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-rw-r--r--libavdevice/lavfi.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libavdevice/lavfi.c b/libavdevice/lavfi.c
index 559f721c8f..a177ad0271 100644
--- a/libavdevice/lavfi.c
+++ b/libavdevice/lavfi.c
@@ -248,6 +248,10 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
ret = av_opt_set_int_list(sink, "sample_fmts", sample_fmts, AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
if (ret < 0)
goto end;
+ ret = av_opt_set_int(sink, "all_channel_counts", 1,
+ AV_OPT_SEARCH_CHILDREN);
+ if (ret < 0)
+ goto end;
}
lavfi->sinks[i] = sink;