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Old 17th December 2009, 15:45   #1  |  Link
EpheMeroN
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Audio Resampling

How can you resample a 24000Hz audio file to 48000Hz without losing sync with video?

I tried to use SSRC because it's worked in the past when I've done 44100Hz to 48000Hz, but never a resampling like this, and it created out of sync audio/video.
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Old 17th December 2009, 22:53   #2  |  Link
markanini
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Quote:
Originally Posted by EpheMeroN View Post
How can you resample a 24000Hz audio file to 48000Hz without losing sync with video?

I tried to use SSRC because it's worked in the past when I've done 44100Hz to 48000Hz, but never a resampling like this, and it created out of sync audio/video.
I recall reading that ssrc was broken for conversions between some samplerates. Try SoX, it's conversion quality is state of the art. Read more here: http://sox.sourceforge.net/SoX/Resampling
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Old 17th December 2009, 23:21   #3  |  Link
tebasuna51
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Without problems using eac3to (with libSsrc.dll):

eac3to 24KHz.wav 48KHz.wav -resampleTo48000
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Old 20th December 2009, 11:27   #4  |  Link
Midzuki
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Quote:
eac3to 24KHz.wav 48KHz.wav -resampleTo48000
if necessary, add "-down16" to the command-line given above.

Quote:
How can you resample a 24000Hz audio file to 48000Hz without losing sync with video?
24kHz to 48kHz can be a lossless process,
if you have the patience to do it manually

(for example,

Code:
mono@24k channel --> stereo@24k.WAV --> pcm.RAW --> mono@48k channel
)
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