Add an audio transcoding example.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

configure

@@ -1043,6 +1043,7 @@ COMPONENT_LIST="
 
 EXAMPLE_LIST="
     output_example
+    transcode_aac_example
 "
 
 EXTERNAL_LIBRARY_LIST="
@@ -1952,6 +1953,7 @@ yadif_filter_deps="gpl"
 
 # examples
 output_example_deps="avcodec avformat avutil swscale"
+transcode_aac_example_deps="avcodec avformat avresample"
 
 # libraries
 avcodec_deps="avutil"

doc/Makefile

@@ -16,7 +16,8 @@ DOCS-$(CONFIG_TEXI2HTML)                        += $(HTMLPAGES)
 DOCS = $(DOCS-yes)
 
 DOC_EXAMPLES-$(CONFIG_OUTPUT_EXAMPLE)           += output
-ALL_DOC_EXAMPLES = output
+DOC_EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE)    += transcode_aac
+ALL_DOC_EXAMPLES = output transcode_aac
 
 DOC_EXAMPLES     := $(DOC_EXAMPLES-yes:%=doc/examples/%$(EXESUF))
 ALL_DOC_EXAMPLES := $(ALL_DOC_EXAMPLES:%=doc/examples/%$(EXESUF))