[FFmpeg-devel] [PATCH 2/3] concatdec: add force_duration option

[Andrey Utkin]

When set to 1, demuxer stops reading file when timestamp reaches stated duration
---
 libavformat/concatdec.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index b3e6a37..263e00f 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -56,6 +56,7 @@ typedef struct {
     int seekable;
     ConcatMatchMode stream_match_mode;
     unsigned auto_convert;
+    int force_duration;
 } ConcatContext;
 
 static int concat_probe(AVProbeData *probe)
@@ -516,6 +517,18 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
             av_packet_unref(pkt);
             continue;
         }
+        if (cat->force_duration && cat->cur_file->duration != AV_NOPTS_VALUE
+                && pkt->pts != AV_NOPTS_VALUE) {
+            int64_t duration_up_to_now = av_rescale_q(pkt->pts,
+                    cat->avf->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q)
+                - cat->cur_file->start_time;
+            if (duration_up_to_now > cat->cur_file->duration) {
+                av_packet_unref(pkt);
+                if ((ret = open_next_file(avf)) < 0)
+                    return ret;
+                continue;
+            }
+        }
         pkt->stream_index = cs->out_stream_index;
         break;
     }
@@ -629,6 +642,8 @@ static const AVOption options[] = {
       OFFSET(safe), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, DEC },
     { "auto_convert", "automatically convert bitstream format",
       OFFSET(auto_convert), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
+    { "force_duration", "stop reading file when timestamp reaches stated duration",
+      OFFSET(force_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
     { NULL }
 };
 
-- 
1.8.3.2