[PATCH 1/7] Clarify description for AVERROR_NOTSUPP.

[Stefano Sabatini]

---
 libavutil/error.c |    2 +-
 libavutil/error.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavutil/error.c b/libavutil/error.c
index 88d9ad6..b69ddbd 100644
--- a/libavutil/error.c
+++ b/libavutil/error.c
@@ -27,7 +27,7 @@ int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
     switch (errnum) {
     case AVERROR_EOF:               errstr = "End of file"; break;
     case AVERROR_INVALIDDATA:       errstr = "Invalid data found when processing input"; break;
-    case AVERROR_NOTSUPP:           errstr = "Operation not supported"; break;
+    case AVERROR_NOTSUPP:           errstr = "Invalid or illegal operation requested"; break;
     case AVERROR_NUMEXPECTED:       errstr = "Number syntax expected in filename"; break;
     case AVERROR_PATCHWELCOME:      errstr = "Not yet implemented in FFmpeg, patches welcome"; break;
     }
diff --git a/libavutil/error.h b/libavutil/error.h
index c757981..f523efe 100644
--- a/libavutil/error.h
+++ b/libavutil/error.h
@@ -48,7 +48,7 @@
 #endif
 
 #define AVERROR_EOF         AVERROR(EPIPE)   ///< End of file
-#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  ///< Operation not supported
+#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  ///< Invalid or illegal operation requested. The requested operation cannot be executed or implemented.
 
 #define AVERROR_PATCHWELCOME    (-MKTAG('P','A','W','E')) ///< Not yet implemented in FFmpeg, patches welcome
 
-- 
1.7.0


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