[Galaxy Tab Pro 12.2, 10.1, 8.4 Original Android De] Alexey71:
Guys I have good news. I found the cause hang video and audio of sync, applications rutube-vkontakte-google video and etc streaming services

Go to buil.prop. Comment out or delete the line av.streaming.offload.enable=true. Now everything is fine.. HW not work in mx player

And bug in the build.prop. Two identical lines with different values.

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=LRX22G
ro.build.display.id=cm_mondrianwifi-userdebug 5.0.2 LRX22G 2438515df9 test-keys
ro.build.version.incremental=2438515df9
ro.build.version.sdk=21
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=5.0.2
ro.build.date=Sat Apr 4 10:52:12 PDT 2015
ro.build.date.utc=1428169932
ro.build.type=userdebug
ro.build.user=jenkins
ro.build.host=cyanogenmod
ro.build.tags=test-keys
ro.product.brand=samsung
ro.product.name=cm_mondrianwifi
ro.product.board=MSM8974
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.cpu.abilist=armeabi-v7a,armeabi
ro.product.cpu.abilist32=armeabi-v7a,armeabi
ro.product.cpu.abilist64=
ro.product.manufacturer=samsung
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=msm8974
ro.build.characteristics=tablet
ro.cm.device=mondrianwifi
# end build properties
#
# from device/samsung/mondrianwifi/system.prop
#
# display
lockscreen.rot_override=true
ro.hdcp2.rx=tz
ro.qualcomm.cabl=1
ro.secwvk=144
ro.sf.lcd_density=320

# gps
persist.gps.qc_nlp_in_use=0
ro.gps.agps_provider=1
ro.qc.sdk.izat.premium_enabled=0
ro.qc.sdk.izat.service_mask=0x0

# Media
av.streaming.offload.enable=true
[COLOR="Red"]audio.offload.gapless.enabled=true[/COLOR]
audio.offload.pcm.16bit.enable=true
audio.offload.pcm.24bit.enable=true

# radio
ro.radio.noril=yes

# CWMR Options
ro.cwm.forbid_format=/boot,/firmware,/firmware-modem
ro.cwm.forbid_mount=/boot

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.com.android.dateformat=MM-dd-yyyy
ro.carrier=unknown
dalvik.vm.heapstartsize=16m
dalvik.vm.heapgrowthlimit=192m
dalvik.vm.heapsize=512m
dalvik.vm.heaptargetutilization=0.75
dalvik.vm.heapminfree=512k
dalvik.vm.heapmaxfree=8m
ro.hwui.texture_cache_size=72
ro.hwui.layer_cache_size=48
ro.hwui.r_buffer_cache_size=8
ro.hwui.path_cache_size=32
ro.hwui.gradient_cache_size=1
ro.hwui.drop_shadow_cache_size=6
ro.hwui.texture_cache_flushrate=0.4
ro.hwui.text_small_cache_width=1024
ro.hwui.text_small_cache_height=1024
ro.hwui.text_large_cache_width=2048
ro.hwui.text_large_cache_height=1024
audio.offload.buffer.size.kb=32
[COLOR="Red"]audio.offload.gapless.enabled=false[/COLOR]
mm.enable.qcom_parser=3314291
av.offload.enable=true
ro.opengles.version=196608
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
ro.vendor.extension_library=/vendor/lib/libqc-opt.so
persist.timed.enable=true
persist.sys.isUsbOtgEnabled=true
com.qc.hardware=true
debug.egl.hw=1
debug.sf.hw=1
debug.mdpcomp.logs=0
persist.hwc.mdpcomp.enable=true
ro.telephony.call_ring.multiple=0
ro.error.receiver.system.apps=org.cyanogenmod.bugreport
ro.rommanager.developerid=cyanogenmodnightly
ro.com.google.clientidbase=android-google
keyguard.no_require_sim=true
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.android.wifi-watchlist=GoogleGuest
ro.setupwizard.enterprise_mode=1
ro.com.android.dataroaming=false
ro.build.selinux=1
persist.sys.dun.override=0
persist.sys.root_access=0
ro.cm.version=12-20150404-NIGHTLY-mondrianwifi
ro.cm.releasetype=NIGHTLY
ro.modversion=12-20150404-NIGHTLY-mondrianwifi
ro.cmlegal.url=https://cyngn.com/legal/privacy-policy
persist.sys.recovery_update=false
ro.cm.display.version=12-20150404-NIGHTLY-mondrianwifi
ro.config.notification_sound=Argon.ogg
ro.config.alarm_alert=Helium.ogg
persist.sys.dalvik.vm.lib.2=libart.so
dalvik.vm.isa.arm.features=div
dalvik.vm.lockprof.threshold=500
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt

I hope crpalmer add fixes in the next build:)