I'm using a Mac tower, dual hex core, 16gb mem, a real beefy computer that's normally used for video editing. I'm using this in conjunction with a Blackmagic Decklink Studio capture card, which is receiving 1080i 59.94fps video.
I have the following Flash Media Live Encoder (FMLE) settings:
H.264 Level 5.1, keyframe frequency 2 seconds
30fps Frame Rate (for output)
1920x1080 input size, with "maintain aspect ratio" checked
2 renditions, one at 2200kbps/1280x720 resolution, one at 600kbps/320x180kbps
Audio is in AAC format, stereo, 44.1khz, 128kbps bit rate
I'm streaming this to a Flash Media Server (FMS) on Akamai.
I keep getting a fair amount of jitter. I've tried many many combinations and permutations of settings, but to no avail. The settings listed are the settings that seem to minimize jitter most effectively for my setup. Even so, when the output is viewed on Akamai, the video is jumpy, freezing frames for a fraction of a second, or seemingly skipping frames. Even when I change the output video to 1920x1080 (because I've read that making the input/output the same resolution helps), I still get this slight jitter effect.
The output statistics are standard. No drops, no buffer, constant frame rate output, everything looks to be operating properly.
Does anyone have any suggestions on what to try next? I've also tried running FMLE from the command line on my Mac, but I keep having troubles with the FMS authentication, so I don't know if that would help or not.
I've tried contacting Adobe a few times now, but it seems that Adobe does not have a dedicated team to this product like its others, and getting support for this product over phone or chat has been surprisingly difficult.