[MPlayer-users] trying to reduce an mpg file's size ...

[Oliver Seitz]

Am 21.01.2009, 22:04 Uhr, schrieb Albretch Mueller <lbrtchx at gmail.com>:

> ~
>  I have a large (approx. 3.4Gb) mpeg2 video file that a friend produced
> ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~
> sh-3.1# ls -l origfl00.mpg
> -rwxr-xr-x 1 root root 3702380928 Jan 12 07:21 origfl00.mpg
> ~
> sh-3.1# ffmpeg -i origfl00.mpg
> FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
>   configuration:  --enable-gpl --enable-pp --enable-pthreads
> --enable-vorbis --enable-libogg --enable-a52 --enable-dts
> --enable-libgsm --enable-dc1394 --disable-debug --enable-shared
> --prefix=/usr
>   libavutil version: 0d.49.0.0
>   libavcodec version: 0d.51.11.0
>   libavformat version: 0d.50.5.0
>   built on Sep 25 2006 13:00:42, gcc: 4.1.2 20060901 (prerelease)
> (Debian 4.1.1-13)
> Input #0, mpegts, from 'origfl00.mpg':
>   Duration: 01:31:36.4, start: 57910.192056, bitrate: 5388 kb/s
>   Stream #0.0[0x191]: Video: mpeg2video, yuv420p, 720x576, 15000 kb/s,
> 25.00 fps(r)
>   Stream #0.1[0x192](ger): Audio: mp2, 48000 Hz, stereo, 192 kb/s
>   Stream #0.2[0x193](fra): Audio: mp2, 48000 Hz, stereo, 192 kb/s
> Must supply at least one output file
> ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~
>  which size I would like to reduce
> ~
>  I have never done that before and I don't seem to be able to find out
> how you do that on line. I did search mplayer messages, using , via:
> ~
>  http://archives.free.net.ph/
> ~
>  but I didn't get much out of it. I also posted a similar message at:
> rec.video.desktop "trying to reduce an mpg file's size ..."
> ~
>  How can you reduce this file's size?
> ~
>  I think the only options you have are, reducing:
> ~
>  1) the actual size of the media file, editing the file and leaving
> only the parts that are necessary
> ~
>  2) the size of the view window, so less pixels are included in each
> image (even though, due to compression, the size reduction won't
> certainly be linearly proportional)
> ~
>  3) the number of frames shown per second
> ~
>  4) its resolution, even if its quality will be decreased
> ~
>  After reducing the size of the file I will have to split it smaller,
> topical ones.
> ~
>  Is this possible or what is possible using mplayer?
> ~
>  Which other tools will I need?
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>  What would you suggest?
> ~
>  Thanks
>  lbrtchx
> _______________________________________________


I would suggest you read a bit about video compression, like here
http://en.wikipedia.org/wiki/Video_compression

As soon as you know what this means you can simply reduce the bitrate to  
1-2 MBit/s, by using advanced codecs like x264 even lower.

Greets,
Kiste