Re: splitmuxsink, issues with max-size-time and exact duration

[Антон Шаров]

Hi! Thank you for reply!
 
How to fix this issue? From one point of view I think it would be ok to ask user for n seconds and 
set n+2 to obtain exact duration, but I think I miss somthing to deal with it properly.
  
>Пятница, 21 июля 2023, 14:05 +03:00 от Krutskikh Ivan <stein.hak at gmail.com>:
> 
>Hi!
> 
>I think it depends on seconds between  key (I) frames since splitmuxsink begins each new file with a key frame.  
>пт, 21 июл. 2023г. в 13:46, Антон Шаров via gstreamer-devel < gstreamer-devel at lists.freedesktop.org >:
>>Hi. 
>> 
>>I found very strange issue with splitmuxsink and it’s  max-size-time property, namely
>>given n sec. for desired duration, it’s actual duration would be n-2 sec.  Initially I’ve discovered this
>>issue while testing hand-coded pipeline, but then desided to reproduce the issue with gst-launch
>>and observed the very same behaviour. Given 
>>gst-launch-1.0 -e -v rtspsrc buffer-mode=0 add-reference-timestamp-meta=true  location=rtsp://user:pass@ip_addr/onvif/media?profile=Profile1 ! rtph264depay ! h264parse ! splitmuxsink location="d:\\video_files\\video_%02d.mp4" max-size-time=10000000000
>>(note, max-size-time=10000000000 is 10 sec in nanoseconds)
>>the actual duration of files will be 8 sec.
>>Same for 7→ 5, 5→ 3, and so on. So, it seems to be the pattern — set for n secodns, receive for n-2 seconds.
>>Is it ok or maybe I miss something? I don’t think that it depends on rtps source.
>> 
>>Thanks in advance.
>> 
>>Here some initial seesion info:
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: latency = 2000
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: ntp-sync = false
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: rfc7273-sync = false
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: add-reference-timestamp-meta = true
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: ntp-time-source = ntp
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: drop-on-latency = false
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: max-rtcp-rtp-time-diff = 1000
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: max-ts-offset-adjustment = 0
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: buffer-mode = none
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc1: timeout = 5000000000
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc1: caps = application/x-rtp, media=(string)video, payload=(int)97, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, profile-level-id=(string)4D00000000000000, sprop-parameter-sets=(string)"Z00AH52oFAFum4CAgIE\=\,aO48gA\=\=", a-framerate=(string)15, ssrc=(uint)3053121902
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc2: caps = application/x-rtcp
>>Progress: (request) SETUP stream 1
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc3: timeout = 5000000000
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc3: caps = application/x-rtp, media=(string)audio, payload=(int)0, clock-rate=(int)8000, encoding-name=(string)PCMU, encoding-params=(string)1, ssrc=(uint)2174462030
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc4: caps = application/x-rtcp
>>Progress: (open) Opened Stream
>>Setting pipeline to PLAYING ...
>>New clock: GstSystemClock
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstRtpBin:manager: buffer-mode = none
>>Progress: (request) Sending PLAY request
>>Redistribute latency...
>>Redistribute latency...
>>Progress: (request) Sending PLAY request
>>Redistribute latency...
>>Redistribute latency...
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc1: caps = application/x-rtp, media=(string)video, payload=(int)97, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, profile-level-id=(string)4D00000000000000, sprop-parameter-sets=(string)"Z00AH52oFAFum4CAgIE\=\,aO48gA\=\=", a-framerate=(string)15, ssrc=(uint)3053121902, clock-base=(uint)2632806877, seqnum-base=(uint)14666, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1, onvif-mode=(boolean)false
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc3: caps = application/x-rtp, media=(string)audio, payload=(int)0, clock-rate=(int)8000, encoding-name=(string)PCMU, encoding-params=(string)1, ssrc=(uint)2174462030, clock-base=(uint)661265319, seqnum-base=(uint)53364, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1, onvif-mode=(boolean)false
>>Progress: (request) Sent PLAY request
>>/GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0/GstUDPSrc:udpsrc1.GstPad:src: caps = application/x-rtp, media=(string)video, payload=(int)97, clock-rate=(int)90000, encoding-name=(string)H264, packetization-mode=(string)1, profile-level-id=(string)4D00000000000000, sprop-parameter-sets=(string)"Z00AH52oFAFum4CAgIE\=\,aO48gA\=\=", a-framerate=(string)15, ssrc=(uint)3053121902, clock-base=(uint)2632806877, seqnum-base=(uint)14666, npt-start=(guint64)0, play-speed=(double)1, play-scale=(double)1, onvif-mode=(boolean)false
>> 
>> 
>> 
>>--
>>С Уважением,
>>Шаров Антон 
 
 
--
С Уважением,
Шаров Антон
 
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