"kurento-player demo", the begining seconds of audio is omited

[darrenhp]

Prerequisites

• [X] I agree to fill this issue template.
• [X] I have read the Troubleshooting Guide and Support Instructions.

Issue description

In the "kurento-player" demo , I play a short webm or mp3 file (about 4-10 seconds) , and mostly the beginning 2-4 seconds audio is omited;

Context

How to reproduce?

In the "kurento-player" demo , play a shortwebm or mp3 file(http link);

Expected & current behavior

(Optional) Possible solution

INFO about Kurento Media Server

• Kurento version: 6.15.0
• Server OS: 18.04 (Bionic), etc. --
• Installation method:
  • [X] apt-get
  • [] Docker
  • [] AWS CloudFormation
  • [] Built from sources

INFO about your Application Server

• Programming Language: java
• Kurento Client version: 6.15.0

INFO about end-user clients

• Device(s): Mac
• OS(es): 10.15.6
• Browser(s): Chrome 86

INFO about your environment

Run these commands

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"

kurento-media-server --version
Kurento Media Server version: 6.15.0
Found modules:
        'core' version 6.15.0
        'elements' version 6.15.0
        'filters' version 6.15.0

dpkg -l | grep -Pi 'kurento|kms-|gst.*1.5|nice'
ii  gstreamer1.5-alsa:amd64                1.8.1-1kurento2.18.04                           amd64        GStreamer plugin for ALSA
ii  gstreamer1.5-libav:amd64               1.8.1-1kurento1.18.04                           amd64        libav plugin for GStreamer
ii  gstreamer1.5-libav-dbg:amd64           1.8.1-1kurento1.18.04                           amd64        libav plugin for GStreamer (debug symbols)
ii  gstreamer1.5-nice:amd64                0.1.18-0kurento1.18.04                          amd64        ICE library (GStreamer 1.5 plugin)
ii  gstreamer1.5-nice-dbgsym:amd64         0.1.18-0kurento1.18.04                          amd64        debug symbols for gstreamer1.5-nice
ii  gstreamer1.5-plugins-bad:amd64         1.8.1-1kurento5.18.04                           amd64        GStreamer plugins from the "bad" set
ii  gstreamer1.5-plugins-bad-dbg:amd64     1.8.1-1kurento5.18.04                           amd64        GStreamer plugins from the "bad" set (debug symbols)
ii  gstreamer1.5-plugins-base:amd64        1.8.1-1kurento2.18.04                           amd64        GStreamer plugins from the "base" set
ii  gstreamer1.5-plugins-base-dbg:amd64    1.8.1-1kurento2.18.04                           amd64        GStreamer plugins from the "base" set
ii  gstreamer1.5-plugins-good:amd64        1.8.1-1kurento5.18.04                           amd64        GStreamer plugins from the "good" set
ii  gstreamer1.5-plugins-good-dbg:amd64    1.8.1-1kurento5.18.04                           amd64        GStreamer plugins from the "good" set
ii  gstreamer1.5-plugins-ugly:amd64        1.8.1-1kurento1.18.04                           amd64        GStreamer plugins from the "ugly" set
ii  gstreamer1.5-plugins-ugly-dbg:amd64    1.8.1-1kurento1.18.04                           amd64        GStreamer plugins from the "ugly" set (debug symbols)
ii  gstreamer1.5-pulseaudio:amd64          1.8.1-1kurento5.18.04                           amd64        GStreamer plugin for PulseAudio
ii  gstreamer1.5-x:amd64                   1.8.1-1kurento2.18.04                           amd64        GStreamer plugins for X11 and Pango
ii  kms-core                               6.15.0-0kurento1.18.04                          amd64        Kurento Core module
ii  kms-core-dbg                           6.15.0-0kurento1.18.04                          amd64        Kurento Core module
ii  kms-elements                           6.15.0-0kurento1.18.04                          amd64        Kurento Elements module
ii  kms-elements-dbg                       6.15.0-0kurento1.18.04                          amd64        Kurento Elements module
ii  kms-filters                            6.15.0-0kurento1.18.04                          amd64        Kurento Filters module
ii  kms-filters-dbg                        6.15.0-0kurento1.18.04                          amd64        Kurento Filters module
ii  kms-jsonrpc                            6.15.0-0kurento1.18.04                          amd64        Kurento JSON-RPC library
ii  kms-jsonrpc-dbg                        6.15.0-0kurento1.18.04                          amd64        Kurento JSON-RPC library
ii  kmsjsoncpp                             1.6.3-1kurento1.18.04                           amd64        Kurento jsoncpp library
ii  kmsjsoncpp-dbg                         1.6.3-1kurento1.18.04                           amd64        Kurento jsoncpp library
ii  kurento-dbg                            6.15.0-0kurento1.18.04                          amd64        Meta-package that installs debug symbols
ii  kurento-media-server                   6.15.0-0kurento1.18.04                          amd64        Kurento Media Server
ii  kurento-media-server-dbg               6.15.0-0kurento1.18.04                          amd64        Kurento Media Server
ii  libgstreamer-plugins-bad1.5-0:amd64    1.8.1-1kurento5.18.04                           amd64        GStreamer development files for libraries from the "bad" set
ii  libgstreamer-plugins-base1.5-0:amd64   1.8.1-1kurento2.18.04                           amd64        GStreamer libraries from the "base" set
ii  libgstreamer1.5-0:amd64                1.8.1-1kurento2.18.04                           amd64        Core GStreamer libraries and elements
ii  libgstreamer1.5-0-dbg:amd64            1.8.1-1kurento2.18.04                           amd64        Core GStreamer libraries and elements
ii  libnice10:amd64                        0.1.18-0kurento1.18.04                          amd64        ICE library (shared library)
ii  libnice10-dbgsym:amd64                 0.1.18-0kurento1.18.04                          amd64        debug symbols for libnice10
ii  libsrtp0:amd64                         1.6.0-0kurento1.18.04                           amd64        Secure RTP (SRTP) and UST Reference Implementations - shared library
ii  libusrsctp                             0.9.2-1kurento1.18.04                           amd64        sctp-refimpl library
ii  openh264                               1.4.0-1kurento1.18.04                           amd64        OpenH264 library
ii  openh264-gst-plugins-bad-1.5:amd64     1.8.1-1kurento5.18.04                           amd64        GStreamer plugins from openh264
ii  openwebrtc-gst-plugins                 0.10.0-1kurento1.18.04                          amd64        OpenWebRTC specific GStreamer plugins
ii  openwebrtc-gst-plugins-dbg             0.10.0-1kurento1.18.04                          amd64        OpenWebRTC specific GStreamer plugins

[github-actions[bot]]

Hello @darrenhp! :wave: we're sorry you found a bug... so first of all, thank you very much for reporting it.

To know about progress, check in Triage. All issues are considered Backlog Candidates until work priorities align and the issue is selected for development. It will then become part of our official Backlog.

[kfbixc]

Hello, when is this going to be fixed? I wonder to know it is gstreamer element question or system compatibility question？thank you