Input on/off state can change in request_samples(), which can result in
a state where only the first input is active. get_available_samples()
will then return 0, and request_frame() will fail with EAGAIN even
though there is data on the single active input.
Take this into account and check the number of active inputs again after
calling request_samples().
---
libavfilter/af_amix.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavfilter/af_amix.c b/libavfilter/af_amix.c
index deeaa03..439231f 100644
--- a/libavfilter/af_amix.c
+++ b/libavfilter/af_amix.c
@@ -437,7 +437,9 @@ static int request_frame(AVFilterLink *outlink)
ret = calc_active_inputs(s);
if (ret < 0)
return ret;
+ }
+ if (s->active_inputs > 1) {
available_samples = get_available_samples(s);
if (!available_samples)
return AVERROR(EAGAIN);
--
1.7.10
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