services/etc/av_codec_service.cfg

{
    "services" : [{
        "name" : "av_codec_service",
        "path" : ["/system/bin/sa_main", "/system/profile/av_codec_service.json"],
        "uid" : "media",
        "gid" : ["media_rw", "system", "vcodec", "dev_dma_heap", "netsys_socket", "vendor_mpp_driver"],
        "secon" : "u:r:av_codec_service:s0"
        }
    ]
}