Fixing a divx file

[didikai]

I have a Divx movie that is very dark. Is there a way I can brighten it?

Thanks

[Abond]

TV or PC?

[didikai]

TV or PC?

Sorry, yes it's a DivX movie on a DVD

[TBoneit]

In the Computer I play with VLC and just adjust the brightness there to my satisfaction. Playing in my Divx Player, Philips 5982, I go to setup and adjust the brightness there.

Anything else will require re-encoding and a loss of quality.

[didikai]

In the Computer I play with VLC and just adjust the brightness there to my satisfaction. Playing in my Divx Player, Philips 5982, I go to setup and adjust the brightness there.

Anything else will require re-encoding and a loss of quality.

So how can I recode?
I don't mind a bit of quality loss.

[Baldrick]

Virtualdubmod,
open avi, select no if it wants to rewrite mp3 headers
video->full processing mode
video->filters and add brightness/contrast filter and use the preview to check that it looks okey
video->compressin and choose divx and choose same bitrate as the source
file->save as a new avi

[didikai]

Virtualdubmod,
open avi, select no if it wants to rewrite mp3 headers
video->full processing mode
video->filters and add brightness/contrast filter and use the preview to check that it looks okey
video->compressin and choose divx and choose same bitrate as the source
file->save as a new avi

Mr Baldrick comes to the rescue agin.
Many thanks

[didikai]

Virtualdubmod,
open avi, select no if it wants to rewrite mp3 headers
video->full processing mode
video->filters and add brightness/contrast filter and use the preview to check that it looks okey
video->compressin and choose divx and choose same bitrate as the source
file->save as a new avi

So far so good, but when I preview the sound and video is really choppy.

[poisondeathray]

So far so good, but when I preview the sound and video is really choppy.

Are you previewing in Virtualdub? It's not the best media player and preview results are not always indicative of results of the final media file.

[Baldrick]

It's normal. The preview playback realtime renders the filters and it requires a very fast cpu.

[didikai]

It's normal. The preview playback realtime renders the filters and it requires a very fast cpu.

O.K. video looks great, but massively out of sync with the audio. Is this getting to be more trouble than it's worth?

[poisondeathray]

I'm guessing that you had VBR audio in the original file - this frequently causes problems.

If you're not ready to give up yet, i can suggest 2 options:

1) Demux the good audio track from the 1st file using yamb. In the newest version of virtualdub, you can specify audio from a different source. So open the "good video" file, and specify the audio from "good audio" track. Use video=>direct stream copy.

2) Use avidemux to do the whole process. It recalculates the VBR time map and re-indexes the file. It has many filters (including brightess), and functions in a similar fashion to virtualdub, but has support for more file types. It doesn't have DIVX, but uses the open source XVID instead; but for all intents and purposes will give you similar results.

Cheers

[Baldrick]

Did you use virtualdubmod? not virtualdub.
Did virtualdubmod ask if it you wanted to rewrite the mp3 header when opened the avi?
What is the audio format?

[didikai]

Did you use virtualdubmod? not virtualdub.
Did virtualdubmod ask if it you wanted to rewrite the mp3 header when opened the avi?
What is the audio format?

I get a mesage saying it is an improper VBR audio, and do I want to change it. I say yes, but it is miles out od sync.

[jagabo]

Just say no.

Or use VirtualDub 1.8.

[didikai]

Just say no.

Or use VirtualDub 1.8.

When I say no it crashes.
Can't get VD 1.8. That crashes as well when I try to download it!