Well, the warning is printed whenever you use a copy of the 'ffmpeg' binary with a copy of libavcodec (or any other library provided by the ffmpeg source package) that has been built with a different configuration. Which is the whole point of the 'libavcodec-extra*' packages: Enable additional functionality.
To avoid the warning, the following patch should do it: diff --git a/cmdutils.c b/cmdutils.c index 469c2d5..6fde13b 100644 --- a/cmdutils.c +++ b/cmdutils.c @@ -1053,8 +1053,6 @@ void print_error(const char *filename, int err) av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr); } -static int warned_cfg = 0; - #define INDENT 1 #define SHOW_VERSION 2 #define SHOW_CONFIG 4 @@ -1074,19 +1072,6 @@ static int warned_cfg = 0; AV_VERSION_MAJOR(version), AV_VERSION_MINOR(version),\ AV_VERSION_MICRO(version)); \ } \ - if (flags & SHOW_CONFIG) { \ - const char *cfg = libname##_configuration(); \ - if (strcmp(FFMPEG_CONFIGURATION, cfg)) { \ - if (!warned_cfg) { \ - av_log(NULL, level, \ - "%sWARNING: library configuration mismatch\n", \ - indent); \ - warned_cfg = 1; \ - } \ - av_log(NULL, level, "%s%-11s configuration: %s\n", \ - indent, #libname, cfg); \ - } \ - } \ } \ static void print_all_libs_info(int flags, int level) I'm not really comfortable with uploading this patch to ubuntu, because the check was put in for preventing surprises and assisting with bug triage. > As if the average user understands such advice, much less ever visits > launchpad. I do not think that the 'ffmpeg' command-line tool is useful to the "average [ubuntu] user". Frontend applications are going to ignore it anyways. So with this in mind, I'm inclined to mark this bug as "wontfix". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/730159 Title: ffmpeg library configuration mismatch To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg-extra/+bug/730159/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs