mpeg-1 file to avi

[jaapaa]

I have some content which is in mpeg-1 format.
Gspot displays render path as:
(S) --> MPEG-I Stream Splitter --> MPEG Video Decoder --> (R)
(S) --> MPEG-I Stream Splitter --> MPEG Audio Decoder --> (R)

I'd like to convert that for a decent avi. I figured it would save lots of space as exracting just the audio and recompressing it (mp3&ogg) will get me space saving. Or am I totally mistaken already?

Problem is that I haven't found any good manuals for what I want to do. I have gordian knot and the tools that came with it. With virtualdubmod I can easily convert the .mpeg to avi processed with XViD, but virtualdubmod doesn't have any options for audio. So audio gets included as uncompressed PCM, which results to _huge_ file. Original is 10 megs, here is the result:
Name.........: sample.avi
Filesize.....: 15.1 MB (or 15,544 KB or 15,917,056 bytes)
Runtime......: 00:01:00 (1,809 fr)
Video Codec..: XviD
Video Bitrate: 689 kb/s
Audio Codec..: PCM Audio
Audio Bitrate: 1411 kb/s (705/ch, stereo)
Frame Size...: 352x240 (1.47:1) [=22:15]


VirtualDub (without mod) on the other hand has options for audio processing, but it does not seem to support compression by XViD, only DivX (which I don't plan to use).

Am I trying to achieve something stupid here as seems like nobody else has done it?
If it's not impossible, what would be the correct tool for it?

[stephanV]

huh?

VDub doesnt support XviD... but it does, just as every other vfw codec.

anyway, the audiomenu in VDM is in streams-->streams list (right click on the stream for options)

[jggimi]

http://www.doom9.org/vdubmod-procedures.htm

[jaapaa]

This is the 1st time I say thank you for someone telling me to RTFM.
I had done lots of RTFM, but not the right ones..
http://www.doom9.org/vdubmod-procedures.htm
With the small detail about nandub did the thing...

So here is what I think is the procedure (I just woke up, error may appear in my text)

- demux the mpeg so that you get .wav for the sound
- compress the mpeg with XDiV and create avi, ignore the audio options
- Compress the wav to mpeg (with lame etc)
- Use nandub to join the video and audio. Set video to direct stream copy. Now here is the thing that solved everything: At audio, selevt the MP3 and also set audio to direct stream copy

That did the thing!
Original sample was 10 megs, now I have 5.98 meg file, which image quality seems unaffected to the original.

AVI File Details
========================================
Name.........: sample2.avi
Filesize.....: 5.98 MB (or 6,126 KB or 6,273,024 bytes)
Runtime......: 00:01:00 (1,809 fr)
Video Codec..: XviD
Video Bitrate: 693 kb/s (0.274 bits/pixel)
Audio Codec..: 0x0055(MP3) ID'd as MPEG-1 Layer 3
Audio Bitrate: 128 kb/s (64/ch, stereo) CBR
Frame Size...: 352x240 (1.47:1) [=22:15]

[jaapaa]

God darn, now I figured how to use the stream menu....
One doesn't need nandub at all..

[killingspree]

cheers

i have to admit the vdub procetures guide needs updating! ;)