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lavf/hls: add http_seekable option for HTTP partial requests

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Add http_seekable option for HTTP partial requests, when The
EXT-X-BYTERANGE tag indicates that a Media Segment is a sub-range
of the resource identified by its URI, we can use HTTP partial
requests to get the Media Segment.

Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
This commit is contained in:
Jun Zhao 2019-08-08 00:12:16 +08:00
parent af3ddd581f
commit 5e829262a6
2 changed files with 11 additions and 2 deletions
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4
doc/demuxers.texi
View File

@ -338,6 +338,10 @@ Enabled by default.
@item http_multiple
Use multiple HTTP connections for downloading HTTP segments.
Enabled by default for HTTP/1.1 servers.
@item http_seekable
Use HTTP partial requests for downloading HTTP segments.
0 = disable, 1 = enable, -1 = auto, Default is auto.
@end table
@section image2

9
libavformat/hls.c
View File

@ -207,6 +207,7 @@ typedef struct HLSContext {
int max_reload;
int http_persistent;
int http_multiple;
int http_seekable;
AVIOContext *playlist_pb;
} HLSContext;
@ -1796,8 +1797,10 @@ static int hls_read_header(AVFormatContext *s)
if ((ret = save_avio_options(s)) < 0)
goto fail;
/* Some HLS servers don't like being sent the range header */
av_dict_set(&c->avio_opts, "seekable", "0", 0);
/* XXX: Some HLS servers don't like being sent the range header,
in this case, need to setting http_seekable = 0 to disable
the range header */
av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
goto fail;
@ -2311,6 +2314,8 @@ static const AVOption hls_options[] = {
OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
{"http_multiple", "Use multiple HTTP connections for fetching segments",
OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
{"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
{NULL}
};