how can i get current live segment from this mpd can any one tell me formula

[alienmaster9]

<?xml version="1.0" encoding="utf-8"?> <MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:dash:schema:mpd:2011" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd" id="1460881" type="dynamic" publishTime="2021-02-25T16:42:34" minimumUpdatePeriod="PT30S" availabilityStartTime="2018-10-22T12:02:06.387000+00:00" minBufferTime="PT30S" suggestedPresentationDelay="PT25.00S" timeShiftBufferDepth="PT3639.00S" profiles="urn:mpeg:dash:profile:isoff-live:2011"> <Period start="PT0.00S" id="1"> <AdaptationSet mimeType="video/mp4" segmentAlignment="true" subsegmentAlignment="true" startWithSAP="1" subsegmentStartsWithSAP="1" bitstreamSwitching="true"> <Representation id="1" width="480" height="360" frameRate="25/1" bandwidth="1200000" codecs="avc1.4D401E"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="25" media="1460881_video_1_0_$Number$.mp4?m=1612386835" initialization="1460881_video_1_0_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="1851450040" d="200" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="2" width="480" height="360" frameRate="25/1" bandwidth="800000" codecs="avc1.42E01E"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="25" media="1460881_video_1_1_$Number$.mp4?m=1612386835" initialization="1460881_video_1_1_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="1851450040" d="200" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="3" width="360" height="270" frameRate="25/1" bandwidth="400000" codecs="avc1.42E015"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="25" media="1460881_video_1_2_$Number$.mp4?m=1612386835" initialization="1460881_video_1_2_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="1851450040" d="200" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="4" width="234" height="176" frameRate="25/1" bandwidth="180000" codecs="avc1.42E00C"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="25" media="1460881_video_1_3_$Number$.mp4?m=1612386835" initialization="1460881_video_1_3_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="1851450040" d="200" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> </AdaptationSet> <AdaptationSet mimeType="audio/mp4" segmentAlignment="0"> <Representation id="5" bandwidth="98756" audioSamplingRate="48000" codecs="mp4a.40.2"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="48000" media="1460881_audio_1_4_$Number$.mp4?m=1612386835" initialization="1460881_audio_1_4_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="3554784077455" d="384000" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="6" bandwidth="98756" audioSamplingRate="48000" codecs="mp4a.40.2"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="48000" media="1460881_audio_1_5_$Number$.mp4?m=1612386835" initialization="1460881_audio_1_5_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="3554784077455" d="384000" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="7" bandwidth="98604" audioSamplingRate="48000" codecs="mp4a.40.2"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="48000" media="1460881_audio_1_6_$Number$.mp4?m=1612386835" initialization="1460881_audio_1_6_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="3554784077455" d="384000" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> <Representation id="8" bandwidth="98678" audioSamplingRate="48000" codecs="mp4a.40.2"> <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc" cenc:default_KID="2279EB85-599C-4464-AA2C-B532EDCAAB3E" xmlns:cenc="urn:mpeg:cenc:2013"/> <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"> <cenc:pssh xmlns:cenc="urn:mpeg:cenc:2013">AAAAP3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAB8IARIQInnrhVmcRGSqLLUy7cqrPiIJNDAwMDAwMDAx</cenc:pssh> </ContentProtection> <SegmentTemplate timescale="48000" media="1460881_audio_1_7_$Number$.mp4?m=1612386835" initialization="1460881_audio_1_7_init.mp4?m=1612386835" startNumber="36279284"> <SegmentTimeline> <S t="3554784077455" d="384000" r="453"/> </SegmentTimeline> </SegmentTemplate> </Representation> </AdaptationSet> </Period> </MPD>

when am using startnumber its going a hour behind. i want latest segment

[dsilhavy]

I recommend to check:

• https://dashif-documents.azurewebsites.net/Guidelines-TimingModel/master/Guidelines-TimingModel.html#clock-sync
• https://dash-industry-forum.github.io/docs/DASH-IF-IOP-v4.3.pdf

Simplified dash.js/player approach

1. Perform a UTC sync to align server and client clocks
2. Use the "now" time as an anchor and define the DVR window based on the @timeShiftBufferDepth attribute in the MPD. DVR window = now - timeShiftBufferDept up to now
3. Calculate the live delay. In your case: @suggestedPresentationDelay is defined so the the start time will be now - @suggestedPresentationDelay. This should be included in the DVR window.
4. Look for the corresponding segment in the MPD and download it

[alienmaster9]

@dsilhavy bro can you show me where the player fetch segment at time now. I mean please point me code

[dsilhavy]

• Live delay calculation in PlaybackController.computeAndSetLiveDelay()
• Live start time calculation in StreamProcessor.getLiveStartTime()
• SeekTime calculation in PlaybackController.onStreamInitialized()

[alienmaster9]

am using go lang its hard for me to read js i cannot understand give me calculation like this current segmt = startnumber + like calculation formula

[alienmaster9]

https://github.com/quickstreamingmedia/testRepo/blob/master/dash/calc_num.sh i found a bash script which actually working in my case. thanks for reply @dsilhavy

[alienmaster9]

hello @dsilhavy i used this formula current_number=$(($startNumber + $seg_count - 1 )) this work for video but audio its not working <SegmentTemplate timescale="48000" media="3115508_audio_1_4_$Number$.mp4?m=1614936814" initialization="3115508_audio_1_4_init.mp4?m=1614936814" startNumber="55590794"> <SegmentTimeline> <S t="5419468211929" d="380928"/> <S t="5419468592857" d="385024" r="2"/> <S t="5419469747929" d="380928"/> <S t="5419470128857" d="385024" r="2"/> <S t="5419471283929" d="380928"/> <S t="5419471664857" d="385024" r="2"/> <S t="5419472819929" d="380928"/>

audio got time line like this do i need to calculate separate for this ???
am getting audio 404 after few segments