Video loops every two seconds

[ricardoschiller]

Hi,

I need to implement a small streaming app in Windows 8 Metro, XAML/C#. I've been using the smooth streaming client beta version from Microsoft, and it works fine with the sample streams. But with the ones I need to show, it loops every two seconds, always to the beginning of the video and audio. It's as if the player is stuck in the first chunk of the stream. The streams come from a wowza server, and it works fine in Silverlight and WP7. Using fiddler, I've noticed that no request gets chached, contrary to other working examples. Has anyone had a similar problem? I'm really stuck with this...



Thanks in advance,

Ricardo

[rrlanham]

Ricardo,

How was the file encoded, which encoder, encoding details? Does it have audio and video (you need both for smoothstreaming)?

Take a look at these encoding suggestions

http://www.wowza.com/forums/content....ideo-on-Demand

Richard

[ricardoschiller]

Hi Richard,

I'm not sure about the encoder, it's a client stream and I do not have access to the configurations. But I've seen the HTTP requests with fiddler, and I believe it is encoded with aac. The format is H.264, that I am sure. I don't know if it is playready or not.

[ricardoschiller]

Hi again,

I've managed to make some more tests with fiddler enabled, and recorded the manifests and url requests of the video from Microsoft that works property, and from the stream that is not working. Possibly this information could help determine the problem. I omitted some repeating parts of requests and xml just to facilitate Reading. The client stream url was also removed.


MICROSOFT - WORKING - MANIFEST:

<SmoothStreamingMedia
MajorVersion="1"
MinorVersion="0"
Duration="5965419999">
<StreamIndex
Type="video"
Subtype="WVC1"
Chunks="299"
Url="QualityLevels({bitrate})/Fragments(video={start time})">
<QualityLevel
Bitrate="2750000"
FourCC="WVC1"
Width="1280"
Height="720"
CodecPrivateData="250000010FD3BE27F1678A27F859E804 508253EBE8E6C00000010E5AE7F840" />
<QualityLevel
Bitrate="2040000"
FourCC="WVC1"
Width="1056"
Height="592"
CodecPrivateData="250000010FD3BE20F1278A20F849E804 50823E414DD1400000010E5AE7F840" />
<QualityLevel
Bitrate="1520000"
FourCC="WVC1"
Width="848"
Height="480"
CodecPrivateData="250000010FCBAE1A70EF8A1A783BE804 5081AE62F3F7400000010E5AE7F840" />
<QualityLevel
Bitrate="1130000"
FourCC="WVC1"
Width="704"
Height="400"
CodecPrivateData="250000010FCBA215F0C78A15F831E804 5081A27BD635C00000010E5AE7F840" />
<QualityLevel
Bitrate="845000"
FourCC="WVC1"
Width="576"
Height="320"
CodecPrivateData="250000010FCB9A11F09F8A11F827E804 508199C94077400000010E5AE7F840" />
<QualityLevel
Bitrate="630000"
FourCC="WVC1"
Width="448"
Height="256"
CodecPrivateData="250000010FCB920DF07F8A0DF81FE804 508113396020C00000010E5AE7F840" />
<QualityLevel
Bitrate="470000"
FourCC="WVC1"
Width="368"
Height="208"
CodecPrivateData="250000010FC38E0B70678A0B7819E804 50810E5747B6C00000010E5AE7F840" />
<QualityLevel
Bitrate="350000"
FourCC="WVC1"
Width="320"
Height="176"
CodecPrivateData="250000010FC38A09F0578A09F815E804 50808AADEACF400000010E5AE7F840" />
<c
n="0"
d="20000000" />
<c
n="1"
d="20000000" />
<c
n="2"
d="20000000" />
<c
n="3"
d="20000000" />

…
…
…

<c
n="298"
d="5000001" />
</StreamIndex>
<StreamIndex
Type="audio"
Subtype="WmaPro"
Chunks="299"
Url="QualityLevels({bitrate})/Fragments(audio={start time})">
<QualityLevel
Bitrate="64000"
WaveFormatEx="6201020044AC0000451F0000CF0510001200 1000030000000000000000000000E00042C0" />
<c
n="0"
d="20433560" />
<c
n="1"
d="19969161" />
<c
n="2"
d="19969161" />
<c
n="3"
d="20433560" />

…
…
…

<c
n="298"
d="4393197" />
</StreamIndex>
</SmoothStreamingMedia>


MICROSOFT - WORKING - REQUESTS:

"http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/QualityLevels(350000)/Fragments(video=0)"
"http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/QualityLevels(350000)/Fragments(video=20000000)"
"http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/QualityLevels(64000)/Fragments(audio=20433560)"
"http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/QualityLevels(845000)/Fragments(video=60000000)"
"http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/QualityLevels(1130000)/Fragments(video=80000000)"


*********************************************
*********************************************
*********************************************


CLIENT STREAM - NOT WORKING - MANIFEST:

<SmoothStreamingMedia MajorVersion="2" MinorVersion="1" Timescale="10000000" Duration="430000000">
<StreamIndex Type="audio" Index="0" Chunks="22" QualityLevels="1" Timescale="10000000" Url="QualityLevels({bitrate})/Fragments(audio={start time})/Chunks({chunk id})/WowzaSessions(2001798323).isma">
<QualityLevel Bitrate="48666" FourCC="AACL" SamplingRate="44100" Channels="2" BitsPerSample="16" PacketSize="4" AudioTag="255" CodecPrivateData="1210" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20210000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20210000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20200000" />
<c d="20210000" />
<c d="20200000" />
<c d="20200000" />
<c d="5570000" />
</StreamIndex>
<StreamIndex Type="video" Chunks="16" QualityLevels="3" MaxWidth="720" MaxHeight="576" DisplayWidth="720" DisplayHeight="576" Timescale="10000000" Url="QualityLevels({bitrate})/Fragments(video={start time})/Chunks({chunk id})/WowzaSessions(2001798323).ismv">
<QualityLevel Index="0" Bitrate="979971" FourCC="H264" MaxWidth="720" MaxHeight="576" CodecPrivateData="00000001674d401eeca05a0934200000 03002000000641e2c5b2c00000000168eaecb2" />
<QualityLevel Index="1" Bitrate="192894" FourCC="H264" MaxWidth="720" MaxHeight="576" CodecPrivateData="00000001674d401eeca05a0934200000 03002000000641e2c5b2c00000000168eaecb2" />
<QualityLevel Index="2" Bitrate="489564" FourCC="H264" MaxWidth="720" MaxHeight="576" CodecPrivateData="00000001674d401eeca05a0934200000 03002000000641e2c5b2c00000000168eaecb2" />
<c d="30000000" />
<c d="30000000" />
<c d="23600000" />
<c d="20400000" />
<c d="30000000" />
<c d="30000000" />
<c d="30000000" />
<c d="30000000" />
<c d="23200000" />
<c d="30000000" />
<c d="30000000" />
<c d="30000000" />
<c d="30000000" />
<c d="23200000" />
<c d="30000000" />
<c d="9600000" />
</StreamIndex>
</SmoothStreamingMedia>


CLIENT STREAM - NOT WORKING - REQUESTS:

"http://[...]/smil:13616116-L/QualityLevels(192894)/Fragments(video=0)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(192894)/Fragments(video=30000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(192894)/Fragments(video=60000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(489564)/Fragments(video=83600000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(489564)/Fragments(video=104000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(489564)/Fragments(video=134000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(979971)/Fragments(video=164000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"
"http://[...]/smil:13616116-L/QualityLevels(979971)/Fragments(video=194000000)/Chunks(%7Bchunk%20id%7D)/WowzaSessions(2001798323).ismv"


*********************************************
*********************************************
*********************************************
I do not understand much about how these requests should work, but it seems to me that they are working fine. I mean, the video fragments show increasing numbers at each request. But on the application, the video is always looping every two seconds, and the looping is very synchronized with the requests made.


I would really appreciate if someone could solve this enigma .

Thanks again,

Ricardo Schiller

[charlie]

I think the problem is with the way requests are being formatted. This part of the URL looks wrong:

Chunks(%7Bchunk%20id%7D)/

When we get a chance we will work on the Metro setup to see if we can get it to work.

Charlie

[ricardoschiller]

Thank you for the quick reply .

I've tried the main stream url in silverlight and WP7 and it works, but I haven't used fiddler to determine if there are any changes it the http requests. I'll get to that today.
Could you give me an ideia of how the url should look like? Maybe I can intercept the http call and change the utl accordingly.


Thank you ,

Ricardo

[charlie]

I don't think it is something you can fix. We need to switch our VOD streaming smooth streaming implementation to use the /Fragments lookup method rather than /Chunks. I do not believe the /Chunks method is supported in the newer smooth streaming implementation.

Charlie

[ricardoschiller]

Thank you Charlie.

But where do I go from here? Is there anything I can do in order to make this work? Is there any other streaming configuration that uses only the Fragments instead of Chunks?
I believe my client would be willing to change some configurations. I really do not fully understand what we are talking about here, but if some samples work, these could work too if property configured, right?

[charlie]

I need to fix it on my end and release a patch. I will try to do this in the next week or so. Live streaming should work it is just VOD that has this problem. So there is nothing you can do until I fix this.

Charlie

[ricardoschiller]

Thank you very much for your help Charlie. We will be waiting for the patch . We will also be very grateful if you could speed the release of the patch - just because we want to enter an application development contest, and there is a time limit for that. The sooner the better . Anyway, you have been a great help.

I'm having problems sending you a private message with the stream url, just in case if you want to use it as a test example. If you need it, just ask and I'll send it right away .


Thanks again Charlie!