[FFmpeg-user] [Bulk] Muxer Catch-22 with '-target pal-dvd'

[Tim Nicholson]

On 05/04/13 10:17, Francois Visagie wrote:
> Hi All,
> 
>  
> 
> Just a heads-up for the odd DVD being authored in SD resolution still,
> there's a Catch-22 with the '-target pal-dvd' option.
> 
>  
> 
> When encoding without that option, the (grantedly intermediate) output
> file's audio cannot be played by some DirectShow applications like Windows
> Media Player (see ticket 1720 <https://ffmpeg.org/trac/ffmpeg/ticket/1720>
> ).
> 
>  
> 
> The work-around is to apply '-target pal-dvd'.
> 
>  
> 
> However, when encoding 704-wide Rec.601 source like DV (perfectly legal
> resolution for DVD), this option causes distortion by forcing horizontal
> resolution to 720 pixels (see ticket 2434
> <https://ffmpeg.org/trac/ffmpeg/ticket/2434> ). Some background on Rec.601
> sources and 704-pixel horizontal resolution at
> http://en.wikipedia.org/wiki/Pixel_aspect_ratio.
> 
>  
> 
> The work-around in this case is _not_ to use '-target pal-dvd' but to
> specify the DVD-compliant encode using individual options, e.g.
> 
> '-codec:a ac3 -b:a 128000 -codec:v mpeg2video -g 15 -bf 2 -bufsize 1835000
> -b:v 6090000 -maxrate 9800000 -muxrate 10080000'.
> 

It is easier to still specify -target pal-dvd then afterwards overide
the size with -s 704x576.

>  
> 
> In this case the output file's audio won't be playable by Windows Media
> Player and similar and can't be demuxed by e.g. Avidemux for authoring.
> Work-arounds are remuxing the output in another application, and/or using
> another player like Media Player Classic, and/or demuxing for authoring with
> ffmpeg itself or another application.
> 
>  
> 
> Cheers,
> 
> Francois
> [...]


-- 
Tim