I read somewhere that the frames are returned in decode order instead of presentation order when using AVAssetReader. The documentation seems sparse on the subject. I have so far failed to find a video file where the frames are not returned in presentation order.
Can anyone confirm the frames are actually returned in decode order?
From my testing, when using nil in the output settings, we can indeed get frames that are out-of-order from a presentation PoV. (For the same video with non-nil output settings, I did not get out-of-order frames.)
Using nil output settings, we also do not get any image data (at least with the movie I tested), so it’s not very useful anyways…
I’d very much like to get more info if possible. Might even open a DTS if I do not get feedback after a while…
