How to convert avi to 3gp?

yuchankit · 12-08-2008, 10:40 AM

How to convert avi video files to 3gp format?

Thank you.

zux · 12-08-2008, 01:30 PM

this should do it:

Code:

ffmpeg -i inputfile.avi -s qcif -vcodec h263 -acodec aac -ac 1 -ar 8000 -r 25 -ab 32 -y outputfile.3gp

found it here:
http://twinturbo.org/linux/howto-con...-using-ffmpeg/

EDIT:
you should have all the codecs installed, I have not tried this, so don't know if slackware have them by default

EDIT2:
seems that slackware doesn't have ffmpeg (or is it just me)
you can get it from slackbuilds.org

vdemuth · 12-08-2008, 02:06 PM

http://www.miksoft.net/products/mmc-lin.tar.gz

For a quick and simple to use gui

adriv · 12-08-2008, 02:44 PM

Even easier (well, I think so), is to use on-line application Zamzar.
No installation, no hassle, good quality.

yuchankit · 12-09-2008, 06:23 AM

I don't have the aac encoder.

How to add encoders to ffmpeg,other than recompile it?

Alien Bob · 12-09-2008, 10:21 AM

Quote:

ffmpeg -i inputfile.avi -s qcif -vcodec h263 -acodec aac -ac 1 -ar 8000 -r 25 -ab 32 -y outputfile.3gp

This does not create a real 3GP file. For that you would need to encode the audio in AMR.
This would be the correct command to create a 3GP file:

Code:

ffmpeg -i inputfile.avi -s qcif -vcodec h263 -acodec libamr_nb -ac 1 -ar 8000 -r 25 -ab 12200 -y outputfile.3gp

Also, to create a video with AAC sound, passing "-acodec aac" to ffmpeg will produce an error. When AAC encoding support is added through libfaac, then the correct argument would be "-acodec libfaac".

Get my ffmpeg Slackware package which includes AAC/MP3/AMR encoding support here:
http://slackware.org.uk
I just uploaded this package plus SlackBuild and verified that the above instructions work. No further packages needed!

Eric

yuchankit · 12-09-2008, 11:02 AM

How to actually add more encoder to ffmpeg,other than recompile it?

If let say I need certain type of encoder,can I just install it as slackware package?

Alien Bob · 12-09-2008, 11:23 AM

Quote:

Originally Posted by yuchankit

How to actually add more encoder to ffmpeg,other than recompile it?

If let say I need certain type of encoder,can I just install it as slackware package?

No. You need to recompile ffmpeg.
Tell me, what encoder you think you miss from the package I just linked to..

Eric

yuchankit · 12-09-2008, 07:37 PM

I actually have ffmpeg package already.

So,do I need to uninstall your ffmpeg,and install your ffmpeg instead?

Alien Bob · 12-10-2008, 08:23 AM

I do not know what ffmpeg package you have installed, but yes, I would advise to remove that one and install mine instead ;-)

Eric

yuchankit · 12-10-2008, 10:02 AM

Can you recreate the package for slackware 12.0?I think your package is for slackware 12.1

Alien Bob · 12-10-2008, 05:44 PM

You can build it yourself for Slackware 12.0 if you download all of the "build" directory and then run the ffmpeg.SlackBuild script.

Code:

lftp -c "open http://www.slackware.com/~alien/slackbuilds/ffmpeg/; mirror build"

Then do

Code:

cd build
sh ffmpeg.SlackBuild

You will find that the package is created in /tmp .

You will also need to install YASM or the compilation will fail.

Eric

yuchankit · 12-11-2008, 06:44 AM

Thank you.The commands and packages you provided is working.

But I have one more question to ask;If I want to add more encoder to ffmpeg,how I'm going to recompile it?What prefix must be added?

Alien Bob · 12-11-2008, 06:53 AM

Quote:

Originally Posted by yuchankit

But I have one more question to ask;If I want to add more encoder to ffmpeg,how I'm going to recompile it?What prefix must be added?

And my earlier question was, can you find a codec you think should still be added to that ffmpeg package?

Eric

yuchankit · 12-11-2008, 06:59 AM

Do you mean that the package you provide includes all the encoders?

Let's say I need an encoder that converts .flv files to 3gp files,how I'm going to compile ffmpeg to include the mentioned encoder?Thank you.