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optimum H.264 encoding for 810?



Hi, wondering what the optimum encoding settings are for a 1080p23.967 quicktime H.264 video for the Brightsign 810 are? The video technote doc mentions that quicktimes have a max bitrate of about 25mbit/sec but it's still being tested. Can anyone confirm this? Thanks

12 comments

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    RokuLyndon


    The h.264 files need to be transport streams, not mov. BUt, yes, they are supported at 25mbps, and higher up to 35Mbps.  I can email you to a link to a sample h.264 file I downloaded from mammaothhd. It's only 7mbps but good quality
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    Per Argentine


    Thanks.  In Sorenson Squeeze there isn't a stream setting, so can I assume that it encodes as a program stream?  Also, is there a specific H264 codec you recommend?  My choices are Apple H264, Sorenson H264, Sorenson H264 pro, and Main Concept H264.  Thanks again!
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    RokuLyndon


    I would start with main concept.
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    Per Argentine


    Thanks.  When I create a new brightauthor project there isn't a choice for 1080p24... is this something that will be added?  Will I have to convert my video to one of the other supported framerates?
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    RokuLyndon


    You can encode your content at any frame rate, but rates that are a factor of existing settings normally give you the best results. SO, if you're encoding at 25fps, then settings for 50 and 75 will look best. if you're encoding at 29.97 or 30, then 29.97 and 60 will look best.

    I'd just try the video first and see how it looks.
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    Per Argentine


    Thanks, I just did a test and encoded a 1080p23.967 video at 29mb/s and 34mb/s using sorenson set for main concept H264, then converted to .ts using tsmuxer.  The Brightsign 810 couldn't handle it at 34mb/s but seems to play fine at 29mb/s.  The only problem is that there seems to be a framerate issue, so next I'll try transcoding to one of the supported framerates.
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    RokuLyndon


    I know we've tested files at 45Mbps. So, it's more likely that the card couldn't handle the 34Mbps file. I have tested multiple customer files above 35mbps.

    If you're using h.264, you don't need to use bitrates so high for great quality. What's the source content you are using? And, how are you getting from that content to h.264?

    I have a 7mbps h.264 file that looks better than a 50Mbps file a customer sent me because the process the customer used to get to h.264 greatly reduced the quality of the resulting file.

    If all you're doing is playing a video, and nothing else fancy, the unit can easily play a 45Mbps video, but the card has to support it. We just don't recommend going above 35Mbps normally.
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    Per Argentine


    We were sent class 4 cards from the vendor.  The file is coming from a 1080p23.967 Avid project, exported to a quicktime reference and then encoded in sorenson squeeze.  All we'll be doing is playing the video then going to an attract loop until someone presses a button, so I'd like to get the video to the highest quality possible.
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    Miles


    I'm having problems with my video size/fps.

    I'm creating videos for 210 and am using the VGA (because the client said so).

    the project setting is (VGA) 1360 x 768 and the file i'm using is 1280 x 720 @ 30fps per the pdf about rendering videos. The monitor is reporting 1232 x772 @59 Hz and theres some vertical black margins.

    The monitor does 1366 x 768 native.

    What resolution should i render my videos at? 1366x768 or 1360 x 768@30fps or 29.97fps ?

    what about the edit preferences -> view mode "Scale to Fill" or "Fill Screen and centered"?

    I'm confused.
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    RokuLyndon


    What are you using to set the resolution on the brightsign? Do you have a brightauthor project? And, what firmware are you using on the brighgtsign.

    The video you use and the scaling settings you use won't affect this problem. It sounds like the monitor thinks it's getting a signal that' much less than 1366 but greater than 768. This is weird. I don't know if this is a unit problem, or cabling or firmware. Have you tired a different display, and different vga cables?
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    Miles


    I'm using a brightauthor project with the resolution set in the presentation properties. We have three units and are displaying the same result. I had this running on a 1080p hdtv working fine. So this is likely some type of sync problem?
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    RokuLyndon


    Can you test the same resolution over HDMI on that display?

    What screen is this, brand and model? If you startup the brightsign with no flash card, what firmware version does it list? I agree this sounds like a sync problem.
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