[mythtv-users] 68% filesize increase after transcode!

[Greg Grotsky]

Dave, I tried transcoding the same episode to MPEG4 and it came out 40%
larger than the original MPEG2 transmission. I don't know why anyone would
use these methods if they want to keep their videos the same dimensions as
they are broadcast, since it looks like they actually ballon in size instead
of shrink. :( I guess if I was scaling them down as well I'd see a size
decrease but is it worth it?

Both the 68% increase and 40% increase were seen using the default settings
for both RTJPEG and MPEG4 screen settings.

Are you using the default settings?

Thanks,
 -Greg

On 9/24/05, Dave Sherohman <esper at sherohman.org> wrote:
>
> When I first set up transcoding, I went with RTjpeg since it was the
> default and I saw no significant change in the size of my programs -
> about 2.1G/hour before and 1.9G/hour after. Then I tried mpeg4 and
> (with the default settings) that got me 750-800M/hour. So I'd say
> that, if the quality is acceptable to you, mpeg4 definitely looks
> like the way to go.
>
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