[FFmpeg-devel] [PATCH] lavfi/avfiltergraph: print query_formats errors.

[Nicolas George]

Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
---
 libavfilter/avfiltergraph.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index bd772a8..f144624 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -195,8 +195,11 @@ static int filter_query_formats(AVFilterContext *ctx)
                             ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
                             AVMEDIA_TYPE_VIDEO;
 
-    if ((ret = ctx->filter->query_formats(ctx)) < 0)
+    if ((ret = ctx->filter->query_formats(ctx)) < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
+               ctx->name, av_err2str(ret));
         return ret;
+    }
 
     formats = ff_all_formats(type);
     if (!formats)
-- 
1.7.10.4