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Old 6th Jan 2008, 11:58 am
jp jp is offline
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Keen on MPx players
 
Join Date: Sep 2006
Posts: 77
Default Re: Free Open-Source converter for RockChip MPEG4 (XVID) pla

mjjgirlie: Your player is likely OK. Desynching is a common complaint with XVid irrespective of the conversion program used. I've used various ones but my favourite is viDrop which you can find above or in the downloads section on this site. I'm not sure that it's actually the XVid codec because the quality and parameters of the source file seems to affect this.

I've converted some files with no desynching and others with it occuring. One thing that may minimize this is to convert at video 300 kbps with audio of 128 kbps or lower. I use these paramaters with a normalize boost routinely for my conversions and they work out well. Don't go higher on the video bit rate unless you find significant artifiacts due to a high degree of motion in the source vid like in an action scene. Segmenting a large file into 10 minute pieces during conversion may also help minimize desynching.

Lord Eriol: Firstly, thanks for your excellent description and documentation of your problem. I've run into the same problem as you previously and have come up with a solution that I've posted before and will do so below. I did test it on the youtube vid that you've had problems with to make sure it works in your case.

Before I forget, I checked out your conversion parameters on your screen captures, and would suggest you decrease the video bit rate and increase the audio as follows: video bit rate of 300 kbps and audio 128 kbps. If you have video artifacts in a high action scene experiment with a higher video bit rate and see if it helps. It may not. I convert all my vids at 300 / 128 with a normalize of 0.65 and generally find this works well as I like to listen through my Optimus Cobalt's built in speaker. The volume increases without distortion. I use the higher audio bit rate as I find it can make a difference if playing the audio through speakers or with earphones. I use my player primarily to watch video and as a picture viewer.

To solve the video dimension issue, I stripped out the dimension commands from the AVIConverter ini file in v4. I'll include the command lines below. Copy and paste them in the Extra mencoder parameter box at the bottom of the advanced settings tab page. This will overide any dimension settings so you don't need to click any boxes or change any dimensions on the page. The other advanced parameters can still be changed. On my computer, I've saved these settings using the presets window at the top of the program window, so I don't have to copy and paste them for every series of conversions. Try all three of these with your youtube vid to see the differences in the result.

Full aspect
-vf-add scale=224:176 -vf-add expand=224:176:-1:-1:1

4:3
-vf-add scale=224:168 -vf-add expand=224:176:-1:-1:1

16:9 (Borders)
-vf-add scale=224:126 -vf-add expand=224:176:-1:-1:1
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