Re: [Mjpeg-users] mpeg2enc 1.6.2: maximum allowable -b = 15000?

[Joe F. <pen...@gm...>]

Steven M. Schultz wrote:

>>In some over-curious testing, I think I ran into an upper limit (be it 
>>unusable for any practical purpose) for -b. Any encoding with -b greater 
>>than 15000 just doesn't work. Does anyone have any similar experiences? 
>>
>	Let me guess - you're trying to encode HD material :)
>
>	You realize that mpeg2enc is a MP@ML encoder, right? ;)  The larger
>	frame sizes and higher bitrates belong to the higher levels - MP@HL
>	as I recall (reference books are at home).
>
Nope, just curious! I have a NTSC DV camera, and I'll be encoding for 
DVD, but I'm profiling the relationship between -b and -q for output 
sizes. Saw some cool curves and wanted to see what happened beyond 9800. 
http://viswiz.gmd.de/DVP/Public/deliv/deliv.211/mpeg/pr...@lv...m gave me 
a clue about what you were talking about (for those others here who 
aren't quite up to scratch with the lingo).


Bernhard Praschinger wrote:

>>In some over-curious testing, I think I ran into an upper limit (be it
>>unusable for any practical purpose) for -b. Any encoding with -b greater
>>than 15000 just doesn't work. Does anyone have any similar experiences?
>>
>Does anyone know the upper limit of -b for 1.6.2?Normaly you don't use bitrates over 10000Kbit/sec. 
>And 16000 is the maximal allowed bitrate. And mpeg2enc should tell you
>that with a message like that:
>**ERROR: [mpeg2enc] Bit rate is greater than permitted in specified
>Level
>
>-f 1/4/8 have lower limits.
>
According to the link I've included, 15000 is the max bitrate for MP@ML 
encoders; but, maybe it's different in the source.

Joe