[FFmpeg-devel] [PATCH] Make the image2 demuxer log a more explicative error message in case the user requests to write more than one file and the path does not contain the "%d"/"%0Nd" pattern.

[Stefano Sabatini]

---
 libavformat/img2.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/libavformat/img2.c b/libavformat/img2.c
index 71f1dd0..c817fde 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -347,7 +347,9 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
     if (!img->is_pipe) {
         if (av_get_frame_filename(filename, sizeof(filename),
                                   img->path, img->img_number) < 0 && img->img_number>1) {
-            av_log(s, AV_LOG_ERROR, "Could not get frame filename from pattern\n");
+            av_log(s, AV_LOG_ERROR,
+                   "Could not get frame filename number %d from pattern '%s'\n",
+                   img->img_number, img->path);
             return AVERROR(EIO);
         }
         for(i=0; i<3; i++){
-- 
1.7.2.3