Looking for codec Intel ITU H.264

TeetimeNC wrote on 12/20/2013, 8:25 AM
I have some x264vfw source footage that I have to transcode to WMV. I am having problems with audio out of sync when I transcode. As a test I also tried transcoding to other formats such as Mainconcept AVC but still had the problem. VideoInspector says I am missing the Intel ITU H.264 video codec needed to properly decode the x264vfw, so I'm thinking this may be the problem. I'm not able to find this codec online. Can anyone here send me this codec?



malowz wrote on 12/20/2013, 9:31 AM
codec itself would not cause the out of sync on transcoding i believe.

if i were you, i would convert to a intermediate format first to make sure it will be decoded properly, then transcode to final format on the program you wish.

for opening a "difficult" format, i recommend avisynth and virtualdub. you can use "avisource" to open using VFW codec (ffdshow VFW module can decode it i believe) or using "directshowsource", one of them should play properly, enabling to encode to intermediate
robwood wrote on 12/20/2013, 12:39 PM
have you tried feeding it to HandBrake yet?

i've converted a number of unview-able clips from random sources using HB. saved me (on a b-roll kinda level) a few times.
TeetimeNC wrote on 12/20/2013, 1:46 PM
Thanks malowz. You may be right but let me elaborate on why I think it might be a problem with Vegas decoding. I can play the source footage in any number of players (e.g., Windows Media Player, VLC) and it plays fine. I can load the source video into Windows Movie Maker and it plays fine there. But if I load it into SVP the audio is out of sync even when previewing on the Vegas timeline. It seems to get progressively more out of sync as you go from start to end. I have matched the Vegas project properties to the source footage.

I'm not sure what intermediate format I could render to that would remove the sync problem I am seeing at preview. The fact that Vegas seems to be having problems decoding the source footage makes me think it is the missing Intel ITU H.264 codec. Suggestions?

amendegw wrote on 12/20/2013, 1:51 PM
Here's an interesting thread: V10 apparent bug rendering to WMV


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JohnnyRoy wrote on 12/20/2013, 1:52 PM
Jerry, Vegas Pro does not support editing x264vfw, DivX, or Xvid, so stop trying to use it on the timeline. It will just cause a lot of problems as you have seen.

Use some other program like AvidDemux 2.5 to convert your footage to whatever final format you need.

TeetimeNC wrote on 12/20/2013, 2:10 PM
@Robwood, I rendered to mp4 in Handbrake, loaded onto Vegas timeline and preview is in sync. Rendering a wmv from Vegas now to test. Not concerned with any quality degradation due to multi-generational renders so this may be a suitable workaround.

@JohnnyRoy, I say you are right, see above. We will experiment with Avidemux batch transcoding as well.

musicvid10 wrote on 12/20/2013, 2:11 PM
You're chasing the video codec, when we should be figuring why the audio codec is not working. Post mediainfo details and we'll start there. Remuxing to pcm may very well be in order. x264vfw "is" the correct video decoder.

BTW, there are a couple of ways to get lossless video encoding in Handbrake, I'll show you how if you're interested.
TeetimeNC wrote on 12/21/2013, 5:39 PM
Musicvid, I was using Vegas 10 when I experienced the problem. I used 10 to be compatible with my Client's system. When I load the problem video into Vegas 12 it previews and renders properly. But when I loaded it into After Effects AE threw an error saying it was having trouble conforming the audio, so there may be some problem with the audio. It would be useful to get this working with Vegas 10 if possible.

Here is the Media Info.
musicvid10 wrote on 12/21/2013, 10:09 PM
All you "should" have to do is open the file in AVIDemux, copying the video, and rendering the audio as PCM. The audio format you have is largely deprecated.
If the file is not terribly large, upload to Google Drive or Dropbox, and I'll be glad to remux for you. Shouldn't take very long.
TeetimeNC wrote on 12/22/2013, 6:28 AM
Musicvid, it is a pretty large file. When I open it with AVIDemux I get:

"H.264 detected. If the file is using B-frames as reference it can lead to a crash or stuttering. Avidemux can use another mode which is safe but YOU WILL LOSE FRAME ACCURACY. Do you want to use that mode?"

I respond No, to which it throws "No audio decoder found for this file. "Save (A+V) will generate bad AVI. Save audio will work."


musicvid10 wrote on 12/22/2013, 9:09 AM
if handbrake is working stick with that.