[mythtv-users] nuvexport created xvid files play fine on PC buthave stutter and audio delay on TV

devsk funtoos at yahoo.com
Sun Jan 7 03:50:23 UTC 2007

the purpose of the experiment was to use nuvexport to create the xvid AVI files using three different programs and to see which performed better and created a more desired output. what parameters nuvexport passes to individual programs is sorta macro fixed in the nuvexport scripts and driven by high level params like vbr, multi-pass, audio/video bitrate, how much to crop, whether to de-interlace or not, which nuvexport asks at the command line interactively and which you can specify using ~/.nuvexportrc to just keep hitting enter on each prompt after selecting shows.

Looking at two recent shows I transcoded with nuvexport with ffmpeg, I am beginning to like ffmpeg more and more!!

I am just wondering if I can replace the mythtv built-in "transcode to NUV" mechanism with nuvexport. Does anyone know if its possible? Its  just the initial show selection which is hard to automate.


----- Original Message ----
From: David Fishburn <fishburn at ianywhere.com>
To: Discussion about mythtv <mythtv-users at mythtv.org>
Sent: Saturday, January 6, 2007 6:00:20 PM
Subject: Re: [mythtv-users] nuvexport created xvid files play fine on PC buthave stutter and audio delay on TV


> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org 
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of devsk
> Sent: Saturday, January 06, 2007 6:57 PM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] nuvexport created xvid files play 
> fine on PC buthave stutter and audio delay on TV
> answering my own question. I found that ffmpeg creates a more 
> compliant avi compared to transcode, and fixed all my 
> problems with sync and fast forward. I recently did a 
> comparison of ffmpeg and transcode from nuvexport with the 
> same settings. I found ffmpeg to be a winner in all aspects: 
> quality, speed, compatibility and size closer to the 
> specified bitrate. I have uploaded two frame grabs for 
> comparison purposes
> http://home.comcast.net/~funtoos/transcode.png 
> <http://home.comcast.net/%7Efuntoos/transcode.png>
> http://home.comcast.net/~funtoos/ffmpeg.png 
> <http://home.comcast.net/%7Efuntoos/ffmpeg.png> 
> transcode is a little more smoothed out: note the sharpness 
> in curtain and sunlight falling on the door thru the curtain 
> in ffmpeg on the left side of the grab, whereas they are so 
> fuzzy in transcode. The avg. rate was 1471 for transcode and 
> 1508 for ffmpeg, for a specified rate of 1500. mencoder went 
> crazy with bitrates (used 2800 for a specified rate or 1500), 
> so was ruled out.

Can you show us the exact command lines you used to run
ffmpeg/nuvexport/mencoder.  I am just now beginnning to explore the various
options for transcoding recording to save space.


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