AV Tech

From GreyWiki
Jump to: navigation, search

General Playback

WMV and ATI

"I'm having a problem with WMV videos, whenever I play them I get a pink and turquoise color. AVIs and other video files work fine."

You may have an ATI video card with recent CATALYST drivers. If so, right-click your desktop, choose Properties, click the Settings tab, click the Advanced button, click the Options tab, and deselect "WMV Acceleration." You might have to reboot.

Making DVDs

For most VHS-to-DVD stuff, NeroVision Express does the job. However, we're finding that getting fansubbed anime onto "regular" DVD without losing the subtitles due to overscan is a tricky damned process. So, here we document the tips and tricks that should make it work...

Fansubs

Using NVE, force the aspect ratio to 16:9 to get matte bars on the sides, which forces "regular" TVs to "letterbox" the image. This prevents the subtitles from falling off the bottom of the screen due to overscan.

AVI to MPEG2

From videohelp.com, this tip:

"If TMPGEnc says that the video time / runtime is way too long or TMPGEnc keeps encoding after the end of video with only a black screen Try change the directshow reader priority, in TMPGEnc under Option->Environmental settings->VFAPI plug-in and right click on the DirectShow Multimedia File Reader and increase the priority to 2 or to the top of the plugin-list and reopen the video. If that doesn't help try convert the audio to WAV audio before converting and use the wav as audio source."

We want to do both of these things, actually. Most of the anime is decoded with DirectShow filters, and TMPGenc doesn't like the VBR MP3 audio tracks that many fansub files come with.

AVI audio to WAV

  1. Select under Audio->Full processing mode.
  2. Select Conversion.
  3. Set the Sampling rate to 44100Hz (if you are going to make a DVD later, set it to 48000Hz instead).
    1. (Optional step. Select under Audio->Compression and choose MP3 if you want to convert to MP3 audio or some other compression. Remember to install a MP3 Audio Codec like the free Lame Encoder first)
  4. Save the wav by clicking on File->Save WAV.
  5. Save it to a new wav file.
  6. If encoding to VCD,SVCD or DVD then launch your encoder and select the wav as the audio source.

Normalizing Audio

If we're forced to pre-process audio, make sure not to normalize above about 85% to ensure we don't overdrive the speakers. Note that in NVE we can drop the "original" audio to 0% and then place the processed audio track right alongside; this allows us to replace low-quality, low-level audio with sound that's been fixed up.