(Non)Standard MPEG2 Frames IBBP...
Posted: Sat Aug 11, 2007 3:19 pm
Hi,
I've been using MPEG2 for my recordings for numerous reasons. Yet some of my channels (even updated/rescanned) provide nonstandard MPEG2 frames compared to standard IbbPbbPbbPbbI (uncapitalized for counting) structure.
The nonstandardization can be anything within the same stream like: IPPPPIIPbbPbbII... (I can even provide short clips which can demonstrate this). This causes the size of MPEG2 go twice or more depending how much the B-frames are replaced with P-frames even worse with I-frames...
The similar channels; where everything else is same (e.g:720x756,4/3,192kbps,1ch ....) except this behavior, provide reasonable recording sizes with the standard frame structure.
So I'd like to ask what can be cause of this? I don't suspect the following; LNB, Dish, cable, SS2 or other hardware since this phenomenon affects only 3-4 channels among 200+ AFAIK. What's left is; TechniSat v4.4 Drivers, ProgDVB v4 latest, Transponders and the Broadcast itself...
Can anyone please explain or even better guide me on this?
Thank you...
I've been using MPEG2 for my recordings for numerous reasons. Yet some of my channels (even updated/rescanned) provide nonstandard MPEG2 frames compared to standard IbbPbbPbbPbbI (uncapitalized for counting) structure.
The nonstandardization can be anything within the same stream like: IPPPPIIPbbPbbII... (I can even provide short clips which can demonstrate this). This causes the size of MPEG2 go twice or more depending how much the B-frames are replaced with P-frames even worse with I-frames...
The similar channels; where everything else is same (e.g:720x756,4/3,192kbps,1ch ....) except this behavior, provide reasonable recording sizes with the standard frame structure.
So I'd like to ask what can be cause of this? I don't suspect the following; LNB, Dish, cable, SS2 or other hardware since this phenomenon affects only 3-4 channels among 200+ AFAIK. What's left is; TechniSat v4.4 Drivers, ProgDVB v4 latest, Transponders and the Broadcast itself...
Can anyone please explain or even better guide me on this?
Thank you...
