Wowza Community

VOD Microsoft Smooth Streaming is CHOPPY at high video resolutions

Hi,

I am doing some tests with the VOD application for HLS, SilverLight and RTMP playback. It works fine in all of them with low resolution media files but when it comes to HD I have been encountering problems for SilverLight(MSS) playback.

At the end of my comment you will see the file that I am trying to stream with SilverLight but the result I get is choppy. Again HLS and RTMP streaming works ok.

This is not a network related problem since the server is running in my localhost. The cpu and memory usage seem normal.

I wonder if there is some server tuning that should be done to solve this issue.

Thanks for any answer that can help me find what is wrong.

Miguel

General

Complete name : C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.0.6\content\thor.mp4

Format : MPEG-4

Format profile : Base Media

Codec ID : isom

File size : 1.64 GiB

Duration : 1h 52mn

Overall bit rate mode : Variable

Overall bit rate : 2 095 Kbps

Encoded date : UTC 2014-02-06 06:59:09

Tagged date : UTC 2014-02-06 06:59:09

Video

ID : 1

Format : AVC

Format/Info : Advanced Video Codec

Format profile : High@L4.1

Format settings, CABAC : Yes

Format settings, ReFrames : 4 frames

Codec ID : avc1

Codec ID/Info : Advanced Video Coding

Duration : 1h 52mn

Bit rate : 1 997 Kbps

Maximum bit rate : 15.2 Mbps

Width : 1 920 pixels

Height : 800 pixels

Display aspect ratio : 2.40:1

Frame rate mode : Constant

Frame rate : 23.976 fps

Color space : YUV

Chroma subsampling : 4:2:0

Bit depth : 8 bits

Scan type : Progressive

Bits/(Pixel*Frame) : 0.054

Stream size : 1.56 GiB (95%)

Writing library : x264 core 135 r2 f0c1c53

Encoding settings : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=36 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=1997 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=31250 / vbv_bufsize=31250 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00

Encoded date : UTC 2014-02-06 06:59:09

Tagged date : UTC 2014-02-06 06:59:30

Color primaries : BT.709

Matrix coefficients : BT.709

Audio

ID : 2

Format : AAC

Format/Info : Advanced Audio Codec

Format profile : LC

Codec ID : 40

Duration : 1h 52mn

Bit rate mode : Variable

Bit rate : 93.8 Kbps

Maximum bit rate : 105 Kbps

Channel(s) : 2 channels

Channel positions : Front: L R

Sampling rate : 48.0 KHz

Compression mode : Lossy

Stream size : 75.2 MiB (4%)

Language : English

Encoded date : UTC 2014-02-06 06:59:28

Tagged date : UTC 2014-02-06 06:59:30

Hello there and welcome to the Wowza support forum.

Can you please test this with one of the higher bitrate files Wowza provides for testing purposes?

You can find examples to test with in this guide. Please make sure to follow this guide for configuring ABR streaming:

How to do adaptive bitrate streaming

Here is the link to the downloadable files.

Thank you,

Salvadore

That’s great news, thanks for the update and glad to hear its working for you now.

Salvadore

The problem I had was due to my Silverlight player. I tried with another computer and it worked fine.

Thanks