CBR audio in WinFF?

[Diana (Cda)]

Hi,

Here is the preset for AVI XviD fullscreen in WinFF:

-f avi -r 29.97 -vcodec libxvid -vtag XVID -vf scale=640:480 -aspect 4:3 -maxrate 1800k -b:v 1500k -qmin 3 -qmax 5 -bufsize 4096 -mbd 2 -bf 2 -trellis 1 -flags +aic -cmp 2 -subcmp 2 -g 300 -acodec libmp3lame -ar 48000 -b:a 128k -ac 2

Does anyone know how to make the audio CBR, pls? I've googled several times and have found various commandline options but it's all very confusing. The above works but outputs VBR which I don't need or want.

Thanks so much in advance! I find commandline very confusing as you're given so many options in many "tutorials" but so little actual working examples and none that talk about CBR when dealing with the rest of the code for video <sigh>

[bat999]

-acodec libmp3lame -ar 48000 -b:a 128k -ac 2

Does anyone know how to make the audio CBR, pls?

That is the correct way to make CBR audio.

[Chug a Bug]

Try a more recent version of ffmpeg, suggest Zeronoe builds, older versions output CBR but wrote a VBR header which confused some softwares

[bat999]

Hi
Yes, what Chug a Bug has suggested above is true.
The version of FFmpeg that's supplied with WinFF-1.4.2 does show VBR instead of CBR.

Find ffmpeg.exe in your Program Files > WinFF folder and replace it with the latest version from Zeranoe.com.
Here ---> http://ffmpeg.zeranoe.com/builds/
This will cure the VBR problem, but some of WinFF's presets might not work properly with a different version of FFmpeg...
(For example, libfaac is not included with zeranoe's FFmpeg).

[Diana (Cda)]

Hi
Yes, what Chug a Bug has suggested above is true.
The version of FFmpeg that's supplied with WinFF-1.4.2 does show VBR instead of CBR.

Find ffmpeg.exe in your Program Files > WinFF folder and replace it with the latest version from Zeranoe.com.
Here ---> http://ffmpeg.zeranoe.com/builds/
This will cure the VBR problem, but some of WinFF's presets might not work properly with a different version of FFmpeg...
(For example, libfaac is not included with zeranoe's FFmpeg).

Hi, there! Thanks for everyone's help. I fiddled around a bit again with WinFF and gave it another test run; it's easy to crop vids which is great. I have some that have these little lines around the edges that flicker when we watch these files on my dad's flat screen TV. Very annoying. But it's been difficult finding an app that outputs AVIs that work 100% after converting and removing those flickering borders. I know there might be no relation, but I have always have audio synch troubles with converted AVIs that have VBR audio and none with the ones with CBR (go figure). Then, VirtualDub pops up error messages, too, with VBR audio and it's not a question of just switching that error off. Since I do a lot of slicing up with VirtualDub, I've learned that anything it likes plays well on my media devices whereas what it doesn't like, I invariably have troubles with audio synch (media devices - i.e., standalone DVD player, media player, flat screen TV with USB support).

I'll pop on over today to that link to get the new FFmpeg. That part is easy. But with regards to the presets, if that Widescreen ones works with CBR audio, that's all I need.

With regards to the DLL, should be a simple matter to pull it from another folder. I remember seeing it in another vid conversion app's folder.

Are these the only problems encountered, a missing DLL and presets that may not work, when replacing the FFmeg.exe in the WinFF folder?

Thanks!

[bat999]

With regards to the DLL, should be a simple matter to pull it from another folder.

No

WinFF doesn't use DLLs.

It relies on ffmpeg.exe being built with "--enable-libfaac".
Zeranoe's ffmpeg.exe is built with "--enable-libvo-aacenc" instead.

So any WinFF presets that include "-acodec libfaac ..." won't work with zeranoe FFmpeg.

[Diana (Cda)]

I got the new FFmpeg.exe file and found several versions of the dll you mention - actually, 7 of my other vid conversion apps had it so I just chose the largest and latest version and copied that into the WinFF fldr <g>. I'm just ran a preview of an AVI to convert when I saw this yellow error line:

*****************
-t is not an input option, keeping it for the next output; considering fixing your command line.
*****************

which makes me realize something ... AutoGK produces a nice log file so you have an idea of any errors AGK encounters (too bad AGK only handles AVIs!!!!!!). Is there a switch or something that will output a "log" for each converted AVI that we can add to the WinFF preset somehow? Or is there someway to retrieve the conversion info in some other way?

Thanks!

[Diana (Cda)]

With regards to the DLL, should be a simple matter to pull it from another folder.

No

WinFF doesn't use DLLs.

It relies on ffmpeg.exe being built with "--enable-libfaac".
Zeranoe's ffmpeg.exe is built with "--enable-libvo-aacenc" instead.

So any WinFF presets that include "-acodec libfaac ..." won't work with zeranoe FFmpeg.

<lol> Oh, boy, thanks for that! <g>

Well, I just checked and I don't have the libfaac listed in the preset I'm trying, so safe there.

Thanks!

[Diana (Cda)]

Find ffmpeg.exe in your Program Files > WinFF folder and replace it with the latest version from Zeranoe.com.
Here ---> http://ffmpeg.zeranoe.com/builds/
This will cure the VBR problem, ...
[snip]

So, anyone care to explain why the latest FFmpeg _doesn't_ cure the incorrect VBR headers, as I understand the problem is??????!! Yes, GSpot says audio is CBR but it would be nice not to have the error pop up in VirtualDub nonetheless ...

I just spent several hours converting files and all of them have the same problem showing VBR instead of CBR audio.

Does anyone know how to definitively fix this issue, by any chance?

I dl this FFmpeg version from the above-mentioned page: FFmpeg git-c995644 32-bit Static (Latest) (2012-11-05)

Thanks.

[bat999]

problem showing VBR instead of CBR audio.

Hi
Have you viewed these converted files with MediaInfo ?

[jman98]

Did the thought ever occur to you to VirtualDub might be wrong? I find it VERY interesting that you have concluded that VirtualDub is perfect and unable to make any mistakes. I second what bat999 says. And the fact that Gspot has a different answer than virtual dub is further proof that my first sentence might be right.

[Chug a Bug]

This is an interesting one. So I did a test encode myself and sure enough VirtualDub reports a warning about VBR but MediaInfo reports it as CBR.

So out of curiousity I demuxed the mp3 audio with VirtualDubMod, fed it into mp3DirectCut, then saved it without modifying anything, remuxed it back into the AVI with VirtualDubMod again and fed it into VirtualDub and, hey presto, no warnings this time, everythings hunky dory.

I figured that mp3DirectCut would output a "clean" version of the MP3 and fix any oddities that ffmpeg introduced into the headers etc, which proved to be the case, no transcoding necessary.

Personally though I wouldn't be using FFmpeg to transcode video tbh, there are better tools out there, its a jack of all trades, but master of none.

So, anyone care to explain why the latest FFmpeg _doesn't_ cure the incorrect VBR headers, as I understand the problem is??????!!

ffmpeg undergoes constant and rapid development which often introduce unintended errors. "Bleeding edge" they call it. Quite often I have to sift through lists of builds to find one that doesn't have a bug in the function I'm looking for.