8 bit image import

jsljustin Website User Posts: 72

Hi guys,

just a quick question. Earlier I did a test animation image sequence render from Vue (e-on software). It has alpha and other channels.

Basically, I have 3 image sequence sets, the first is 24 bit .bmp files (250 of them), the other two sets are 8 bit .bmp files.

The 24 bit .bmp image sequence imported no problem into hitfilm 3 Pro, but the other 2 sets did not. At first I thought it may have been a filenaming issue, but I renamed to NameXXX.bmp and this didn't fix it.

Does Hitfilm not open 8 bit images as an Image sequence? I tried opening the individual files, no problems, but all I get when trying to import the Image sequence is an exclamation mark with the words "File Error".  Right clicking on it tells me "Invalid Media".

Any clues? Is this a known issue or limitation? Thanks for any help.



  • CedricBonnier
    CedricBonnier Staff Administrator, HitFilm Beta Tester Posts: 1,192 Staff

    Hi Justin,

    Thanks for reporting this, it doesn't sound normal. Let me investigate a bit more and I'll post here as soon as we've got more info.

    In the meantime I would suggest that you use another format to export image sequences or convert your existing ones to 24-bit BMPs.

  • Triem23
    Triem23 Moderator Moderator, Website User, Ambassador, Imerge Beta Tester, HitFilm Beta Tester Posts: 18,991 Ambassador

    To speculate here, an 8-bit image, of course, only has a palette of 256 colors and has to contain the palette information in the file.  In an image sequence it may be possible that the palettes are not identical--either different colors, or a different order in the LUT. Now a GIF sequence shares a common palette across the entire sequence, but BMP sequences are a different kettle O' fish. 

    Do you have anything to batch your BMPs to JPEG or PNG? Going to 24 bits should eliminate all issues.  

  • jsljustin
    jsljustin Website User Posts: 72

    Thanks for the replies, gents. It isn't a huge issue with this particular set of image sequences, and I can certainly convert or re-export into 24 bit. The image sequences that aren't importing that are 8 bit are basically masks / alpha channels that correspond to the main 24bit sequence, and are both grayscale, so I'm guessing that's why vue has set them to 8bit exports, as a large palette is not needed.

    The strange thing is that it just appears to be a problem just with importing these .bmp's as an image sequence. I was able to import the 8 bit bmp files no problem as single images into HF3P.

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!