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-rw-r--r--libswresample/swresample.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index 1efb563d8f..e4c1ff9ca2 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -105,6 +105,7 @@ struct SwrContext *swr_alloc_set_opts(struct SwrContext *s,
av_opt_set_int(s, "tsf", AV_SAMPLE_FMT_S16, 0);
av_opt_set_int(s, "ich", av_get_channel_layout_nb_channels(s-> in_ch_layout), 0);
av_opt_set_int(s, "och", av_get_channel_layout_nb_channels(s->out_ch_layout), 0);
+ av_opt_set_int(s, "uch", 0, 0);
return s;
}