--disable-ffplay	\
-	--disable-ffserver	\
 	--disable-avfilter	\
 	--disable-postproc	\
 	--disable-swscale	\
@@ -32,6 +29,26 @@ else
 FFMPEG_CONF_OPT += --disable-nonfree
 endif
 
+ifeq ($(BR2_PACKAGE_FFMPEG_FFMPEG),y)
+FFMPEG_CONF_OPT += --enable-ffmpeg
+else
+FFMPEG_CONF_OPT += --disable-ffmpeg
+endif
+
+ifeq ($(BR2_PACKAGE_FFMPEG_FFPLAY),y)
+FFMPEG_DEPENDENCIES += sdl
+FFMPEG_CONF_OPT += --enable-ffplay
+FFMPEG_CONF_ENV += SDL_CONFIG=$(STAGING_DIR)/usr/bin/sdl-config
+else
+FFMPEG_CONF_OPT += --disable-ffplay
+endif
+
+ifeq ($(BR2_PACKAGE_FFMPEG_FFSERVER),y)
+FFMPEG_CONF_OPT += --enable-ffserver
+else
+FFMPEG_CONF_OPT += --disable-ffserver
+endif
+
 ifeq ($(BR2_PTHREADS_NONE),y)
 FFMPEG_CONF_OPT += --disable-pthreads
 else
-- 
1.7.0.4

[Buildroot] [PATCH 3/4] ffmpeg: allow customization of codecs, (de)muxers and other components

[Luca Ceresoli]

Add the option to customize the list of decoders, encoders, muxers, demuxers,
parsers, protocols, bsfs and filters to be built into ffmpeg, and to compile or
exclude input and output devices.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
---
 package/multimedia/ffmpeg/Config.in |   88 +++++++++++++++++++++++++++++++++++
 package/multimedia/ffmpeg/ffmpeg.mk |   52 ++++++++++++++++++++
 2 files changed, 140 insertions(+), 0 deletions(-)

diff --git a/package/multimedia/ffmpeg/Config.in b/package/multimedia/ffmpeg/Config.in
index 736a8ec..7530929 100644
--- a/package/multimedia/ffmpeg/Config.in
+++ b/package/multimedia/ffmpeg/Config.in
@@ -47,4 +47,92 @@ config BR2_PACKAGE_FFMPEG_FFSERVER
 	help
          FFserver is a streaming server for both audio and video.
 
+config BR2_PACKAGE_FFMPEG_ENCODERS
+	string "Enabled encoders"
+	default "all"
+	help
+	 Space-separated list of encoders to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-encoders in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_DECODERS
+	string "Enabled decoders"
+	default "all"
+	help
+	 Space-separated list of decoders to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-decoders in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_MUXERS
+	string "Enabled muxers"
+	default "all"
+	help
+	 Space-separated list of muxers to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-muxers in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_DEMUXERS
+	string "Enabled demuxers"
+	default "all"
+	help
+	 Space-separated list of demuxers to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-demuxers in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_PARSERS
+	string "Enabled parsers"
+	default "all"
+	help
+	 Space-separated list of parsers to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-parsers in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_BSFS
+	string "Enabled bitstreams"
+	default "all"
+	help
+	 Space-separated list of bitstream filters to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-bsfs in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_PROTOCOLS
+	string "Enabled protocols"
+	default "all"
+	help
+	 Space-separated list of protocols to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-protocols in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_FILTERS
+	string "Enabled filters"
+	default "all"
+	help
+	 Space-separated list of filters to build in FFmpeg,
+	 or "all" to build all of them.
+
+	 Run ./configure --list-filters in the ffmpeg sources
+	 directory to know the available options.
+
+config BR2_PACKAGE_FFMPEG_INDEVS
+	bool "Enable input devices"
+	default y
+
+config BR2_PACKAGE_FFMPEG_OUTDEVS
+	bool "Enable output devices"
+	default y
+
 endif
diff --git a/package/multimedia/ffmpeg/ffmpeg.mk b/package/multimedia/ffmpeg/ffmpeg.mk
index 0af08e5..3fc4990 100644
--- a/package/multimedia/ffmpeg/ffmpeg.mk
+++ b/package/multimedia/ffmpeg/ffmpeg.mk
@@ -49,6 +49,58 @@ else
 FFMPEG_CONF_OPT += --disable-ffserver
 endif
 
+ifneq ($(BR2_PACKAGE_FFMPEG_ENCODERS),"all")
+FFMPEG_CONF_OPT += --disable-encoders \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_ENCODERS)),--enable-encoder=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_DECODERS),"all")
+FFMPEG_CONF_OPT += --disable-decoders \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_DECODERS)),--enable-decoder=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_MUXERS),"all")
+FFMPEG_CONF_OPT += --disable-muxers \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_MUXERS)),--enable-muxer=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_DEMUXERS),"all")
+FFMPEG_CONF_OPT += --disable-demuxers \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_DEMUXERS)),--enable-demuxer=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_PARSERS),"all")
+FFMPEG_CONF_OPT += --disable-parsers \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_PARSERS)),--enable-parser=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_BSFS),"all")
+FFMPEG_CONF_OPT += --disable-bsfs \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_BSFS)),--enable-bsf=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_PROTOCOLS),"all")
+FFMPEG_CONF_OPT += --disable-protocols \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_PROTOCOLS)),--enable-protocol=$(x))
+endif
+
+ifneq ($(BR2_PACKAGE_FFMPEG_FILTERS),"all")
+FFMPEG_CONF_OPT += --disable-filters \
+	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_FILTERS)),--enable-filter=$(x))
+endif
+
+ifeq ($(BR2_PACKAGE_FFMPEG_INDEVS),y)
+FFMPEG_CONF_OPT += --enable-indevs
+else
+FFMPEG_CONF_OPT += --disable-indevs
+endif
+
+ifeq ($(BR2_PACKAGE_FFMPEG_OUTDEVS),y)
+FFMPEG_CONF_OPT += --enable-outdevs
+else
+FFMPEG_CONF_OPT += --disable-outdevs
+endif
+
 ifeq ($(BR2_PTHREADS_NONE),y)
 FFMPEG_CONF_OPT += --disable-pthreads
 else
-- 
1.7.0.4

[Buildroot] [PATCH 4/4] ffmpeg: add user-defined configure parameters

[Luca Ceresoli]

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
---
 package/multimedia/ffmpeg/Config.in |    7 +++++++
 package/multimedia/ffmpeg/ffmpeg.mk |    2 ++
 2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/package/multimedia/ffmpeg/Config.in b/package/multimedia/ffmpeg/Config.in
index 7530929..1049903 100644
--- a/package/multimedia/ffmpeg/Config.in
+++ b/package/multimedia/ffmpeg/Config.in
@@ -135,4 +135,11 @@ config BR2_PACKAGE_FFMPEG_OUTDEVS
 	bool "Enable output devices"
 	default y
 
+config BR2_PACKAGE_FFMPEG_EXTRACONF
+	string "Additional parameters for ./configure"
+	default ""
+	help
+	 Extra parameters that will be appended to FFmpeg's
+	 ./configure commandline.
+
 endif
diff --git a/package/multimedia/ffmpeg/ffmpeg.mk b/package/multimedia/ffmpeg/ffmpeg.mk
index 3fc4990..d23f0e9 100644
--- a/package/multimedia/ffmpeg/ffmpeg.mk
+++ b/package/multimedia/ffmpeg/ffmpeg.mk
@@ -120,6 +120,8 @@ else
 FFMPEG_CONF_OPT += --disable-zlib
 endif
 
+FFMPEG_CONF_OPT += $(call qstrip,$(BR2_PACKAGE_FFMPEG_EXTRACONF))
+
 # Override FFMPEG_CONFIGURE_CMDS: FFmpeg does not support --target and others
 define FFMPEG_CONFIGURE_CMDS
 	(cd $(FFMPEG_SRCDIR) && rm -rf config.cache && \
-- 
1.7.0.4

[Buildroot] [PATCH 1/4] ffmpeg: add new package

[Peter Korsgaard]

>>>>> "Luca" == Luca Ceresoli <luca@lucaceresoli.net> writes:

 Luca> Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>

Looks good - A few comments though:

 Luca> ---
 Luca>  CHANGES                             |    2 +-
 Luca>  package/multimedia/Config.in        |    1 +
 Luca>  package/multimedia/ffmpeg/Config.in |   25 +++++++++++
 Luca>  package/multimedia/ffmpeg/ffmpeg.mk |   79 +++++++++++++++++++++++++++++++++++
 Luca>  4 files changed, 106 insertions(+), 1 deletions(-)
 Luca>  create mode 100644 package/multimedia/ffmpeg/Config.in
 Luca>  create mode 100644 package/multimedia/ffmpeg/ffmpeg.mk

 Luca> diff --git a/CHANGES b/CHANGES
 Luca> index 3ba7195..6ca4fc9 100644
 Luca> --- a/CHANGES
 Luca> +++ b/CHANGES
 Luca> @@ -4,7 +4,7 @@
 
 Luca>  	New GTK-based configurator, usable using 'make gconfig'.
 
 Luca> -	New packages: cgilua, copas, coxpcall, luafilesystem,
 Luca> +	New packages: cgilua, copas, coxpcall, ffmpeg, luafilesystem,
 Luca>  	luasocket, rings, wsapi, xavante

I would prefer if patches don't edit CHANGES - There's too high risk for
merge conflicts.

 Luca> +config BR2_PACKAGE_FFMPEG_GPL
 Luca> +	bool "Enable GPL code"
 Luca> +	default n
 Luca> +config BR2_PACKAGE_FFMPEG_NONFREE
 Luca> +	bool "Enable nonfree code"
 Luca> +	default n

'n' is default, so there's no need for those lines.

 Luca> +ifeq ($(BR2_INET_IPV6),y)
 Luca> +FFMPEG_CONF_OPT += --enable-ipv6
 Luca> +else
 Luca> +FFMPEG_CONF_OPT += --disable-ipv6
 Luca> +endif

We do have a generic DISABLE_IPV6 if ffmpeg detects ipv6 support
automatically even if --enable-ipv6 isn' passed.

 Luca> +# Override FFMPEG_CONFIGURE_CMDS: FFmpeg does not support --target and others
 Luca> +define FFMPEG_CONFIGURE_CMDS
 Luca> +	(cd $(FFMPEG_SRCDIR) && rm -rf config.cache && \
 Luca> +	$(TARGET_CONFIGURE_OPTS) \
 Luca> +	$(TARGET_CONFIGURE_ARGS) \
 Luca> +	$(TARGET_CONFIGURE_ENV) \
 Luca> +	$(FFMPEG_CONF_ENV) \
 Luca> +	./configure \
 Luca> +		--enable-cross-compile	\
 Luca> +		--cross-prefix=$(TARGET_CROSS) \
 Luca> +		--sysroot=$(STAGING_DIR) \
 Luca> +		--host-cc=$(HOSTCC) \
 Luca> +		--cc=$(TARGET_CC) \
 Luca> +		--arch=$(BR2_ARCH) \
 Luca> +		--extra-cflags=-fPIC \
 Luca> +		$(DISABLE_NLS) \
 Luca> +		$(DISABLE_LARGEFILE) \
 Luca> +		$(DISABLE_IPV6) \
 Luca> +		$(FFMPEG_CONF_OPT) \

Does ffmpeg configure handle the -q (quiet) flag? If so, please add
$(QUIET) as well.

Is --cc needed? Doesn't it just use the CC environment variable? If not,
what about TARGET_CFLAGS / TARGET_LDFLAGS?

 Luca> +	)
 Luca> +endef
 Luca> +
 Luca> +# Override FFMPEG_INSTALL_TARGET_OPT: FFmpeg does not support install-strip
 Luca> +FFMPEG_INSTALL_TARGET_OPT = DESTDIR=$(TARGET_DIR) install

FYI, in the future I would like to get rid of the 'make install vs make
install-strip', but for now this is fine.

-- 
Bye, Peter Korsgaard

[Buildroot] [PATCH 3/4] ffmpeg: allow customization of codecs, (de)muxers and other components

[Peter Korsgaard]

>>>>> "Luca" == Luca Ceresoli <luca@lucaceresoli.net> writes:

 Luca> Add the option to customize the list of decoders, encoders,
 Luca> muxers, demuxers, parsers, protocols, bsfs and filters to be
 Luca> built into ffmpeg, and to compile or exclude input and output
 Luca> devices.

 Luca> +++ b/package/multimedia/ffmpeg/ffmpeg.mk
 Luca> @@ -49,6 +49,58 @@ else
 Luca>  FFMPEG_CONF_OPT += --disable-ffserver
 Luca>  endif
 
 Luca> +ifneq ($(BR2_PACKAGE_FFMPEG_ENCODERS),"all")
 Luca> +FFMPEG_CONF_OPT += --disable-encoders \
 Luca> +	$(foreach x,$(call qstrip,$(BR2_PACKAGE_FFMPEG_ENCODERS)),--enable-encoder=$(x))
 Luca> +endif
 Luca> +
 Luca> +ifneq ($(BR2_PACKAGE_FFMPEG_DECODERS),"all")

I would suggest you use qstrip + strip here as well, so it doesn't break if the
user accidently added extra spaces or so.

-- 
Bye, Peter Korsgaard