Video doesn't play back its MP2 audio (update: I can hear the audio now)

[Chainmax]

I recently downloaded a Nike commercial, it's an MPEG2 file with MP2 audio. When trying to play it, the video is fine but the audio is mute and the only decoding icon that shows up is ffdshow's audio decoder. When feeding the video to TMPG's demultiplex tool, only the audio shows up.
Now, I can transcode the video using AVisynth, but if I mux it with the original MP2 then the audio is mute as well. If I transcode the MP2 into an AC3, and mux it with the transcoded video, the audio does play but it's not in synch with the video anymore. What would you suggest me to do? I can upload the commercial somewhere for you guys to test.

[setarip_old]

Since you've specifically stated that it's a commercial, I presume it's acceptable to answer youWhen trying to play it, the video is fine but the audio is mute...When feeding the video to TMPG's demultiplex tool, only the audio shows up.This sounds contradictory.

Load the file into VirtualDubMOD and post a screengrab of the "File Information" box...

[Chainmax]

Here's VDubMod's File Information after loading the video:
http://img359.imageshack.us/img359/1447/vdubmodfileinfo6wk.png (http://imageshack.us)


Here's what appears on TMPG's simple demultiplex window after loading the video:
http://img489.imageshack.us/img489/153/tmpgdemultiplexinfo9lf.png (http://imageshack.us)

Both times, the video was loaded as-is (i.é: I didn't use an avisynth script with directshowsource).

[setarip_old]

Are you using a purchased version of TMPGEnc that includes MPEG-2 processing capability, or a freeware version that doesn't include MPEG-2 capability? If I transcode the MP2 into an AC3...Convert the audio to .MP3 - and then use VirtualDubMod to multiplex with the videostream and save as .AVI...

[Chainmax]

It should have MPEG2 encoding enabled, the trial lasts 30 days, right? As for saving as AVI, is that wise with MPEG2 video?

[setarip_old]

As for saving as AVI, is that wise with MPEG2 video?Try it, for the minute or so that it'll take you (to convert the audiostream to .MP3 and then use VirtualDubMod to multiplex with the videostream and save as .AVI)...

[Chainmax]

Weird, TMPG's Multiplex option detects both audio and video :confused:. Ok, on to the testing...

[edit]Mmm...the video file extracted with Multiplex is unusable. I'll try opening the original video in Avisynth with DirectShowSource.

[edit2]Something really fishy os going on. This is what VDubMod reports:
http://img422.imageshack.us/img422/4742/saywaht1ma.png (http://imageshack.us)


when using the following Avisynth script:

DirectShowSource("X:\wherever\Nike - Olé.mpg",fps=25,audio=true)
FFT3DFilter(sigma=1,bw=32,bh=32,bt=3,ow=16,oh=16,sharpen=0.7)
LanczosResize(320,256)
AddBorders(16,16,16,16)

Can I just upload this advertisement somewhere so that you can have a go at it?

[setarip_old]

You've completely lost me! Is this most recent screengrab (of an .AVI) one of a different file than the one you downloaded (an MPEG-2)?

Is there a specific reason you haven't tried what I've suggested?

[Chainmax]

I was going to try your suggestion, but for that I had to extract the audio. The Demultiplex tool, contrary to the Simple Demultiplex one, was able to detect the video. I tried to play back that video to no avail, which is when I opened this script in VDubMod in order to make a direct stream copy. I didn't proceed because of this file information report.

[setarip_old]

I was going to try your suggestion, but for that I had to extract the audio.Well, if you're not willing to make such a small effort...

[Chainmax]

I am going to, but this problem I encountered midway through the process intrigued me and therefore I wanted to ask about it.

[Chainmax]

I finally managed to considerably clean up my encoding/filtering backlog and will try your suggestion ASAP. Will report back soon.

[Chainmax]

When loading the mpg directly in AVIMuxGUI, this was reported in the audio section:

http://img186.imageshack.us/img186/5835/avimuxguimessage6oa.png (http://imageshack.us)


I couldn't get just the video, so I loaded the mpg in avisynth via DirectSHowSource with audio=true, encoded the video to ffdshow's YV12 huffyuv, converted the audio to WAV and used RazorLAME w/LAME 3.97b2. At the end of the encoding, this error message appeared:

http://img256.imageshack.us/img256/7397/razorlameerrormessage3wi.png (http://imageshack.us)

The MP3 appeared fine though. Anyway, I muxed the lossless encoding and the MP3 audio with AVIMuxGUI and no audio plays back.

[Chainmax]

setarip_old? Are you there?

[setarip_old]

Again, is there a specific reason you haven't tried what I've suggested?

[Chainmax]

...
I couldn't get just the video, so I loaded the mpg in avisynth via DirectSHowSource with audio=true, encoded the video to ffdshow's YV12 huffyuv
...
I muxed the lossless encoding and the MP3 audio with AVIMuxGUI and no audio plays back.

I tried your suggestion to the best extent I could.

[setarip_old]

I can transcode the video using AVisynthSorry, but either I just can't follow what you've said you can and cannot do - or you're changing things in midstream.

Perhaps another member will be better able to work with you on this particular subject...

[Chainmax]

I found out that using PowerDVD to play the video makes the audio play as well. Is there a way to use PowerDVD's decoders within Avisynth so that I can extract this problematic MP2 and decompress it to WAV?

[Chainmax]

Anyone?

[gameplaya15143]

Last time I checked.. mp2 isn't really supposed to support VBR (it can be done, but it's not really 'standard').

Suggestion: Try using ac3filter to decode the mp2 audio instead of ffdshow.

Can VLC play the file properly?

ps. I think graphedit could be very useful on this one.

[Chainmax]

VLC 0.7.2 can't even play the video. The only thing that has been capable of playing bith video and audio is PowerDVD.
How would I go about using GraphEdit for this? I never used it and have no idea how.