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ffmpeg help - 16:9 HD -> 4:3 SD

 
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ffmpeg help - 16:9 HD -> 4:3 SD
zehd
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Posts: 5,119
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Joined: Feb 2006
#51
2007-09-23, 04:54 AM
pvruser Wrote:ok i'm annoying but i just played with a file that had dropped frames (bad reception duh)... well audio got out of sync so i added -async 15 like this:

ffmpeg.exe -y -i "sample.mpg" -b 4000k -ac 2 -ab 128k -r 29.97 -s 1184x500 -f svcd -cropleft 240 -cropright 240 -croptop 20 -aspect 4:3 -async 15 -threads 8 "test1.mpg"

i guess i cant think of anything else for now Big Grin

You are not annoying me. I was just fighting with sync problems... This is good stuff
Frank Z
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I used to ask 'why?' Now I just reinstall...
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Braklet
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#52
2007-09-25, 02:29 AM
Here's the ffmpeg command line I used to convert the Fox animation from 720p to a reasonable SD equivalent:

ffmpeg" -i %1 -cropleft 150 -cropright 150 -aspect 4:3 -b 4000000 -vcodec mpeg2video -s 720x480 -r 29.97 -acodec mp2 -ac 2 -ab 256000 SD_OUT.mpg

1080i requires different crop values, 220 IIRC.

In any case I wanted to archive the value I'm using for future reference.
zehd
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#53
2007-09-25, 02:49 AM
Braklet Wrote:Here's the ffmpeg command line I used to convert the Fox animation from 720p to a reasonable SD equivalent:

ffmpeg" -i %1 -cropleft 150 -cropright 150 -aspect 4:3 -b 4000000 -vcodec mpeg2video -s 720x480 -r 29.97 -acodec mp2 -ac 2 -ab 256000 SD_OUT.mpg

1080i requires different crop values, 220 IIRC.

In any case I wanted to archive the value I'm using for future reference.

I would say those numbers are in the ballpark of what I calculate
Frank Z
[COLOR="Gray"]
I used to ask 'why?' Now I just reinstall...
[SIZE="1"]______________________________________________
Author: ZTools: ZProcess, MVPServerChecker; UltraXMLTV Enhancer, Renamer, Manager; [/SIZE]
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dvasco
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#54
2007-10-10, 09:01 PM
Where do I put those settings to so GBPVR will automatically transcode the file after the recording finishes? I assume once that setting is in I can have the file set to transcode when I setup the recording.
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