build: bump required FFmpeg/Libav libraries

The af_lavrresample commit made compilation fail on Libav 10, so I think
it's time to require somewhat more recent dependencies.

Libav 11 is the latest release, and FFmpeg 2.4 seems to correspond to
Libav 11. So use these.

Also adjust the configure failure message. Instead of (accidentally)
printing the pkg-config versions twice, print the release version
numbers too. This is helpful, because the release version numbers are
completely different from the pkg-config ones.

I will probably remove some compatibility hacks in the following commits
too.

1 files changed, 10 insertions, 9 deletions

diff --git a/wscript b/wscript
index f273388305..c8a9fcafc9 100644
--- a/wscript
+++ b/wscript
@@ -370,11 +370,12 @@ iconv support use --disable-iconv.",
 ]
 
 libav_pkg_config_checks = [
-    'libavutil',   '>= 52.48.101',
-    'libavcodec',  '>= 55.34.1',
-    'libavformat', '>= 55.12.0',
-    'libswscale',  '>= 2.1.2'
+    'libavutil',   '>= 54.02.0',
+    'libavcodec',  '>= 56.1.0',
+    'libavformat', '>= 56.01.0',
+    'libswscale',  '>= 2.1.3'
 ]
+libav_versions_string = "FFmpeg 2.4 or Libav 11"
 
 libav_dependencies = [
     {
@@ -383,15 +384,15 @@ libav_dependencies = [
         'func': check_pkg_config(*libav_pkg_config_checks),
         'req': True,
         'fmsg': "Unable to find development files for some of the required \
-Libav libraries ({0}). Aborting.".format(" ".join(libav_pkg_config_checks))
+FFmpeg/Libav libraries. You need at least {0}. Aborting.".format(libav_versions_string)
     }, {
         'name': '--libswresample',
         'desc': 'libswresample',
-        'func': check_pkg_config('libswresample', '>= 0.17.104'),
+        'func': check_pkg_config('libswresample', '>= 1.1.100'),
     }, {
         'name': '--libavresample',
         'desc': 'libavresample',
-        'func': check_pkg_config('libavresample',  '>= 1.1.0'),
+        'func': check_pkg_config('libavresample',  '>= 2.1.0'),
         'deps_neg': ['libswresample'],
     }, {
         'name': 'resampler',
@@ -403,11 +404,11 @@ Libav libraries ({0}). Aborting.".format(" ".join(libav_pkg_config_checks))
     }, {
         'name': '--libavfilter',
         'desc': 'libavfilter',
-        'func': check_pkg_config('libavfilter', '>= 3.90.100'),
+        'func': check_pkg_config('libavfilter', '>= 5.0.0'),
     }, {
         'name': '--libavdevice',
         'desc': 'libavdevice',
-        'func': check_pkg_config('libavdevice', '>= 54.0.0'),
+        'func': check_pkg_config('libavdevice', '>= 55.0.0'),
     }, {
         'name': 'avcodec-chroma-pos-api',
         'desc': 'libavcodec avcodec_enum_to_chroma_pos API',