YouTube MP4 audio sync

ingvarai wrote on 9/2/2010, 4:52 AM

My the audio of my YouTube video is hopelessly out of sync. I use the build in MP4 render setting in Vegas. The YouTube help recommends using MP3 for sound, to solve audio sync issues. But there is no such option under the Vegas MP4 render settings. Or..?

What do you do in such a case?

Ingvar

Comments

altarvic wrote on 9/2/2010, 4:59 AM

Hi, try Video4YouTube and let us know if it helped you to solve the problem

Derm wrote on 9/2/2010, 9:11 AM

Hi,
Does it solve that problem?I have noticed that the sync gets worse the higher the resolution is.

Derm

altarvic wrote on 9/2/2010, 9:49 AM

This is probably due to the fact that the MP4 file is not progressively stream (no Fast Start)
Read this topic.
Video4YouTube can make mp4 ready for streaming, using mp4box. Read the manual for more details.

ingvarai wrote on 9/3/2010, 7:20 AM

Hi, try Video4YouTube and let us know if it helped you to solve the problem
Hm.. can this do something that I cannot already do myself in Vegas?
I feel this is not the answer.
What other formats than MP4 can be rendered from Vegas for YouTube?
Ingvar

ingvarai wrote on 9/3/2010, 7:27 AM

>Video4YouTube can make mp4 ready for streaming

Isn't this exactly what YouTube does after upload, when processing my video? I thought YouTube took care of this. When I watch YouTube videos, they definitely are streamed..
Ingvar

A. Grandt wrote on 9/3/2010, 10:33 AM

Is this problem something new (starting within the last week)?

About a week and a half ago I uploaded a few dozen videos of varying length (3-15 minutes) with absolutely no problem, using the Sony AVC codex and .mp4 container.

Template:
Video Format: AVC
Frame Size: 1280x720
Profile: Baseline
Entrophy coding: CAVLC
Framerate: 25fps
Field Order: Progressive
Pixel ratio: 1,0000
Bitrate: 6.000.000 (4Mbps works just fine too)

Audio Format: AAC
Sample rate: 48000
Bit rate: 128000
Audio encoding mode: Stereo

altarvic wrote on 9/3/2010, 11:14 AM

"Hm.. can this do something that I cannot already do myself in Vegas?"

Of course you can do this, I just suggested you the easiest way

"What other formats than MP4 can be rendered from Vegas for YouTube?"

File formats for Youtube

i c e wrote on 9/3/2010, 11:36 AM

I had the exact same problem many times.
here was my whacked out solution:

go into your project, use the multi select tool, select ALL your audio. Move a tiny bit in either direction.. render a small test clip.. test it.. do it till you get it right..

crazy but works. The only way I could get it. *Sigh.

peace

ingvarai wrote on 9/4/2010, 3:38 AM

>Move a tiny bit in either direction.. render a small test clip.. test it.. do it till you get it right..

Yes, this works! I got it almost perfect by delaying sound 4 frames. My source is 1280x720 25p
Another thing I notices, when deviating a little from the built in Vegas Interbet MP4 template, YouTube processed my video much faster. I tried it twice to see if it was just a coinicidence.
(Maybe it still is)
Default template: YouTube needs time to process my 10 seconds long test rendering ("your video is being processed")
When setting the audio sample rate to 44 100 Hz and the Bit rate to 96 000, the video was available immediately after upload, and I mean it: Immediately all right.
Has anyone any thoughts about this?
Ingvar

i c e wrote on 9/4/2010, 8:55 AM

crazy huh?

basically YouTube is like this: lower quality= faster everything. High quality= slower everything.

peace