[olug] DVD Ripping

[T. J. Brumfield]

Thanks!

Most of the info I was finding on Doom9 was a few years old, and I
didn't know how relevant it still was.

-- T. J.

On Thu, Oct 16, 2008 at 12:58 PM, Will Langford <unfies at gmail.com> wrote:
> http://www.compression.ru/video/codec_comparison/pdf/msu_mpeg_4_avc_h264_codec_comparison_2007_eng.pdf
>
> Lengthy PDF.
>
> Synopsis: x264 does very well.  Quality and bitrate to 'matching quality'
> are both excellent.
>
> Copy and paste of some relevant info (start around page 29):
>
> 4.4.2 Movies
> The leading encoders in this category are x264 and MainConcept. The quality
> of the AMD encoder is again rather low.
> 4.4.2.1 High Quality Preset
> The x264 encoder demonstrates better quality for all sequences except the
> "Lord of the Rings" sequence (for approximately 10% of the bitrate and for a
> fixed quality), but it yields slower performance at the same bitrate for
> 30%. For the "Lord of the Rings" sequence, the MainConcept encoder is faster
> and yields better quality. The bitrate handling algorithm of these codecs is
> acceptable for this category. The Intel IPP codec once again holds third
> place. In some cases the Intel IPP encoder performs more poorly than the
> MainConcept encoder, but it still provides rather stable performance.
> Comparison of the XviD and AMD codecs with other codecs is difficult, as
> they are faster and show lower quality for a fixed bitrate. The objective
> quality of the AMD encoder is lower than that of XviD, but the AMD encoder
> is approximately 10 times faster. Also, the AMD encoder has problems with
> bitrate handling (for some sequences the bitrate exceeds the target rate by
> 100%).
>
> 4.4.3 HDTV
> 4.4.3.1 High Quality Preset
> The x264 and MainConcept codecs demonstrate the highest quality among all
> the codecs tested in this comparison. The encoding quality of the x264 codec
> is greater than quality the MainConcept encoder, the speed is slower. The
> third-place encoder, rated by quality, is the Intel IPP codec. Nevertheless,
> it is slower than MainConcept. The AMD and XviD codecs, as usual, are faster
> than all the competitors.
>
> 4.4.4 Overall Conclusions
> Overall, the leaders in this comparison are the MainConcept and x264
> encoders, with the Intel IPP encoder taking a strong third place. The XviD
> (MPEG-4 ASP) codec is, on average, better than the AMD and Artemis x264
> codecs, which proves that the AMD and Artemis x264 encoders did not use all
> of the features of the H.264 standard. The main reason of AMD encoder low
> quality is very high speed of the encoder. The XviD codec demonstrates
> difficulties with bitrate handling algorithms, so does the AMD encoder as
> well.
>
> The overall ranking of the codecs tested in this comparison is as follows:
> 1. MainConcept
> 2. x264
> 3. Intel IPP
> 4. XviD
> 5. Artemis x264
> 6. AMD
> This rank based only on quality results of encoders (see Figure 35).
> Encoding speed is not considered here.
> The difference between the MainConcept and x264 encoders is not overly
> significant, so these two encoders are both the clear leaders in this
> comparison. The developers of the Artemis x264 encoder do not provide a High
> Quality preset, so its ranking is based solely on the results for the High
> Speed preset. The quality of the Artemis x264 (H.264) codec is lower than
> that of XviD (MPEG-4 ASP), which means that the developers of Artemis x264
> did not employ the x264 encoder, which they modified, to its fullest
> potential. The low quality of AMD could be explained by its high encoding
> speed; the developers of the AMD codec did not provide a "slow" preset for
> use in this comparison, so tests of the AMD codec only used a very fast
> preset (5 to 10 times faster than that of its competitors).
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