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

[tarnait]

Hi,

the video is (according to mediainfo interlaced). I need to provide fps and ofps, because I got a lot of duplicate frame/skipped frame messages. The fps=50 ,ofps=25 seems to work. My current script looks like:

#!/bin/bash

for i in `ls -al *.mts | awk '{ print $9 }'`
do

mencoder $i -oac mp3lame -lameopts vbr=5 -o /dev/null -ovc lavc -lavcopts threads=2:mbd=2:vcodec=mpeg4:vbitrate=12000:vpass=1:v4mv:trell:turbo:aspect=16/9 \
-fps 100 -ofps 50 -vf pullup,yadif=3,scale=1440:1080,softskip

mencoder $i -oac mp3lame -lameopts vbr=5 -o $i.avi -ovc lavc -lavcopts threads=2:mbd=2:vcodec=mpeg4:vbitrate=12000:vpass=2:v4mv:trell:turbo:aspect=16/9 \
-fps 100 -ofps 50 -vf pullup,yadif=3,scale=1440:1080,softskip

rm divx2pass.log

done


double values because of the bobbing  stuff you've mentioned. This seems to finally give me only a couple duplicate frames, a/v desync is not noticeable. 

I have to really thank you all for supporting me, I hope I can pay back (with other knowledge) someday.

Kind Regards, Tibor




________________________________
Von: Grozdan <microchip at telenet.be>
An: MEncoder usage discussions <mencoder-users at mplayerhq.hu>
Gesendet: Mittwoch, den 13. Mai 2009, 23:43:24 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 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

well, if so, why are you changing framerates by forcing -fps
60000/1001 ? if the file is interlaced and you want to keep the 25
fps, just deinterlace it with either yadif or one of the pp=
deinterlacers,

-vf yadif=0,softskip,harddup

or

-vf pp=lb,softskip,harddup

also, in your original script, you use filmdint which is a inverse
telecine filter (though it sometimes also works as deinterlacer). You
shouldn't do that if your file is not telecined

a tip on interlaced material: 25 fps interlaced has 50 fields/s and
like belcampo said, fields != frames

>
>
>
>
> ________________________________
> 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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>> MEncoder-users mailing list
>> MEncoder-users at mplayerhq.hu
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>>
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