I'm writing an iOS app to fetch motion jpeg stream via a tcp connection as in-memory data.
but the frame couldn't just save as a jpg file.
From what I googled, it seems like MJPEG frame doesn't have DHT like JPEG does,
but how to generate a DHT and put it into a mjpeg frame.
I also found few third-party libs like libjpeg-turbo, ffmpeg may accomplish that.
But most of the examples only show how to do it simply give an URL not in-memory data.
If you've done this in C/Objective-C before, hope you can tell me.
In the meantime, I'll keep searching for the answer.
and thanks for your time!
UPDATE:
Now I'm using DFJPEGTurbo and replace its libjpeg-turbo with the latest version.
It's easy to re-wrap mjpeg frame to a UIImage object.
It's the best way I've found, don't know if there's a better way.
and how can I do "ffmpeg -i {MJPEG_FILE} outputframe%d.jpg" programmatically?