# \#EXT-X-PROGRAM-DATE-TIME may be wrong

**URL:** <https://community.wowza.com/t/ext-x-program-date-time-may-be-wrong/55577>\
**Category:** Wowza Video (Formerly Streaming Cloud)\
**Created:** [July 17, 2020, 1:33pm UTC](https://community.wowza.com/t/ext-x-program-date-time-may-be-wrong/55577 "2020-07-17T13:33:45Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Shimpei\_Okamura](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@Shimpei\_Okamura](https://community.wowza.com/u/Shimpei_Okamura)\
**Post date:** [July 17, 2020, 1:33pm UTC](https://community.wowza.com/t/ext-x-program-date-time-may-be-wrong/55577/1 "2020-07-17T13:33:45Z")

</div>

After starting my transcoder and push rtmp audio stream, my fastly target’s playback url returns like

```auto
[I] ➜ http https://cdn3.wowza.com/1/xxxxx/yyyyy/hls/live/playlist.m3u8
HTTP/1.1 200 OK
...
Content-Length: 110
Content-Type: application/x-mpegURL
Date: Fri, 17 Jul 2020 08:28:34 GMT
Via: 1.1 varnish
X-Cache: MISS
X-Cache-Hits: 0
X-Served-By: cache-tyo19920-TYO
X-Timer: S1594974515.832076,VS0,VE78

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=67021,CODECS="mp4a.40.2"
../jfpdkl28/1/chunklist_ao.m3u8

```

It’s fine. But looking into chunklist\_ao.m3u8…

```auto
[I] ➜ http https://cdn3.wowza.com/1/xxxxx/yyyyy/hls/jfpdkl28/1/chunklist_ao.m3u8
HTTP/1.1 200 OK
...
Content-Length: 559
Content-Type: application/x-mpegURL
Date: Fri, 17 Jul 2020 08:28:37 GMT
Via: 1.1 varnish
X-Cache: MISS
X-Cache-Hits: 0
X-Served-By: cache-tyo19933-TYO
X-Timer: S1594974517.336859,VS0,VE279

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:7
#EXT-X-PROGRAM-DATE-TIME:2020-07-17T08:27:54.671Z
#EXTINF:10.031,
0001ah19/media_ao_7.aac
#EXTINF:10.031,
0001ah19/media_ao_8.aac
...
#EXTINF:9.961,
0001ah19/media_ao_15.aac
#EXTINF:10.031,
0001ah19/media_ao_16.aac

```

#EXT-X-PROGRAM-DATE-TIME may be a little old. And next updates,

```auto
[I] ➜ http https://cdn3.wowza.com/1/xxxxx/yyyyy/hls/jfpdkl28/1/chunklist_ao.m3u8
HTTP/1.1 200 OK
...
Content-Length: 560
Content-Type: application/x-mpegURL
Date: Fri, 17 Jul 2020 08:28:53 GMT
Via: 1.1 varnish
X-Cache: HIT
X-Cache-Hits: 1
X-Served-By: cache-tyo19933-TYO
X-Timer: S1594974533.035981,VS0,VE1

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:8
#EXT-X-PROGRAM-DATE-TIME:2020-07-17T08:28:14.733Z
#EXTINF:10.031,
0001ah19/media_ao_8.aac
#EXTINF:9.961,
0001ah19/media_ao_9.aac
...
#EXTINF:10.031,
0001ah19/media_ao_16.aac
#EXTINF:10.031,
0001ah19/media_ao_17.aac

```

One sequence proceeds, and #EXT-X-PROGRAM-DATE-TIME increases 20secs although #EXT-X-TARGETDURATION is 11.

some minutes later…

```auto
[I] ➜ http https://cdn3.wowza.com/1/xxxxx/yyyyy/hls/jfpdkl28/1/chunklist_ao.m3u8
HTTP/1.1 200 OK
...
Content-Length: 562
Content-Type: application/x-mpegURL
Date: Fri, 17 Jul 2020 08:34:30 GMT
Via: 1.1 varnish
X-Cache: MISS
X-Cache-Hits: 0
X-Served-By: cache-tyo19940-TYO
X-Timer: S1594974871.676711,VS0,VE156

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:42
#EXT-X-PROGRAM-DATE-TIME:2020-07-17T08:39:34.753Z
#EXTINF:9.961,
0001ah19/media_ao_42.aac
#EXTINF:10.031,
0001ah19/media_ao_43.aac
...
#EXTINF:10.031,
0001ah19/media_ao_50.aac
#EXTINF:9.962,
0001ah19/media_ao_51.aac

```

Now, #EXT-X-PROGRAM-DATE-TIME is absolutely in future. I doubt something wrong with my transcoder or output settings… How this behavior occurs?

Also, I can’t determine if this is the reason, but Android Exoplayer can’t play well our transcoder’s output (It stops playing after some time)

---

<div class="post-metadata">

**Author:** ![video\_streaming](https://avatars.discourse-cdn.com/v4/letter/v/22d042/32.png) [@video\_streaming](https://community.wowza.com/u/video_streaming)\
**Post date:** [July 17, 2020, 7:01pm UTC](https://community.wowza.com/t/ext-x-program-date-time-may-be-wrong/55577/2 "2020-07-17T19:01:05Z")

</div>

I’ll need to check on how compatible Exoplayer’s libraries are with cloud transcoder and fastly.

---

<div class="post-metadata">

**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\
**Post date:** [July 20, 2020, 5:09pm UTC](https://community.wowza.com/t/ext-x-program-date-time-may-be-wrong/55577/3 "2020-07-20T17:09:03Z")

</div>

This is definitely not something we would be able to do as far as timestamps for the future segments. I’d submit a support ticket so we can see what is going on here. We may need to test with the Android Exoplayer and the timestamps.