TMPGenc exceeds max bitrate

[digitalfreaknyc]

Why does TMPGenc exceed the max bitrate when you set it? I keep trying to re-encode a piece of video and for some reason, i set the max bitrate at 8000 kbps and it will sometimes go above 10000. Am I doing something wrong?? I'm using 2-pass VBR.

[manono]

Hi-

How do you know it goes above 10000? What are you using to check? Are you unable to author? What are you using to author? Even with WAV audio, or full bitrate DTS, 8000 should be plenty low, even if it does go a little bit over the limit sometimes. Remember, any authoring app that warns you about being over the limit when you just open the assets, doesn't know what it's talking about. Ignore any warnings and go ahead and author.

[digitalfreaknyc]

I'm using DVD-Lab. When i try to author, I'll get an error when it spikes above 10000 and it's muxing. It shuts down. There's a bitrate viewer on DVD-Lab and it shows the peak.

I just ran it again. I set the max at 8000. The peak (according to DVD-lab) is 11460.

I set the average to 8000. I'm told the average is 9037.

[guns1inger]

verify with bitrate viewer as well.

Which version of tempgenc are you using ? I know there were some early versions that had a tendency to spike, but this was resolved.

[FulciLives]

I'm using DVD-Lab. When i try to author, I'll get an error when it spikes above 10000 and it's muxing. It shuts down. There's a bitrate viewer on DVD-Lab and it shows the peak.

I just ran it again. I set the max at 8000. The peak (according to DVD-lab) is 11460.

I set the average to 8000. I'm told the average is 9037.

What bitrates are you using for the audio file(s)?

Remember that adds to the video bitrate to get the total.

I think subtitles count as well but not by very much if I recall.

- John "FulciLives" Coleman

[digitalfreaknyc]

I'm not even dealing with the audio. This is video only.
I was actually muxing it with a very small 192kbps file.
No subtitles at all.

[BJ_M]

as asked before -- which version of tmpgenc are you using ? as this used to be a standard problem , but has been resolved ...

[digitalfreaknyc]

Sorry. I just got home.

2.524.63.181
Core version 2.04.169

[digitalfreaknyc]

I checked bitrate viewer. it put my average around 9500 and it spiked up to 11000.

I used DVD Bit Rate Viewer and it gave me #'s that were closer to what I "supposedly" did with TMPGenc.

Why are they varying so greatly?

[manono]

Bitrate Viewer can't be trusted for NTSC as it gives numbers that are too high, about 18% too high by my figuring.

DVD Bit Rate Viewer is pretty accurate, but it's for video, audio, subs, and overhead, the whole thing together, and therefore not much use for video alone.

As far as I know, the only really accurate video bitrate reader is found in a new version of DGIndex. It only gives the average though, and there's no way you can see the spikes. Open the MPV, M2V or VOB. Set Options->Playback Speed->Maximum and then File->Preview. You'll see the running average in the Info screen that opens up. It might take a while to complete as it reads every frame.

[BJ_M]

Bitrate Viewer can't be trusted for NTSC as it gives numbers that are too high, about 18% too high by my figuring.

it is very good actually - in the registered version -- also it is is for a raw stream , not a multiplexed stream (though it will parse them)

Ive compared its results with a very high end software package ($5000) and the results are very close .... but the registered version gave me different results than the demo version (which i cant figure out or i did something weird)