0 should only be returned when there was at least one output frame.
---
libavfilter/af_amix.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavfilter/af_amix.c b/libavfilter/af_amix.c
index a8ec8a1..deeaa03 100644
--- a/libavfilter/af_amix.c
+++ b/libavfilter/af_amix.c
@@ -409,7 +409,7 @@ static int request_frame(AVFilterLink *outlink)
available_samples = get_available_samples(s);
if (!available_samples)
- return 0;
+ return AVERROR(EAGAIN);
return output_frame(outlink, available_samples);
}
@@ -440,7 +440,7 @@ static int request_frame(AVFilterLink *outlink)
available_samples = get_available_samples(s);
if (!available_samples)
- return 0;
+ return AVERROR(EAGAIN);
available_samples = FFMIN(available_samples, wanted_samples);
} else {
available_samples = wanted_samples;
--
1.7.10
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