Hi thanks for your reply.
It looks like you are in H.264 mode... Under Export settings, Format needs to be: FLV|F4V then go under Multiplexing and choose FLV.
Then choose CBR 2-Pass and that will replicate it.
I am using version 18.104.22.168 of Adobe Media Encoder on Windows, but I think all versions had this issue.
Sorry I meant looks like you are in F4V mode...(I said H.264).... Once you choose FLV/F4V which you have for Format at the top of the window. Then under the bottom tabs under Sumamry (Filters, Format, Video, Audio etc) choose Format:Basic Settings:Multiplexing: FLV
Hope that clarifies, and thanks again.
You are correct, I can replicate that, but what happens is that the undershoot and overshoot % change from single pass to 2-pass, so it does not seem illogical that even though you are using CBR, there is some bit allocation to harder parts (not really CBR) and less to easier parts. You have to keep in mind that although it is called CBR, it is not really Constant BR, but approximates it. Then a second pass can improve the difficult parts slightly. Notice that single pass gives 90% undershoot and 2-pass gives 80-120% undershoot-overshoot with 80% variability. So effectively it is kind of VBR.
Thanks again for the reply. The next question would be, is One Pass CBR then the only true CBR (or best for streaming/pseudo streaming)?
Adobe's Docs skipped right over that (2 Pass and CBR)...seems pretty important, maybe they figure most will just use One Pass for CBR.
The funny thing is you can't find any real references on the web to Two Pass CBR either. Even Google wants me to change it to VBR Two Pass in my searches :-)
The reason I ask is that when we ran Two Pass CBR, it flagged an error on the HTTP Psuedo Stream server (similar to Xmoov PHP) because it exceeded the bitrate limit at a portion of the video (evidentially) and stopped it in its tracks... Unless maybe it was a coincidence but it was tried several times supposedly. I didn't witness this, because we don't have access to the client's Intranet/VPN (long story). I built a JWPlayer/Xmoov PHP setup at our site to replicate, but it doesn't have the bandwidth throttling enabled to test that theory. I will try to run some more tests and post back here if I find the anomaly.
I much prefer VBR 2-Pass anyway for quality but you can't really stream it effectively.