From db9e87dd8c1ce11d37edc16f9380ee8dee68891b Mon Sep 17 00:00:00 2001
From: Marton Balint <cus@passwd.hu>
Date: Sun, 4 Jun 2017 04:25:43 +0200
Subject: [PATCH] avformat/file: increase min/max packet size to 256k for
written files
Buffering more than one packet can be a huge performance improvement for
encoding files with small packets (e.g. wav) over SMB/CIFS.
Acked-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Marton Balint <cus@passwd.hu>
---
libavformat/file.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavformat/file.c b/libavformat/file.c
index 3db9cd0b9e..1d321c4205 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -229,6 +229,11 @@ static int file_open(URLContext *h, const char *filename, int flags)
h->is_streamed = !fstat(fd, &st) && S_ISFIFO(st.st_mode);
+ /* Buffer writes more than the default 32k to improve throughput especially
+ * with networked file systems */
+ if (!h->is_streamed && flags & AVIO_FLAG_WRITE)
+ h->min_packet_size = h->max_packet_size = 262144;
+
return 0;
}