[MEncoder-users] Converting m2ts from JVC GZ HD 10 to avi with mencoder

[tarnait]

Hi Grozdan,

first of all thanks for your answer. The original file has a framerate of 25 fps, I verified this with mediainfo, powerdirector, and some other program. I try to do a simple transcoding (because x264 playback is slow on my machine), nothing more. I don't care about the framerate, I only want the video in a well playable format, that's all.

Kind Regards, Tibor




________________________________
Von: Grozdan <microchip at telenet.be>
An: MEncoder usage discussions <mencoder-users at mplayerhq.hu>
Gesendet: Mittwoch, den 13. Mai 2009, 19:47:34 Uhr
Betreff: Re: [MEncoder-users] Converting m2ts from JVC GZ HD 10 to avi with mencoder

2009/5/13 tarnait <tarnai_t at yahoo.de>:
> Hi,
>
> I read all posts which could be related to this topic not only here,
> but on the mencoder mailing list and other sources, still I was not
> able to find a proper solution. My JVC camcorder produces m2ts files
> (which are x264 encoded). Ironically I didn't want to be an expert in
> this topic, but I read through all the material about encoding just to
> convert my files into a well playable format. Now I have produced the
> following script:
>
>
> Code:
>
>
> #!/bin/bash
>
> for i in `ls -al *.mts | awk '{ print $9 }'`
> do
>
> mencoder $i -ovc lavc -lavcopts threads=2:mbd=2:vcodec=mpeg4:vbitrate=12000:vpass=1:v4mv:trell:turbo \
> -fps 60000/1001 -vf filmdint,yadif=3,scale=1440:810,softskip -oac mp3lame -lameopts vbr=5 -o /dev/null
>
> mencoder $i -ovc lavc -lavcopts threads=2:mbd=2:vcodec=mpeg4:vbitrate=12000:vpass=2:v4mv:trell:turbo \
> -fps 60000/1001 -vf filmdint,yadif=3,scale=1440:810,softskip -oac mp3lame -lameopts vbr=5 -o $i.avi
>
> rm divx2pass.log
>
> done
>

First, what if the original frame rate of the file(s) and what are you
trying to achieve? You do realize that yadif-=3 is a bobber (frame
doubling filter)? So if you have 25 fps interlaced material and use
yadif=1 or yadif=3 it will make it 50 fps progressive. When using
yadif=1 or yadif=3 you MUST double both the input and output frame
rate, so it will look something like this for 25 fps interlaced
content:

-vf yadif=3 -fps 50 -ofps 50

>
>
> Still I got a lot of duplicate frame and/or Skipped frame messages
> which would not bother me, but the audio is out of sync, or the video
> is playing too fast (it drops about every 2,3,5,20,25) frame depending
> on the framerate. I tried fps={60,25,30, 60000/1001, 30000/1001,
> 24000/1001}, ofps={60,25,30, 60000/1001, 30000/1001, 24000/1001} every
> possible combination. And the duplicated/skipped frames where changing
> depending on the combo, so I assume it's the framerate. The closest
> problem I could found was here
>
> http://lists.mplayerhq.hu/pipermail/mencoder-users/2008-December/009634.html
>
>
> but the solution apparently didn't work for me. Does anyone have an idea what I could try?
> Oh yes, I did try to convert it with the software which they gave
> me to the camcorder - PowerDirector 6.50.310b - of course it did work,
> and the info about the file:
>
> Type: MPEG-4 AVC
> Bitrate: 12.09 Mbps
> Resolution: 1440x1080
> Framerate: 25.00
> SeitenverhältnisTyp: MPEG-4 AVC
> Originaldauer: 00:01:44:04
> Bitrate: 12.09 Mbps
> Auflösung: 1440x1080
> Bildrate: 25.00 Bilder pro Sekunde
> Ratio: 16:9
>
> the only problem is it runs under Windows
>
> Thanks for the answers, Kind Regards,
> trinux
>
>
>
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