[ubuntu-in] FFMPEG Video to Mp4, Mp4 to video/audio problem

[Mallikarjun(ಮಲ್ಲಿಕಾರ್ಜುನ್)]

On Tue, Nov 10, 2009 at 8:37 AM, Mehul Ved <mehul.n.ved at gmail.com> wrote:

> 2009/11/10 Mallikarjun <mallik.v.arjun at gmail.com>:
> > On Tue, Nov 10, 2009 at 12:21 AM, Mehul Ved <mehul.n.ved at gmail.com>
> wrote:
> > This works, but how do you improve the quality of video & how to convert
> mp4
> > to other format.
> > Also if you could explain the parameters, i will be thankful
> >
> >>
> >> Remember to put -acodec copy otherwise ffmpeg uses aac which will not
> >> give you any sound. You can play around with size(-s), frame rate(-r),
> >> bitrate(-b), audio rate(-ar) and audio bitrate(-ab).
>
> Parameters are explained right below your reply.
>
> To get a better qualilty you can look at the following:
> -s vga(640x480) or svga(800x600)
> -ab 128 to 320 depending on the audio bitrate of original video, the
> audio quality you want for the output file and the size consideration
> for the output file.
> Of course, the original video should be of good quality else it won't
> be of much use.
> You can get much more information on the options on this page[1]
>
> To convert mp4 to other format you can look at -vcodec[2] option to
> specify the video codec and -acodec[3] to specify the audio codec.
> Also look at the output of ffmpeg -formats
>
> Thats quiet informative, thanks a lot

> 1. http://ffmpeg.org/ffmpeg-doc.html
> 2. http://ffmpeg.org/general.html#SEC6
> 3. http://ffmpeg.org/general.html#SEC7
>
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