IPTV RTSP seek problem

[sl_asher 0]

Hello.

 

Seeking an RTSP stream (vod actually) is very slow. You have to wait double the TS segment duration.

 

For example:

Say each segment duration is 3 seconds.

1. I'm currently at 11.ts (~33 seconds) and I seek to 40.ts (~120 seconds) - Here player stalls for 40.ts (~120 seconds) and only starts playing after 80.ts.

2. I'm currently at 100.ts (~300 seconds) and I seek to 300.ts (~900 seconds) - Here player stalls for 300.ts (~900 seconds) and only starts playing after 301.ts.

 

I tried 3 different streams and all produces same result.

I can seek without problem using MPV, VLC and ffplay. So I don't think there's a problem with the stream.

Here's a sample stream if you want to test it: rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov

 

Attached log is for the first example.

 

Emby Server: 4.1.0.26

IPTV Plugin: 1.1.9.0

 

Hopefully my explanation made sense.

 

embyserver.txt

ffmpeg-transcode-1690ecaa-7d09-4421-b491-ef533ecd333c_1.txt

ffmpeg-transcode-a8f2a41f-e83c-466b-bfe0-cff7d34555a5_1.txt

Edited April 19, 2019 by sl_asher

[sl_asher 0]

6b80d57c0f64b00e9f86c9a27ee213da.m3u8 file before seeking

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:4
#EXTINF:3.375000,
6b80d57c0f64b00e9f86c9a27ee213da0.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da1.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da2.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da3.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da4.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da5.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da6.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da7.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da8.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da9.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da10.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da11.ts

6b80d57c0f64b00e9f86c9a27ee213da.m3u8 file after seeking complete

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:4
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da40.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da41.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da42.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da43.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da44.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da45.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da46.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da47.ts
#EXTINF:3.416667,
6b80d57c0f64b00e9f86c9a27ee213da48.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da49.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da50.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da51.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da52.ts
#EXTINF:2.916667,
6b80d57c0f64b00e9f86c9a27ee213da53.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da54.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da55.ts
#EXTINF:2.750000,
6b80d57c0f64b00e9f86c9a27ee213da56.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da57.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da58.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da59.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da60.ts
#EXTINF:2.916667,
6b80d57c0f64b00e9f86c9a27ee213da61.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da62.ts
#EXTINF:3.375000,
6b80d57c0f64b00e9f86c9a27ee213da63.ts
#EXTINF:2.833333,
6b80d57c0f64b00e9f86c9a27ee213da64.ts
#EXTINF:3.250000,
6b80d57c0f64b00e9f86c9a27ee213da65.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da66.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da67.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da68.ts
#EXTINF:2.541667,
6b80d57c0f64b00e9f86c9a27ee213da69.ts
#EXTINF:3.166667,
6b80d57c0f64b00e9f86c9a27ee213da70.ts
#EXTINF:3.166667,
6b80d57c0f64b00e9f86c9a27ee213da71.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da72.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da73.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da74.ts
#EXTINF:2.958333,
6b80d57c0f64b00e9f86c9a27ee213da75.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da76.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da77.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da78.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da79.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da80.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da81.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da82.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da83.ts
#EXTINF:3.000000,
6b80d57c0f64b00e9f86c9a27ee213da84.ts
#EXTINF:1.083333,
6b80d57c0f64b00e9f86c9a27ee213da85.ts
#EXT-X-ENDLIST

Maybe it has something to do with seek overwriting the playlist file?