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authorAman Gupta <aman@tmm1.net>2017-12-12 15:25:46 -0800
committerAman Gupta <aman@tmm1.net>2017-12-22 14:42:50 -0800
commit1f0eaa02aa7141f371e095540ac285698a0bdf46 (patch)
tree7f42dc170ae1aeb630085326aa00dc038b486ab0 /doc
parent03765aa6fa9c519571586db87d4dade1102c4c86 (diff)
downloadffmpeg-1f0eaa02aa7141f371e095540ac285698a0bdf46.tar.gz
avformat/hls: add http_multiple option
This improves network throughput of the hls demuxer by avoiding the latency introduced by downloading segments one at a time. The problem is particularly noticable over high-latency network connections: for instance, if RTT is 250ms, there will a 250ms idle period between when one segment response is read and the next one starts. The obvious solution to this is to use HTTP pipelining, where a second request can be sent (on the persistent http/1.1 connection) before the first response is fully read. Unfortunately the way the http protocol is implemented in avformat makes implementing pipleining very complex. Instead, this commit simulates pipelining using two separate persistent http connections. This has the advantage of working independently of the http_persistent option, and can be used with http/1.0 servers as well. The pair of connections is swapped every time a new segment starts downloading, and a request for the next segment is sent on the secondary connection right away. This means the second response will be ready and waiting by the time the current response is fully read. Signed-off-by: Aman Gupta <aman@tmm1.net> Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Diffstat (limited to 'doc')
-rw-r--r--doc/demuxers.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index f76829adfe..81ab399cdc 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -320,6 +320,10 @@ Default value is 1000.
@item http_persistent
Use persistent HTTP connections. Applicable only for HTTP streams.
Enabled by default.
+
+@item http_multiple
+Use multiple HTTP connections for downloading HTTP segments.
+Enabled by default.
@end table
@section image2