Techie Zone

This is by far the best guide for ffmpeg on the web.

Thank you very much!

hi,
How to convert a file in two different audio bit rates (eg 64 kb and 128 kb)in one command. What is the -map_meta_data can you explain it in details.

Thanks,
Pravin k.

hi,
I think we can convert the in multiple bit rate in one command.That is workable but I did not understand the -map 0:0 -map 0:0 part in the
ffmpeg -i /tmp/a.wav -ab 64k /tmp/a.mp2 -ab 128k /tmp/b.mp2 -map 0:0 -map 0:0
can u explain it …

-pravin

Hi, i am trying to convert some mp4 files captured from a mobile phone. It works fine with -an command (no sound) but i need sound too.
Thank You

sorry it was my fault. the audio bit rate for that file was not included in ffmpeg default audio rates; so a command like
ffmpeg -i 11122007012.mp4 -ar 11025 test.flv
worked very nice.
Thank you for this great tutorial

Hi,
Can I convert a WMV file to MPEG4 format file with the audio as it was. I have used the following command -
>ffmpeg -i Bear.wmv -b 600 -s 320×240 -vcodec mpeg4 -acodec copy -f mp4 Bear.mp4

But unfortunately the output is not good. Audio is absent and the video quality is very poor. Could you please suggest me what is wrong in this command.

Regards
litak

can you explain how to convert multi wav file to mp3

hi,

for Converting 3GP to FLV using FFMPEG as per your above example following command will convert video but without sound.
ffmpeg -i movie1.3gp -sameq -an movie1.flv

But i want to convert video with sound. Sound should be remain as it is. Can anybody please give me proper command to convert 3gp to flv.

Thanks in advance.

Hi,

I am trying to extract meta data from .flv, .wmv and .rm file.

What I need to extract from these files is:

1. Width
2. Height
3. Bit rate
4. FileSize
5. Duration
6. MimeType

Is there any way I can get this using Java + FFmpeg libs? If yes then please share from where to start?

Any help or comments on this would highly appreciated.

Hi there

Sorry I am sooo confused its frigtning … trying to do all sort of demuxing and muxing for my archos 5.

What would be of untold help, is if someone can give me the basic command to convert ac3 to aac.

many many thanks in advance

@Robert:
s/b:
ffmpeg -i input.ac3 -acodec aac output.aac

Great tutorial. One thing that should be mentioned is that the order of the parameters is important. Parameters are applied sequentially. If you put the “-acodec” parameter before the “-i” parameter, ffmpeg will apply the codec to your input file, and your conversion won’t work.

hi thanks for ur tuts can u help me how to get output file in VBR format for mp3 files i m using this command ffmpeg -ab 160k -i source.mp3 destination.mp3 but it converts the source.mp3 to 160kbps in CBR not in VBR. Kindly tell me the option to do so… plz Thank you.

I need to get the video in the same quality of input file after video conversion and the size of the converted file near or same to the input file.
Can anyone help me please?, I lost more time in this.

This is the code I used for conversion
exec(“../ffmpeg -i 1.mov -sameq -f flv -vcodec flv -b 400kb -s 614×400 -qmin 1 -qmax 31 -acodec libmp3lame -ar 22050 -ac 1 1.flv”);

After conversion quality of the video is ok, but the size of the flv file (1.flv) converted is large in size.
If I remove the -sameq from the above syntax , problem of huge size of converted flv file
(1.flv) will solve , then the quality of the video is poor.

hi
i want to convert all audio file to mp3 file.that is working……but problem is that mp3 file not support to flash player. that file play on vlc and media player giving error..The file you are attempting to play has an extension (.mp3) that does not match the file format. Playing the file may result in unexpected behavior.

plz give me any suge…

IS it ffmpeg useful to transcode other videos into WMV format ?

Hi Hitesh,
I need one help from you. I have a ffmpeg server hosting. When I am trying to convert my mp4/3gp file into flv file, the script create a .flv file but its a 0(Zero) byte file. I have checked the folder permission and all other possibilities, but not recognized the actual problem. I have used the simplest command
ffmpeg -i src/movie1.mp4 dest/movie1.flv

Can you plz help?

I have converted any video format to 3gp file format using ffmpeg on one server. But on another server it not works.

Following is my script:

exec(“ffmpeg -i test.flv -sameq -acodec libmp3lame -ar 22050 -ab 96000
-deinterlace -nr 500 -s 320×240 -aspect 4:3 -r 20 -g 500 -me_range 20
-b 270k -deinterlace -f flv -y test.3gp “);
Can anyone tell me what is wrong in script?

Following is my ffmpeg setting:

root@ninja [~]# ffmpeg -formats ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: –enable-mp3lame –enable-libogg –enable-gpl –disable-mmx –enable-shared built on Jun 17 2009 10:51:43, gcc: 4.1.2 20080704 (Red Hat 4.1.2-44)

has anyone got the solution on

sandy

hi,

for Converting 3GP to FLV using FFMPEG as per your above example following command will convert video but without sound.
ffmpeg -i movie1.3gp -sameq -an movie1.flv

But i want to convert video with sound. Sound should be remain as it is. Can anybody please give me proper command to convert 3gp to flv.

Thanks in advance.

Hi hitesh,

Is it possible to convert an swf to avi or flv or mpg using ffmpeg…in linux…???
if so pls give some info on this for me..!!!

thanks in advance,
Venkat.

kindly help me with the command to convert flv video to mp3

Hi hitesh
I am asking about swf to avi or flv not video conversion
Please gimme a procedure to convert from linux terminal

Thanks in advance
Venkat

hi,
-map_meta_data output file:input file
is not working.
when i converted any media file into flv.orignal file have metadata.in metadata duration is mention correct but in flv file durtion is mention 00:00:00. please send me solution how can i set duration if flv file.
thanks
Rana Muhammad Saleem

Hi

I am using ffmpeg for play audio/video in Mobile.

I converted from .WMV to .FLV or .3GP(get 0 size), or in MP4 but do not able to play in mobile when same file play properly in desktop Real Player.

I tried Command in following way:
ffmpeg -y -i c:\movie1.wmv -sameq -an movie1.mp4

Where is the problem you know that?

Thanks in Advance
Taruna

Hi Hitesh,
I am using ffmpeg in my java code. I am able to converting a wave file into mp3 file. But problem is when i am giving my inputfile and output as static it is giving me output ok. But i am giving inputfile name as a variable from my code and output file name also a variable from my code it is not working. Can you please helpme out.

my code is like this.

String cmd[]={“cmd.exe”, “/C”, “c:\\ffmpeg -ab 48k -ar 44100 -i c:\\capture.wav -y c:\\capture.mp3 “}; — works fine if I am giving like this means

String cmd[]={“cmd.exe”, “/C”, “c:\\ffmpeg -ab 48k -ar 44100 -i c:\\capture.wav -y c:\\’”+filename+”‘ “}; — not working if I am giving like this.

Hi Hitesh,

Thank you very much… It resolved my problem.

Thanks & Regards
Srikanth

Hi Hitesh…
I am recording voice using jmf as a web application. When run from client machine it is saves record on the server but i am not able to run more than one client at a time. Your help would be appreciated.

Thanks & Regards
Sri

any ideas on how to convert mp3 to flv???

i m converting the wav file to mp3 it is not working mp3 is not working
Please replay me

Thanks

Hi, hope you can help me out.
I got lots of queries
to begain with, is there any size limitation on source file to be converted to flv?

avinash :Hi,New Year’s best wishes to You and All.
and hope you can help me out.I got lots of queries to begain with, is there any size limitation on source file to be converted to flv?

ffmpeg -i -acodec libmp3lame -ab 160kb -ac 2 -ar 44100

The Above command executed and 0 byte mp3 file is created always. Can anybody tell me what might be the reason?

Thanks in advance.

Hi Hitesh,
I am trying to convert wav to mp3 using java, i am able to do conversion but my problem is it is getting struck while running the program if i click on ctrl+c on my code it is getting the correct size, otherwise it is getting struck at somepoint.

@Hitesh Agrawal
yes.. Hitesh.. I am using Runtime.getRuntime().exec call to ffmpeg…

Thanks

hi hitesh,
Yes, I am using Runtime.getRuntime().exec call only…,

Thanks

Hi Friend,

I have to convert AAC file to Mp3 in my project for detecting BPM.

I installed FFMPEG and i added all the library and i am not getting any compiler error but it crashes when i run the project.

I am getting following error,

[Session started at 2010-02-23 19:22:13 +0530.]
2010-02-23 19:22:14.641 New Decode[7170:10b] *** _NSAutoreleaseNoPool(): Object 0x20a2d0 of class NSCFData autoreleased with no pool in place – just leaking
Stack: (0x967a8f4f 0x966b5432 0x966c9b25 0x966c9701 0x2eb2 0x28de)
2010-02-23 19:22:14.649 New Decode[7170:10b] *** _NSAutoreleaseNoPool(): Object 0x20bcf0 of class NSCFData autoreleased with no pool in place – just leaking
Stack: (0x967a8f4f 0x966b5432 0x966c9b25 0x966c9701 0x2ed5 0x28de)
Audio decoding
[aac @ 0x1802000]channel element 1.0 is not allocated
Error while decoding

The Debugger has exited with status 1.The Debugger has exited with status 1.

Does any one have idea about it?.

Regards,
CocoaDev.

I want to convert flv files mp4 format.
Can you please tell me the command for this and audio codecs required for this?

the -ab parameter is in bytes, so if you put 256, its wrong, then you need to multiply for 1024, and the result 262144 put in that parameter.

Hi,

I have read the article.. really helpful.. Interested readers/coders also suggested to view this URL..http://www.apachefriends.org/f/viewtopic.php?f=16&t=32688 .. This is really a great help for me when i was trying to integrate this in one of my websites.

Hi,

We converted files and were using JW Player unlicensed copy to play the files then I bought license copy but the same files which use to play with unlicensed copy of JW player is not playing in license version. we convert video files through ffmpeg so we are using the same commands to convert files. I contacted to jw player and said it might be because our files are missing metadata and we need to inject metadata through ffmpeg!

question is what kind of metadata our file might be missing? if that is the fact then why it was running under unlicensed version of jw player? so lets say now we want to try to use metadata. can anyone pls tell me how exactly the metadata can be injected while converting files? what can happen if the file is really missing metadata? (right now when you click on player it keeps shows that round thing! videos are not playing)

@Daniel
I am unable to convert a .mp4 to a .flv file by using this argument – “ffmpeg.exe -i filename.mp4″ -ar 22050 filename.flv”. I get an Unhandled exception. I have tried various values for the -ar parameter like 11025, 22050, and 44100. Any help is appreciated. Thanks!

Dears,

How to convert mp3 to midi (midi polyphonic) with FFmpeg or other technology???

plz help…
waiting for your kind reply…

regards,
samir

hi,
it is very very usefull document.
Thank u very much…
mcc