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-rw-r--r--libavformat/mux.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/libavformat/mux.c b/libavformat/mux.c
index 0bc9b6b87d..415bd3948f 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -102,7 +102,7 @@ int avformat_alloc_output_context2(AVFormatContext **avctx, const AVOutputFormat
if (format) {
oformat = av_guess_format(format, NULL, NULL);
if (!oformat) {
- av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
+ av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not known.\n", format);
ret = AVERROR(EINVAL);
goto error;
}
@@ -110,8 +110,10 @@ int avformat_alloc_output_context2(AVFormatContext **avctx, const AVOutputFormat
oformat = av_guess_format(NULL, filename, NULL);
if (!oformat) {
ret = AVERROR(EINVAL);
- av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
- filename);
+ av_log(s, AV_LOG_ERROR,
+ "Unable to choose an output format for '%s'; "
+ "use a standard extension for the filename or specify "
+ "the format manually.\n", filename);
goto error;
}
}