Re: ffmpeg command line for compressing DV to MPEG1

[Martin Langhoff <martin.langhoff@gmail.com>]

Thanks! I am going to be using this to trigger a compression
_immediately_ after I've captured and checked the capture, at least on
the small room. I'll put it in a mini-shell script to avoid typos and
make sure I keep the filename but replace the extension correctly.


martin

On 7/10/05, Herman Robak <herman@skolelinux.no> wrote:
> ffmpeg -i dv-video.avi -s 384x288 -vcodec mpeg1video -b 300 -g 48 -ac 1 -ab 64 -ar 32000 364kbs-video.mpeg
> 
> -s : Scale to this size (scale to exactly half height, and get deinterlaceing for free)
> -vcodec : Video codec.  mpeg1video implies mp2 sound.
> -b : Video bitrate.  300 kb/s is enough where there is little movement.
> -g : Distance between keyframes.  With little movement, fewer keyframes are good.
> -ac : Number of channels.  We are only recording one channel.
> -ab : Audio bitrate in kb/s.  64 kbits is OK for one-channel speech.
> -ar : The audio sample rate.  Lower sample rate reduces compression artifacts.
> 
> --
> Herman Robak
> 
> 
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