The video output of Animate CC has no compression, as far as I know.
So send this video to Adobe Media Encoder or any other video tool and export as a sequence of PNGs from there.
I'm experiencing the same problem when exporting in Animate CC to a PNG sequence.
I can't seem to figure out what you mean with "the video output of Animate CC has no compression".
Exporting to MOV seems to have no problems with the camera movements... I can't think of any reason why this should be a problem when exporting the same animate CC file to a PNG sequence.
Sending the MOV file to Media Encoder and export it there to PNG is a workaround but it slows down my workflow.
The camera is controlled by code, and so doesn't do anything if you're exporting an image sequence.
The MOV is using Apple's Animation codec, which is a lossless compressor. The option to generate an alpha instead of the stage color works too, you could export the MOV with an alpha, then in Media Encoder export the PNG sequence, with each image having an alpha too.
What is your reason for making a PNG sequence?
As an animater (both 2d and 3d) i always work with sequences of frames rather then with parts of movies. Its the way i have been working the past 20 years.
I do wonder how difficult it would be for adobe to just let the animation be exported from the canvas as it is to a png sequence. I see the camera animation clearly on the screen... so a frame by frame export of that shouldnt be all that much to ask.
The UI is also doing whatever code is needed to make you see that. I feel sure that it's on the list of features the Animate team would like to do though, I mean, it should be able to reuse the export to video code, only save stills instead of of a video file.
What do you do with the image sequence, once you have one?