Hi,
Patch is attached,
Quick notes:
- Playing HLS streams - FFPlay stalls a bit before each segment download
- Stalls accumulate and FFPlay falls behind
- We get log warning and segment skip.
Fix:
- Just make sure HLS is marked as a real time stream.
---
ffplay.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/ffplay.c b/ffplay.c
index 11c5091..ed001cc 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2801,6 +2801,7 @@ static int is_realtime(AVFormatContext *s)
if( !strcmp(s->iformat->name, "rtp")
|| !strcmp(s->iformat->name, "rtsp")
|| !strcmp(s->iformat->name, "sdp")
+ || !strcmp(s->iformat->name, "hls,applehttp")
)
return 1;
--
2.7.4
Thank you,
Adrian
>From cf7d13397b996eb0d4b97dadbf9b7250fd96e598 Mon Sep 17 00:00:00 2001
From: Adrian Cruceru <adrian.cruc...@adswizz.com>
Date: Wed, 1 Jun 2016 16:05:25 +0300
Subject: [PATCH] FFPlay on a HLS stream skips audio from time to time.
Log warning: "skipping %d segments ahead, expired from playlists" is displayed (hls.c:1290)
Online reports: http://ffmpeg.gusari.org/viewtopic.php?f=26&t=1444
Actual problem:
- FFPlay ends up with audio way behind streaming server
- This is because HLS works as a real time protocol using:
- - Large segments - download takes some time.
- - ffplay.c queues up at most 25 frames (lines 3068-3078) - which may be insufficient and cause slight stall in audio playback until next segment is downloaded.
- - stalls above accumulate to the point where ffplay does a skip-to-correct segment and jumps over some data. (This is done as server may remove segments as expired)
Fix:
- Quick option - and one in patch - just make sure we use infinite_buffer for hls as well. (mark it as real time)
- Alternative - increase buffer size to be larger then time it takes to download a segment.
---
ffplay.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/ffplay.c b/ffplay.c
index 11c5091..ed001cc 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2801,6 +2801,7 @@ static int is_realtime(AVFormatContext *s)
if( !strcmp(s->iformat->name, "rtp")
|| !strcmp(s->iformat->name, "rtsp")
|| !strcmp(s->iformat->name, "sdp")
+ || !strcmp(s->iformat->name, "hls,applehttp")
)
return 1;
--
2.7.4
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