Re: video transcoding by quality instead of specifying bitrate
- From: "Ken Maltby" <kmaltby@xxxxxxxxxxxxx>
- Date: Mon, 8 May 2006 17:01:32 -0500
<janbeck@xxxxxxxxx> wrote in message
I would like to transcode a few video files to H264 from various source
codecs and resolutions. Most utilities I have looked at require that I
specify the bitrate. Is there a utility that will adjust the bitrate to
approximately match the source material quality?
I've been looking at AVC/H264 encoding for some time now and purchased
and tried : both Cyberlink's PowerEncoder MPEG4 AVC Edition and
Elecard's Mobile Converter & codec packs.
So far none of the commercial encoders I've tried were any better than
the free "x264" codec based encoding. The property page/configuration
page lets you set the bitrate for/by:
Single Pass - Bitrate (Average Bitrate)
Single Pass - Quantizer (Quality)
MultiPass - (Target Bitrate)
I have excellent results using that codec and Single Pass Quantizer
set at "22". I've used it encoding from VDubMod and the TMPGEnc.
I'm in the process of converting a large volume of captured satellite TV
programming, whole series, all the seasons, all the shows. There is the
capture and conversion of current broadcasts, as well.
The capture is as Half D1 (352x480)MPEG2 ~2000Kbps. I convert
to AVC at "Full D1" (really-720x480) and end up with .avi files of a little
less than half the size of the captured .mpg.
The routine that I've settled into is using TMPGEnc 3.0 Xpress,
and its Crop filter for those shows that have been letterboxed. But
any program that lets you encode using a selected codec and lets
you set a profile for encoding, would work as well.
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