[FFmpeg-user] ffmpeg created prores 444 still not identified correctly by Quicktime player?

Sam Marrocco smarrocco at ringsidecreative.com
Wed May 15 15:28:05 CEST 2013

On 5/15/2013 9:16 AM, Carl Eugen Hoyos wrote:

Sam Marrocco <smarrocco <at> ringsidecreative.com> writes:

Is it possible to get the fourCC issue/fix committed

so this can be fixed?

To fix what?

FFmpeg currently does not support alpha in prores (4444).
It does support encoding opaque 444 in prores and the
resulting file plays fine with QT (afaict).

I don't recall ever mentioning alpha support in prores (4444). You are confusing something Timothy G. brought up with the original issue of this thread.

This thread, as revisited, was to restate the issue concerning the previously mentioned bug whereas quicktime movies encoded as prores 4444 with ffmpeg do not (apparently) have the fourCC set correctly. Thus, although the image contains the correct data and plays in quicktime player, quicktime player does *not* display the information regarding the file type correctly--it shows as Apple Prores 422 in the quicktime Movie Inspector, which apparently reads the fourcc value (which is incorrect).

sam marrocco | chief technical officer

248 548 2500 w
248 910 3344 c



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