Может быть вот это?
-autosync <factor>
Gradually adjusts the A/V sync based on audio de-
lay measurements. Specifying -autosync 0, the
default, will cause frame timing to be based en-
tirely on audio delay measurements. Specifying
-autosync 1 will do the same, but will subtly
change the A/V correction algorithm. An uneven
video framerate in a movie which plays fine with
-nosound can often be helped by setting this to
an integer value greater than 1. The higher the
value, the closer the timing will be to -nosound.
Try -autosync 30 to smooth out problems with
sound drivers which do not implement a perfect
audio delay measurement. With this value, if
large A/V sync offsets occur, they will only take
about 1 or 2 seconds to settle out. This delay
in reaction time to sudden A/V offsets should be
the only side-effect of turning this option on,
for all sound drivers.
ну и, плюс, очевидное:
-audio-delay <any floating-point number>
Delays either audio or video by setting a delay
field in the header (default: 0.0). This does
not delay either stream while encoding, but the
player will see the delay field and compensate
accordingly. Positive values delay the audio,
and negative values delay the video. Note that
this is the exact opposite of the -delay option.
For example, if a video plays correctly with -de-
lay 0.2, you can fix the video with MEncoder by
using -audio-delay -0.2.
Currently, this option only works with the de-
fault muxer (-of avi). If you are using a dif-
ferent muxer, then you must use -delay instead.
В Сбт, 20/02/2010 в 21:27 +0000, Nicholas пишет:
> Перекодировал видео из mov в avi c параметром -oac pcm - все ок.
>
> Перекодировал такой же командой с единственным отличием -oac mp3lame:
>
> mencoder in.avi -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o out.avi
>
> Размер файла уменьшился с 2G до 0.8G, но звук стал отставать на 300ms.
>
> Как с этим можно бороться (в процессе кодирования) ?
>
>
> --
> Sincerely,
> Nicholas
>
>
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