Streaming Output Resolution and Issues

Hello,

We have a Decklink Studio running on an HP 4 GB Ram, 3.6 ghz computer, Intel Core 2. Our bandwidth is 5 MB up and 5 MB down.

I have HD-SDI plugged in to the correct input - coming in as 1080i60, 1920x1080. The signal comes in with no issues at all.

However, the issue lies when we go to stream this video. Using Wirecast or Flash Media Encoder, when we begin a stream, the quality of output is very poor. We have troubleshot both applications, and I believe the issue lies within the output of the Black Magic Video Card.

Any suggestions? Please help. Streaming a soccer match tonight.

what resolution do U streaming ? 5mbps is not very high .. do U deinterlace picture ? your CPU is not wery quick .. how many % in CPU power is used in streaming ?

We are actually just streaming 480p. Not even high def. Picture is already de-interlaced. Wirecast is about 90%. That isn't good.

Any suggestions?

I think.. U need better cpu.. And maybe better software..

We are actually just streaming 480p. Not even high def. Picture is already de-interlaced. Wirecast is about 90%. That isn't good.

Any suggestions?

May very well be a CPU issue.

But... one critical thing you have failed to share with us is the actual streaming parameters. Quality is not JUST determined by the frame size. It is also dependent on BIT-RATE (in fact this is of course the MAJOR determining parameter). So please tell us all the relevant data for your stream. Frame size / Bit rate / Format.

Also... What is your streaming content delivery network/partner? Depending on the CDN you are using - the stream may be re-encoded there.

And...quality of stream <can> be a somewhat subjective measure. Your source is HD and the output is SD... so there is a world of difference right there. It might be helpful if you could post some example screen-captures of the output.

On your upload/download bandwidth. You mention you have 5MB up/down. Do you really you have Mega Bytes per second or did you mean 5Mbps (Mega bit per second)? 5MBps would not be so outrageously big anyway (I've had 100MB at some venues)... but it is more than enough for a basic HD stream in any case... let alone a lower bit-rate SD stream.

And... whatever Pytkin's opinions about Wirecast - there are many of us who use it for streaming and it works for the rest of us just fine.

EDIT: You also say you believe the problem is with the Decklink Studio - but you don't share any reason why you think that is the case. Please share what you think is the issue there. One sure-fire test is to run a capture using Media Express of the full HD video you are feeding it. Of course - unless your system is setup to record the uncompressed video (RAID'ed Hard Drives) - you will need to select a compressed format in media express - such as Motion JPEG.

It differs from settings.. With x264 i can stream with same resolution and bitrate from 12% cpu to 97% ..