Comments on Komeil Bahmanpour: FFmpeg SVN-r17988-Komeil for Windows

Hi This is fine.. But i just need to work with dsh...

2011-08-18T22:03:35.640-07:00

Hi
This is fine..
But i just need to work with dshow.
Would you provide solution for enabling dshow format in ffmpeg?
Thanks in advance...

Regards,
Sreerag
sreemnpy@gmail.com

Thanks Komail, great work!

2011-07-19T05:12:42.962-07:00

Thanks Komail, great work!

thanks for your usefull work !

2010-09-15T14:17:35.711-07:00

thanks for your usefull work !

parece interesante

2010-06-18T01:15:28.016-07:00

parece interesante

thank you very much for this. Finally something sl...

2010-06-17T21:40:28.417-07:00

thank you very much for this.
Finally something slim to convert xvid/mp3 .avi to h264/aac .mp4 in one go. only other option was to use Adobe Media Encoder (horrible)

To convert 3GP to FLV with audio: ffmpeg -i input...

2010-05-08T09:25:48.375-07:00

To convert 3GP to FLV with audio:

ffmpeg -i input.3gp -f flv -vcodec flv -r 15 -b 300k -aspect 176:144 -s 176x144 -acodec libmp3lame -ar 11025 -ab 64k -ac 1 -y output.flv

I want to convert 3gp to flv with audio enable. pl...

2010-05-03T05:31:19.577-07:00

I want to convert 3gp to flv with audio enable. please tell me the correct command

Hi Inanda, You don't have to download any cod...

2010-03-06T17:48:20.281-08:00

Hi Inanda,

You don't have to download any codecs, FFmpeg is a stand-alone executable. All you need is an AMR-enabled FFmpeg compilation, one like mine.

First, "-acodec amr_nb" is worng, it should be "-acodec libamr_nb".

Then, For AMR-NB, only an 8000 sample rate and one of the following bitrates are valid:
4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 10.2k or 12.2k

To make an early-Nokia-compatible 3GP, use AMR-NB 8000/12.2k: "-ac 1 -ar 8000 -ab 12.2k"

Read more here.

And FYI, for the AMR-WB (Adaptive Multi-Rate Wide-Band), only a 16000 sample rate and one of the following bitrates are valid:
6.6k, 8.85k, 12.65k, 14.25k, 15.85k, 18.25k, 19.85k, 23.05k, or 23.85k

Hi Komeil, Can you help me? I need to know how c...

2010-03-06T17:33:27.395-08:00

Hi Komeil,

Can you help me?

I need to know how convert the format of video using FFMPEG (Windows). I did the download from your site and I don't know how can I use the codecs.
I downloaded the AMR_NB codec, for example, for convert the video to 3GP format, but where I need to put these files?
I'm using the command "ffmpeg -y -i entrada.avi -s qcif -vcodec h263 -acodec amr_nb -ac 1 -ar 8000 -r 15 -ab 32 saida.3gp", and getting the message "unknown encoder amr_nb".
Can you explain how to use the codecs?

Hi Komeil, many thanks for your help and i wrote s...

2010-01-17T01:35:38.910-08:00

Hi Komeil,
many thanks for your help and i wrote some instructions in turkish language. it may help people. http://cid-c07817cd4d2dd44b.spaces.live.com/blog/cns!C07817CD4D2DD44B!122.entry

thanks again,
burak

Hi Komeil, I've managed to compile ffmpeg with...

2010-01-16T22:21:39.177-08:00

Hi Komeil,
I've managed to compile ffmpeg with some instructions from the given links and with more extra research. I also attached this ffmpeg to FOBS JMF player. If someone needs detailed instructions just visit http://cid-2525acf96f6962bf.spaces.live.com/blog/cns!2525ACF96F6962BF!141.entry

Awesome, Komeil. Thanks. That did it. I got SVN-r2...

2010-01-15T02:52:46.137-08:00

Awesome, Komeil. Thanks. That did it. I got SVN-r20900 and that was able to read and decode a .QCP file.

Kevin, One delicate thing once you use "ffmp...

2010-01-13T00:15:40.924-08:00

Kevin,

One delicate thing once you use "ffmpeg -formats" is the results contain two tables, with the first being entitled "file formats" and the second "codecs". QCELP (the codec) is listed under "codecs", but QCP (the file format) is NOT listed under "file formats". So the conclusion is just like what you've stated, it can only decode (the "D A" in "D A qcelp QCELP / PureVoice" means decode audio stream) once it's used as the "audio stream" of an MP4, but the QCP as an audio file format is not supported.

There's never been a QCP "demuxer" module (libavformat/qcp.c) in FFmpeg implementations before SVN-r18890 of May 21, 2009. This "qcp.c" file was added to the FFmpeg "libavformat" by "Kenan Gillet".

Looking into the source of this newly added "qcp.c" file, you can find a C++ comment:

// "QLCMfmt " + chunk-size + major-version + minor-version

Pay attention to the "QLCMfmt", now, if you open one of the QCP files you've referenced in NOTEPAD.EXE, after the "RIFF", the "QLCMfmt" is evident. That's where "qcp.c" grinds the QCP header.

And look for "- QCP demuxer" here in the FFmpeg Changelog, it's just recently added.

So maybe if you make a version newer than SVN-r18890, it might be able to decode QCP files. To ensure your compilation is able to demux/decode QCELP streams containing within QCP files, use "ffmpeg -formats", and check to see if QCP is listed under "file formats".

Can FFmpeg convert a QCELP (Qualcomm .QCP PureVoic...

2010-01-12T23:37:20.949-08:00

Can FFmpeg convert a QCELP (Qualcomm .QCP PureVoice) audio file from a cell phone to standard WAV format? I've tried:

ffmpeg -i warp.qcp warp.wav

and it just fails with "warp.qcp: Unknown format"

You can download sample QCP files from: http://www.mplayerhq.hu/MPlayer/samples/A-codecs/suite/QCP/

I have tried several precompiled versions of FFmpeg found on the web and I have also successfully downloaded the latest source code and compiled it myself. When I do "ffmpeg -formats", in the list under codecs is "D A qcelp QCELP / PureVoice".

I can't find any explicit examples of using FFmpeg to convert QCELP. Really the only other stuff I can find talks about how, back in 2006, QCELP support was "patched" in using the "Reference Implementation (RI)", but then with the release of FFmpeg 0.5, it is now officially supported and has it's own implementation (I have looked at those source code files). Also I have found some talk that QCELP is used as the audio format for some QuickTime mp4 movies. It appears that people have successfully transcoded these mp4 files to other formats. It would seem weird that the FFmpeg QCELP decoder is supported in that sense but not able to convert an audio file directly.

Anyone out there, Komeil...:-), that could help I'd appreciate it.

Thanks,
Kevin

Many thanks Komeil

2010-01-12T03:27:31.237-08:00

Many thanks Komeil

Hi Kabil, This is the best wiki about building FFm...

2010-01-12T00:35:22.725-08:00

Hi Kabil,
This is the best wiki about building FFmpeg with external libraries: http://ffmpeg.arrozcru.org/wiki/index.php?title=Using_External_Libraries
I'm going to modify this post to include the libraries. Check back in an hour.

Hi Komeil, Because I am newbie on compiling ffmpeg...

2010-01-12T00:23:21.856-08:00

Hi Komeil,
Because I am newbie on compiling ffmpeg, can you please post ffmpeg source tree with external libraries?

Dear Komeil, >> To improve your first comma...

2009-09-21T18:08:24.420-07:00

Dear Komeil,

>> To improve your first command (MP3 to AMR conversion) and make it flawless, add "-f amr" to force output format to AMR ...

did not play any sound on 4 different mm players including mplayer.

But played well when replacing -f amr to -f 3gp

Khaled
http://www.hellway.com

Dear Younus, To improve your first command (MP3 t...

2009-09-08T05:50:44.474-07:00

Dear Younus,

To improve your first command (MP3 to AMR conversion) and make it flawless, add "-f amr" to force output format to AMR, and add "-ac 1" to specify monaural (mono-channel) audio. Yours fails if the input MP3 is stereo!

To improve the second command (FLV to 3GP), add "-f 3gp" to force format to 3GP, and increase "-b 32k" up to 339k for a better mobile playback quality.

To know more about 3GP conversion, read my new post.

great, I have been breaking my head to get amr to...

2009-09-05T12:23:31.459-07:00

great,

I have been breaking my head to get amr to work on ffmpeg for windows.

finally it works on windows ..thanks to komeil

I used the command as below

ffmpeg -i tawwab.mp3 -acodec libamr_nb -ar 8000 -ab 12.2k tawwab.amr

and it went fine and created a amr audio file.

and then tried this command below

ffmpeg -i test.flv -vcodec h263 -r 15 -b 32k -s 176x144 -acodec libamr_nb -ar 8000 -ac 1 -ab 12.2k tawwab.3gp

worked as well...

thanks to komeil...amr and 3gp worked.