ffmpeg flv2mpg co robię źle?

[Czeslavus]

Dot. UbuntuStudio 12.04 LTS GNOME xfce

Po wydaniu polecenia

Kod: Zaznacz cały

ubuntustudio@ubuntustudio-desktop:~/Pobrane$ ffmpeg -i Sachin.flv -r 25 -ab 56k -ar 22050 -b:v 1000k -s 1920x1080 -b:a 64k Sachin.mpg
............
............
[scale @ 0x8400c60] w:426 h:182 fmt:yuv420p -> w:1920 h:1080 fmt:yuv420p flags:0x4
[color=#BF0000][mpeg @ 0x840a3a0] VBV buffer size not set, muxing may fail[/color]
Output #0, mpeg, to 'Sachin.mpg':
  Metadata:
    starttime       : 0
    totalduration   : 305
    totaldatarate   : 343
    bytelength      : 13090527
    canseekontime   : true
    sourcedata      : B4A7DDA87HM1434692459520546
    purl            : 
    pmsg            : 
    encoder         : Lavf53.32.100
    Stream #0:0: Video: mpeg1video, yuv420p, 1920x1080, q=2-31, 1000 kb/s, 90k tbn, 25 tbc
    Stream #0:1: Audio: mp2, 22050 Hz, stereo, s16, 64 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (flv -> mpeg1video)
  Stream #0:1 -> #0:1 (mp3 -> mp2)
Press [q] to stop, [?] for help
frame=  217 fps= 10 q=24.8 Lsize=    1724kB time=00:00:08.64 bitrate=1634.6kbits/s dup=8 drop=0    
video:1644kB audio:68kB global headers:0kB muxing overhead 0.663439%
Received signal 2: terminating.
ubuntustudio@ubuntustudio-desktop:~/Pobrane$ 

No to wstawiam maxrate

Kod: Zaznacz cały

ffmpeg -i Sachin.flv -r 25 -ab 56k -ar 22050 -b:v 1000k -s 1920x1080 -b:a 64k -maxrate 736k Sachin.mpg
.........
.........
[buffer @ 0x927d620] w:426 h:182 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
[scale @ 0x91f7c60] w:426 h:182 fmt:yuv420p -> w:1920 h:1080 fmt:yuv420p flags:0x4
[mpeg1video @ 0x9201aa0][color=#FF0000] a vbv buffer size is needed, for encoding with a maximum bitrate[/color]
Output #0, mpeg, to 'Sachin.mpg':
  Metadata:
    starttime       : 0
    totalduration   : 305
    totaldatarate   : 343
    bytelength      : 13090527
    canseekontime   : true
    sourcedata      : B4A7DDA87HM1434692459520546
    purl            : 
    pmsg            : 
    Stream #0:0: Video: mpeg1video, yuv420p, 1920x1080, q=2-31, 1000 kb/s, 90k tbn, 25 tbc
    Stream #0:1: Audio: none, 22050 Hz, stereo, s16, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (flv -> mpeg1video)
  Stream #0:1 -> #0:1 (mp3 -> mp2)
[color=#FF0000]Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height[/color]
ubuntustudio@ubuntustudio-desktop:~/Pobrane$ 

Chodzi o te błędy zaznaczone na czerwono.(Niestety w Code nie ma kolorów) Jak ta składnia powinna wyglądać?