HLS Playback Start Time: RTSP vs MPEG-TS source stream

[1111]

Hello,

I’m using startMediaCasterStream() to dynamically connect to a set of streams that are then re-streamed with HLS.

I’m noticing big playback start time differences between an RTSP and an MPEG-TS source: it takes around 0.5-0.7 seconds to connect to the MPEG-TS stream and between 4-15 !! seconds or the RTSP source

The intervals above are the time between the startMediaCasterStream() call and the time the streams appear as published (logged in a custom module), so before the actual HLS segmentation begins (the final playback start time would be this time + at least 2 x chunk target duration, in my case 3000).

Is this caused by transmuxing or are there some options to be tweaked in order to speed up the playback start time? I tried disabling the jitter buffer, packet sorting etc. but it doesn’t seem to affect the start time.

Thank you for any suggestions/ideas.

[1111]

Ok, I sorted this out. By default the AVSyncMethod for RTP is senderreport. RTCP ports were unreachable so it tried to get a SR multiple times before giving up, hence the wait time.

Turning off the StreamValidator further reduced the time.

[sal_jefferson]

Thanks for the update and glad to hear you sorted this out.

Regards,

Salvadore