[MEncoder-users] Audio/Video Sync Issue

Grozdan neutrino8 at gmail.com
Fri Jun 1 18:30:41 CEST 2012


On Fri, Jun 1, 2012 at 6:25 PM, Linux <linux at thehoytfamily.com> wrote:
> Mencoder was working for me under Fedora 11 (64-bit) but I upgraded to
> Fedora 16 (64-bit) and now the audio is way off of the video. By more than
> 10 seconds. I recompiled from SVN and still the same problem. What are
> things I can try?
>
> The command I am using is:
>
> /usr/local/bin/mencoder dvd://2 -nosub -aid 128 -mc 0 -ovc lavc -lavcopts
> vcodec=mpeg:v4mv:mbd=2:trell:vbitrate=900:vpass=1:turbo=1 -oac copy -o
> test.avi

have you tried without -mc 0 ?

-mc 0 completely disables MEncoder's A/V sync algorithm and in more
cases than not can cause severe sync issues


>
> The version is:
>
> MEncoder SVN-r34980-4.6.3 (C) 2000-2012 MPlayer Team
>
> audio stream: 0 format: ac3 (5.1) language: en aid: 128.
> number of audio channels on disk: 1.
> subtitle ( sid ): 0 language: en
> subtitle ( sid ): 1 language: es
> subtitle ( sid ): 2 language: fr
> number of subtitles on disk: 3
>
> success: format: 2  data: 0x0 - 0x4fb76000
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x480  (aspect 3)  29.970 fps  9800.0 kbps (1225.0 kbyte/s)
> [V] filefmt:2  fourcc:0x10000002  size:720x480  fps:29.970  ftime:=0.0334
> ==========================================================================
> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> libavcodec version 54.23.100 (internal)
> AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000)
> Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
> ==========================================================================
> Opening video filter: [expand osd=1]
> Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
> ==========================================================================
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
> ==========================================================================
> audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/s=56000
> sample-1)
> [VD_FFMPEG] Trying pixfmt=0.
> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> videocodec: libavcodec (720x480 fourcc=34504d46 [FMP4])
> [VE_LAVC] High quality encoding selected (non-realtime)!
> [mpeg2video @ 0xe10560]concealing 1035 DC, 1035 AC, 1035 MV errors
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