---
fftools/ffmpeg_demux.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fftools/ffmpeg_demux.c b/fftools/ffmpeg_demux.c
index 8ea5318148..b32bac217d 100644
--- a/fftools/ffmpeg_demux.c
+++ b/fftools/ffmpeg_demux.c
@@ -363,8 +363,9 @@ static int thread_start(Demuxer *d)
if (d->thread_queue_size <= 0)
d->thread_queue_size = (nb_input_files > 1 ? 8 : 1);
- if (f->ctx->pb ? !f->ctx->pb->seekable :
- strcmp(f->ctx->iformat->name, "lavfi"))
+ if (nb_input_files > 1 &&
+ (f->ctx->pb ? !f->ctx->pb->seekable :
+ strcmp(f->ctx->iformat->name, "lavfi")))
d->non_blocking = 1;
ret = av_thread_message_queue_alloc(&d->in_thread_queue,
d->thread_queue_size,
sizeof(DemuxMsg));
--
2.35.1
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