[mythtv-users] MythArchive DVD too large

[Paul Harrison]

Ted Anderson wrote:
> Paul Harrison wrote:
>   
>> Ted Anderson wrote:
>>     
>>> Total size of video files, before multiplexing, is 9708 Mbytes, audio is
>>> 620 MBytes, menus are 30 MBytes.
>>> Need to shrink MPEG2 video files to fit onto recordable DVD, video is
>>> 6354.4 MBytes too big.
>>> Need to scale by 2.65522271425
>>> tcrequant /myth/tmp/work/1/stream.mv2 /myth/tmp/work/1/video.small.m2v
>>> 2.65522271425
>>> [tcrequant] MPEG2 Requantiser by Makira.
>>> [tcrequant] Using 2.655223 as factor.
>>> ...
>>> [Same for all 8 entries]
>>> ...
>>>   
>>>       
>> It could just be that your pushing tcrequant too far. A factor of 2.6 is 
>> very high.  I'm in the process of adding the UI part of the option to 
>> re-encode files using a given encoding profile that would allow you to 
>> fit more files on a DVD by choosing an encoder profile that will shrink 
>> the file sizes by using lower bitrates. I'm not making much progress at 
>> the moment with the World Cup in full swing so it might take a while :-)
>>     
>
> After further review it seems that tcrequant is working just fine; the
> problem is that the script can't count :-) Before requant the 8 videos
> are 2.2 GB for a total of 17.6GB, not the 9.708 reported before the
> tcrequant operation. After the tcrequant process the video files are
> indeed 2.655223 times smaller, making them each ~840MB for a total of
> ~6.6GB. So, it looks like I really needed to work tcrequant harder,
> somewhere in the neighborhood of 3.9 instead of 2.6. The video isn't the
> best after that, but as it's Sesame Street for my 18 month old I'm not
> concerned about fabulous quality. 
OK thanks for tracking that down. I'll take a look at why its getting 
the size wrong when I get a chance.
 
> In any case, with 2 wins so far it looks like you'll be celebrating a lot!
>
> Ted
>   
Yep.  Come on England!! :-)

Paul H.