[FFmpeg-devel] [PATCH] avformat/concatdec: add concat_seekable operation

[Steven Liu]

when use stream_loop to control the loop times, the seekable is
set to 0 default, and must set duration or inpoint and outpoint
into the concat list, now use this option can support use stream_loop
to control the loop times of the concat list

Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
---
 doc/demuxers.texi       | 5 +++++
 libavformat/concatdec.c | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 29a23d4..eb0e67d 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -207,6 +207,11 @@ Currently, the only conversion is adding the h264_mp4toannexb bitstream
 filter to H.264 streams in MP4 format. This is necessary in particular if
 there are resolution changes.
 
+ at item concat_seekable
+If set to 1, the seek operation will be enabled, user can use stream_loop to control
+loop times.
+The default is 0.
+
 @item segment_time_metadata
 If set to 1, every packet will contain the @var{lavf.concat.start_time} and the
 @var{lavf.concat.duration} packet metadata values which are the start_time and
diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 8649916..0a61af1 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -493,6 +493,9 @@ static int concat_read_header(AVFormatContext *avf)
         cat->seekable = 1;
     }
 
+    if (cat->seekable) {
+        cat->seekable = 1;
+    }
     cat->stream_match_mode = avf->nb_streams ? MATCH_EXACT_ID :
                                                MATCH_ONE_TO_ONE;
     if ((ret = open_file(avf, 0)) < 0)
@@ -771,6 +774,8 @@ static const AVOption options[] = {
       OFFSET(auto_convert), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, DEC },
     { "segment_time_metadata", "output file segment start time and duration as packet metadata",
       OFFSET(segment_time_metadata), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
+    { "concat_seekable", "set seekable status of concat list",
+      OFFSET(seekable), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
     { NULL }
 };
 
-- 
2.10.1 (Apple Git-78)