When I start to render my videos the output file contains some "sound artifacts". I mean, sometimes the sound oscilates. Here is an example:

http://www.youtube.com/watch?v=qao52shBWgQ

At 0:13 and 0:14 the sound is not correct. There's something wrong. Can you notice it? Thanks.

What type of camera are you using? For example, sometimes DV cameras have errors in their stream (quite common actually), and normally they will create a beep sound, but FFmpeg converts the error samples to silence.

I saw in your redundant report you used a Flip camera. Hmm, I don't know what would cause that issue. Do you hear that in a desktop player before the YouTube conversion?

Hi ddennedy. Yes, I used a Flip UltraHD pocket cam. And yes, I can hear these strange sounds before sending to youtube. Thank you!

Ps: I don't hear these sounds inside Kdenlive. I hear it just after the rendering process... with the resulting file. I use H264 with AAC (from Flip cam) and mp4 container.

Ps2: I created a bug report with sample files and a way to reproduce that

http://www.kdenlive.org/mantis/view.php?id=1738

I uploaded a sample.mp4 file and the result mp4 file with the original project file. It's very clear and easy to listen to the audio artifacts. Thanks.