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How to synchronize audio video stream (a/v sync) No ratings yet.

How to a/v sync in IETF RFC? The RFC specified how to do a/v sycn generally in  https://tools.ietf.org/html/rfc6051 RTP flows are synchronised by receivers based on information that is contained in RTCP SR packets generated by senders (specifically, the NTP-format timestamp and the RTP timestamp). Synchronisation requires that a common reference clock MUST be used • Read More »


Hadoop : A Single Node Cluster on debian 8 No ratings yet.

The core part of hadoop inlcudes HDFS and map/reduce.  There are many projects around hadoop.  Data lake is often associated with hadoop-oriented object storage. Now trying the hadoop ( on debian 8 ) is quite easy. How to setup Following the https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html (1) apt-get install openjdk-7-jdk sudo rsync wget http://www.motorlogy.com/apache/hadoop/common/current/hadoop-2.7.2.tar.gz tar -zxvf hadoop-2.7.2.tar.gz vi etc/hadoop/hadoop-env.sh, change: export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64 • Read More »