[MEncoder-users] Making an AVI which delcares itself to be interlaced

Fri Mar 21 23:44:55 CET 2008

On Friday 21 March 2008 23:39, Andy Civil wrote:
> Grozdan Nikolov (openSUSE Linux) wrote:
> > On Friday 21 March 2008 23:25, Andy Civil wrote:
> >> Grozdan Nikolov (openSUSE Linux) wrote:
> >>> On Friday 21 March 2008 22:54, Andy Civil wrote:
> >>>> Hi
> >>>>
> >>>> I'm trying to make an xvid avi file which is interlaced. Although the
> >>>> following command works quite well, the resulting AVI doesn't seem to
> >>>> be LABELLED as interlaced (although the content clearly is). What this
> >>>> means is, then when I use this kind of file in another program, I have
> >>>> to specify for each one, that it's interlaced (which is a bind, when I
> >>>> have fifty or so to do).
> >>>>
> >>>> If I use "gspot" on the file produced here, it doesn't light up with
> >>>> either TFF or BFF flags.
> >>>>
> >>>> Any options I'm missing that could make the interlaced flag be on?
> >>>
> >>> try...
> >>>
> >>> -vf scale=720:480,harddup,phase=t,tinterlace=2
> >>>
> >>> alternatively
> >>>
> >>> -vf scale=720:480,harddup,tinterlace=4
> >>>
> >>> since interlacing is added after scaling, there's no need to enable
> >>> interlace-aware software scaling
> >>>
> >>> also keep in mind that when interlacing, your frame rate will be
> >>> halved. So if you interlace a 60p content (59.94 fps) it will become
> >>> 30i (29.970 fps). You must use in this case the -ofps 30000/1001
> >>> options
> >>
> >> Thanks, but I think I do need interlace-aware scaling because my source
> >> is 1440 x 1080 (interlaced). In fact this was the feature that forced me
> >> out of FFmpeg into mencoder. I'm going from 30i to 30i. Nevertheless, I
> >> will google for your suggested options phase and tinterlace to see if
> >> they will help me.
> >
> > then why don't you just encode it as interlaced if the source is
> > interlaced to begin with? why do you need to interlace it again with some
> > filters? Just enable SWS interlace-aware mode and enable interlacing in
> > Xvid too and encode it as is if it's already interlaced like you said...
>
> Because I don't know how to do that. The string after "xvidencopts" is, I
> believe, control for the xvid encoder, which I guess I need, since I'm
> changing from AVCHD (sp?) to xvid. The "filters" are scale (to scale it),
> il=s (which was a futile attempt to control the interlacing, and which
> failed - I'll take it out), and harddup. I have no idea what harddup does,
> except that it has been recommended to people to keep audio synched.
>
> What would you suggest?

Since you're already dealing with interlaced content, you don't need interlace 
filters. Those are only useful if your content is progressive, which yours 
isn't. So in your case, just enable interlace-aware software scaler and turn 
on interlace-aware mode in Xvid with the interlacing option... then just 
encode... your options could look like this:

-vf scale=720:480:1,harddup -ovc xvid -xvidencopts 
bitrate=100000:interlacing:trellis:chroma_me:max_bframes=2  .......

>
> >>>> My command (copy/paste):
> >>>>
> >>>> I:\me\mencoder -oac mp3lame -lameopts preset=standard:fast -ovc xvid
> >>>> -xvidencopts
> >>>> trellis:quant_type=h263:vhq=2:me_quality=6:chroma_me:closed_gop:max_bf
> >>>>ra mes =2:bitrate=10000000:interlacing=1 -vf
> >>>> scale=720:480:1,il=s,harddup -ofps 30000/1001 -o
> >>>> "XVID\20080215145859_i1_vils.m2t.avi" "20080215145859.m2t"
> >>>>
> >>>> Here's the start of my output:
> >>>> E:\Sony\2008-02-15>I:\me\mencoder -oac mp3lame -lameopts
> >>>> preset=standard:fast -o vc xvid -xvidencopts
> >>>> trellis:quant_type=h263:vhq=2:me_quality=6:chroma_me:closed
> >>>> _gop:max_bframes=2:bitrate=10000000:interlacing=1 -vf
> >>>> scale=720:480:1,il=s,hardd up -ofps 30000/1001 -o
> >>>> "XVID\20080215145859_i1_vils.m2t.avi" "20080215145859.m2t "
> >>>> MEncoder Sherpya-SVN-r25962-4.2.3 (C) 2000-2008 MPlayer Team
> >>>> CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2,
> >>>> Stepping: 7) CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE:
> >>>> 1 SSE2: 1 Compiled with runtime CPU detection.
> >>>> success: format: 0  data: 0x0 - 0x19af5d4
> >>>> TS file format detected.
> >>>> VIDEO MPEG2(pid=2064) AUDIO MPA(pid=2068) NO SUBS (yet)!  PROGRAM N.
> >>>> 100 VIDEO:  MPEG2  1440x1080  (aspect 3)  29.970 fps  25000.0 kbps
> >>>> (3125.0 kbyte/s) [V] filefmt:29  fourcc:0x10000002  size:1440x1080 
> >>>> fps:29.97 ftime:=0.0334
> >>>> ======================================================================
> >>>>== == Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
> >>>> AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
> >>>> Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
> >>>> ======================================================================
> >>>>== == xvid: using library version 1.1.3 (build xvid-1.1.3)
> >>>> Opening video filter: [expand osd=1]
> >>>> Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
> >>>> Opening video filter: [harddup]
> >>>> Opening video filter: [il=s]
> >>>> Opening video filter: [scale w=720 h=480 interlaced=1]
> >>>> ======================================================================
> >>>>== == Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough VDec:
> >>>> vo config request - 1440 x 1080 (preferred colorspace: Mpeg PES) The
> >>>> selected video_out device is incompatible with this codec. Try
> >>>> appending the scale filter to your filter list,
> >>>> e.g. -vf spp,scale instead of -vf spp.
> >>>> VDecoder init failed :(
> >>>> Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder
> >>>> libmpeg2-v0.4.0b Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1
> >>>> or 2 (libmpeg2))
> >>>> ======================================================================
> >>>>== == MP3 audio selected.
> >>>> VDec: vo config request - 1440 x 1080 (preferred colorspace: Planar
> >>>> YV12) VDec: using Planar YV12 as output csp (no 0)
> >>>> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> >>>> SwScaler: reducing / aligning filtersize 9 -> 8
> >>>> SwScaler: reducing / aligning filtersize 9 -> 8
> >>>> SwScaler: reducing / aligning filtersize 10 -> 9
> >>>>
> >>>> Thks for any hints...
> >>
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