Changes between Version 1 and Version 2 of Ticket #6718, comment 7


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Timestamp:
Oct 6, 2017, 12:52:45 AM (9 years ago)
Author:
ttdww

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  • Ticket #6718, comment 7

    v1 v2  
    1 From what I'm understanding, some filetypes (not sure which ones, but definitely Quicktime PNG 32bit) can get a property or metadata string added to the file which defines how the alpha should be interpreted.  Most programs I've seen that output PNG don't add one so that the image editing app importing it can force it to setting per that app.  Somehow when FFMPEG is writing it, it seems it's getting that property added and set to 'straight'.  This is my best guess, however I'm not a coder.
     1From what I'm understanding, some filetypes (not sure which ones, but definitely Quicktime PNG 32bit) can get a property or metadata string added to the file which defines how the alpha should be interpreted.  Most programs I've seen that output PNG don't add one so that the image editing app importing it can force it to it's own setting per that app.  Somehow when FFMPEG is writing it, it seems it's getting that property added and set to 'straight'.  This is my best guess, however I'm not a coder.