Bad audio quality w/ tmpgenc

[bitstream2002]

Hello there!

When encoding a ripped DVD as VCD, I have a problem with the sound: Where high frequencies appear and with some voices there occur metallic-sounding disturbances. When and why does this happen and how can I prevent this? Peculiar enough, this only happens with some movies!

I am using SmartRipper (2.41), DVD2AVI (1.76) und TMPGEnc. (2.57.41.146). The sound settings I am using with TMPGEnc are:

Stream type: MPEG-1 Audio Layer II
Sampling frequency: 44.100 Hz
Channel mode: Stereo
Bitrate: 224 kbit/sec
Change volume: 200%

Hope you can help!

[poopyhead]

Hello there!

When encoding a ripped DVD as VCD, I have a problem with the sound: Where high frequencies appear and with some voices there occur metallic-sounding disturbances. When and why does this happen and how can I prevent this? Peculiar enough, this only happens with some movies!

my best bet is for you to take a look at dvd2avi when you're creating the .d2v project file....look in the audio section of the info box that appears. i bet the audio info is DD 2/0 192 kb/s.

if indeed this is true, choose another audio track that is higher than 192 kb/s. (make sure it's the audio track u want and not some foreign language)

[sterno]

The sample rate converter (for converting 48kHz DVD audio to 44kHz VCD audio) in tmpgenc is pretty bad. It's one of the main causes of "metallic" audio. Download ssrc and use it as an external tool in tmpgenc, it's slow but higher quality.

The MP2 encoder in tmpgenc is acceptable, but not outstanding. Use toolame as an external tool, it is a little better. Once in a while I find that toolame crashes for some reason on a file, and I just turn it off for that file. I don't notice a difference, but some people with really good sound systems and really good ears can.

[wulf109]

You could also try setting Tmpeg's audio sampling rate to 48000 instead of the default 44100. 48000 is standard DVD sampling rate and most DVD players will support it. Try a sample file on a CDRW if you want to test your DVD player.

[bitstream2002]

Hello,

thanks for all your answers! The source audio stream is a typical AC3 5.1 stream, so it has much more than 192 kbps. I will try out tooLAME as soon as possible.

[p_l]

The same problem drove me nuts for the longest time. What solved it for me was using the SSRC plug-in for TMPGEnc. Start reading at the top of this thread.

Hope this helps!