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  1. Member dellsam34's Avatar
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    Jan 2016
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    I'm trying to capture some Studio Betacam SP tapes with the Sony J-3 deck using the SDI port of the deck, I'm capturing with BlackMagic UltraStudio SDI to USB device, I set the capture parameters to 525i/59.94 NTSC and AVI 10Bit YUV. Now for short clips it's all good, But when I capture long clips I start to get audio delay. I did a disc speed test with BlackMagic utility and shows for NTSC/PAL SD it should be good to go (This is my son's computer, mine doesn't have USB 3.0 port. It is AMD A6-7310 4GB RAM Win10 64Bit should enough for SD materials):



    The other problem is for whatever reason, BlackMagic's Media Express capture app shows 720x486 instead of 720x480, Also there is no aspect ratio flag in the captured file but I guess that comes later after encoding the final files:

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  2. For SDI capture you need something better than 169.5 MB/s, that is why you are having issues, use SSD RAID 0. For blackmagic the mored SSD you put in RAID the better.
    https://www.youtube.com/watch?v=JPuywNBctvg

    Your system memory is too low, 4 GB of memory is the bare minimum required, because 4 GB is to be used by the software, you have to add an extra for your system so you need at least 8 GB . I'm working with 16 GB and depending of what I'm doing Davici complains that my system memory is too low.

    About the 720x486, BM captures the whole signal it receives in 1:1 ratio or if the source flag something else like 5:4, 4:3, etc. if you need to force a 16:9 on SD source, you have to change it in the Media Express settings.
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  3. Member dellsam34's Avatar
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    Thanks for the reply, It's one of those all in one computers where the guts are built into the screen, But I will find a way to upgrade the HDD and the memory if that's possible, I will be capturing 4:3 materials so I don't need to force 16:9 unless it adds the black bars on the sides of the frame so the 4:3 aspect ratio is preserved.

    Oh ok here is what I need to do, I have a similar machine:
    https://www.youtube.com/watch?v=uOF6yrEY6z8
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  4. Member Cornucopia's Avatar
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    Btw, 720x486 is appropriate for pro SD material captures. It's still 4:3 (unless videographer was going anamorphic, then 16:9). No other options are valid. Capture that way, then crop during editing, if necessary.

    Scott
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  5. Member dellsam34's Avatar
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    I think I'll just leave it alone and save one step processing, 6 lines is not going to significantly affect the aspect ratio I guess.
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  6. Member dellsam34's Avatar
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    I put in a 8GB RAM and 1TB SSD and did the test again and the results tripled, I will have to do a long capture test to make sure the audio sync problem is fixed, If not then it has to be the processor:

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