AviDmux - H.264 B-Frame Question...

Jynks · 14th May 2010, 20:40

Hi there..

I have been using AviDmux to encode my videos into the H.264 codec as a "2 pass average bitrate"... but then if I load up the encoded file again for any reason I get this message.

What exactly dose this mean.. and is it something I should be worried about.. What is the difference between hitting "yes or no" and is there a encoding option I can use so this dose not happen in the advance settings (That I do not use, I just leave default apart form selected bitrate)? And should I be bothered using an option to stop this at all?

Thanks in advance
Jynks

Inspector.Gadget · 14th May 2010, 20:49

Say no if you're cutting, otherwise yes. This only applies to seeking within GOPs; if you're not doing frame-specific operations, you have no need for frame accuracy.

Jynks · 14th May 2010, 20:53

I should also say yes if I am injecting a audio track?

Inspector.Gadget · 14th May 2010, 21:00

No need. Audio will be unaffected. The only time frame accuracy is implicated is if you're doing something within particular GOPs such as cutting (even joining with the safe mode should be OK because all GOPs will be complete).

Jynks · 14th May 2010, 21:01

Safe mode?

Inspector.Gadget · 14th May 2010, 21:12

Safe mode = clicking yes.

Jynks · 14th May 2010, 21:28

OK... thanks for your advise Gadget.. I appreciate it.

LoRd_MuldeR · 15th May 2010, 12:28

Just for info: Avidemux 2.5.x won't be able to handle H.264 stream (with B-Frames) in a frame-accurate way. This will be "fixed" in Avidemux 2.6

Until then I would suggest using the AVS Proxy to load H.264 streams into Avidemux. That's not an option for "cutting" tasks though...

pihug12 · 6th June 2010, 14:26

What's a good tool to cut H.264 streams then ?

LoRd_MuldeR · 6th June 2010, 14:48

Quote:

Originally Posted by pihug12

What's a good tool to cut H.264 streams then ?

With DGAVCIndex you can do basic cuts, i.e. set the start and end points. You may also want to give H264TS Cutter or TS Doctor a try.

14th May 2010, 20:40	#1 \| Link
Jynks Registered User Join Date: Apr 2004 Posts: 87	AviDmux - H.264 B-Frame Question... Hi there.. I have been using AviDmux to encode my videos into the H.264 codec as a "2 pass average bitrate"... but then if I load up the encoded file again for any reason I get this message. What exactly dose this mean.. and is it something I should be worried about.. What is the difference between hitting "yes or no" and is there a encoding option I can use so this dose not happen in the advance settings (That I do not use, I just leave default apart form selected bitrate)? And should I be bothered using an option to stop this at all? Thanks in advance Jynks

14th May 2010, 20:49	#2 \| Link
Inspector.Gadget Registered User Join Date: May 2008 Posts: 1,618	Say no if you're cutting, otherwise yes. This only applies to seeking within GOPs; if you're not doing frame-specific operations, you have no need for frame accuracy. Last edited by Inspector.Gadget; 14th May 2010 at 21:13.

15th May 2010, 12:28	#8 \| Link
LoRd_MuldeR Software Developer Join Date: Jun 2005 Location: Last House on Slunk Street Posts: 13,248	Just for info: Avidemux 2.5.x won't be able to handle H.264 stream (with B-Frames) in a frame-accurate way. This will be "fixed" in Avidemux 2.6 Until then I would suggest using the AVS Proxy to load H.264 streams into Avidemux. That's not an option for "cutting" tasks though... __________________ Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊

6th June 2010, 14:26	#9 \| Link
pihug12 Registered User Join Date: Dec 2008 Location: Toulouse (France) Posts: 24	What's a good tool to cut H.264 streams then ? Last edited by Guest; 6th June 2010 at 14:31. Reason: rule 12

14th May 2010, 20:53	#3 \| Link
Jynks Registered User Join Date: Apr 2004 Posts: 87	I should also say yes if I am injecting a audio track?

14th May 2010, 21:00	#4 \| Link
Inspector.Gadget Registered User Join Date: May 2008 Posts: 1,618	No need. Audio will be unaffected. The only time frame accuracy is implicated is if you're doing something within particular GOPs such as cutting (even joining with the safe mode should be OK because all GOPs will be complete).

14th May 2010, 21:01	#5 \| Link
Jynks Registered User Join Date: Apr 2004 Posts: 87	Safe mode?

14th May 2010, 21:12	#6 \| Link
Inspector.Gadget Registered User Join Date: May 2008 Posts: 1,618	Safe mode = clicking yes.

14th May 2010, 21:28	#7 \| Link
Jynks Registered User Join Date: Apr 2004 Posts: 87	OK... thanks for your advise Gadget.. I appreciate it.