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Is my PC quick enough for AVCHD?  
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Pondělí, 29. září 2008

Recently I bought HD Camcorder Canon Vixia HF100. However, before the actual purchase, I had not been quite sure if my laptop would manage to play the records back without interruptions.

As far as I knew, there were no sample videos available. To improve the situation and to help other potential buyers, I put a sample video and a sample photo at the following locations:

Canon HF100 AVCHD Sample Video, 25.1 MB, 11 seconds, best quality
Canon HF100 Sample Photo, 738 KB, best quality

Now you can see if you would be better off with a new machine, or if the current one still suffices for the playback. But even if the playback stutters, things can be considerably improved using a proper codec.

Canon HF10/HF100 uses Advanced Video Codec High Definition (AVCHD), more specificaly H.264/MPEG4 AVC. Most likely, you will experience one of the following problems:
  • No video at all

  • No sound at all

  • Video playback stutters

  • The image gets blured when moving the camcorder horizontaly (so called interlace combing).

If there is no video at all, any codec pack can improve this. You can try K-lite Codec Pack for example, to get at least some output. However, the playback will be probably slow, and the deinterlacing will not work properly.

If there is no sound, you should download and install any AAC (Advanced Audio Coding) codec. One example is free CoreAAC codec.

The tackle the letter two problems, the only solution seems to be using CoreAVC. Allegedly, this is the fastest available AVCHD codec. I can confirm that this was the only working solution for me. Even though the official codec available on the CD with the camcorder dealt good with the interlace combing, the speed was not sufficient for me. My laptop contains Intel Core 2 Duo T5750 @2.0 GHz with 3 GB of RAM, whereas the offical requirement for Windows Vista & Dual Core was something like 2.13 GHz and 2 GB RAM. This resulted in a discuntinuous playback.

On the other hand, CoreAVC worked perfectly well. You can download a free 14 days evaluation version and try it yourself.

When playing back using this codec, an appropriate icon appers in the system tray. Click it and a settings dialog appears.

The only thing you should be aware is that the codec is not prioritized, even when the preferred decoder checkbox checked. You can test what codec is actualy in use after going to the levels tab. When changing brightness/contrast/saturation, the changes should be immediately notified. If not, a different codec is still in play. Eventualy, I had to uninstall both the K-Lite codec pack and the official codec provided by Canon on the installation CD. Next, I installed XP Codec Pack 2.4.2, chose a custom setup, and excluded the supplied .H264 codec from the installation. Hence now I am able to play back .H264 using CoreAVC whereas all other formats using XP Codec Pack.

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vystavil Václav Slavíček v
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