[MEncoder-users] Audio/Video desync during conversion by mencoder

[Andrey Voropaev]

Hello!

Sorry, I'm complete newbie in the area of video, all I wanted is to
make video file small enough to play on my PDA.

Original size was 700x404 and I wanted to reduce it to 400x230. First
I tried to use command

mencoder -o converted.avi -oac copy -ovc copy -vf scale=400:-2 original.mkv

It failed with the error

Audio format 0x73627276 is incompatible with '-oac copy', please try
'-oac pcm' instead or use '-fafmttag' to override it.

Then I've tried

mencoder -o converted.avi -oac lavc -ovc lavc -vf scale=400:-2 original.mkv

During conversion there was lots of skipped frames. The conversion
ended with the message

Too many audio packets in the buffer: (4101 in 932920 bytes).
Maybe you are playing a non-interleaved stream/file or the codec failed?
For AVI files, try to force non-interleaved mode with the -ni option.

In the resulting file the audio was well behind video. Option -noskip
didn't help. What would be the proper way to convert the file?

When playing original file mplayer reports the following

[mkv] Track ID 1: video (V_MPEG4/ISO/AVC) "Spice and Wolf: Wolf and
Distant Past", -vid 0
[mkv] Track ID 2: audio (A_VORBIS) "2ch Vorbis", -aid 0, -alang jpn
[mkv] Track ID 3: subtitles (S_TEXT/ASS) "Styled Subtitles", -sid 0, -slang eng
[mkv] Will play video track 1.
Matroska file format detected.
VIDEO:  [avc1]  704x400  24bpp  23.976 fps    0.0 kbps ( 0.0 kbyte/s)
[ass] auto-open
[ass] Init
[ass] Updating font cache.
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->192000)
Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis decoder)
==========================================================================
AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 704 x 400 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.76:1 - prescaling to correct movie aspect.
VO: [xv] 704x400 => 704x400 Planar YV12

Would appreciate any help!