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How-To Geek Forums / Windows Vista

(Solved) - Some avi files won't play - missing codec?

(37 posts)

I can't play the avi files from my camera. WMP doesn't give an errormessage or anything, just a black screen. Irfanview at least gave the errormessage 'Can't find decompressor vids: mjpg' and 'Video not available'. So I followed the FAQ on the Irfansite to find the codec. Downloaded and installed it and there is some improvement: I have a still at the start of the avi and there is sound, but no video.

What's wrong?

Sarah.

Video files have two codecs. One for audio and one for video. It appears you found one for sound but not video.
What is the model number of camera you have?

Sarah, I also have a camera (Canon PowerShot) that takes movies in MJPEG format. This stands for 'Motion JPEG' which is a format that does very little compression making it easy for a camera to process. The resulting files are larger, but easy to edit.

I also have IrfanView -- an awesome pic viewer, BTW -- but, it's not really the best media player. Although I have codecs installed to decompress MJPEG, I get the same message from IrfanView that you get. That's because IrfanView uses and older codec scheme (VFW), not the most recent DirectShow scheme. Oh, the audio plays back because it's 'PCM' format which is essentially uncompressed and doesn't require a codec.

So, first thing that you should do is try playback from another media player. From previous threads, I remember that you don't like WMP and are using Winamp instead. The latest builds of Winamp do support DirectShow Filters for decompression, so the codec that you got may already work. If Winamp won't do it, you should at least try WMP if you can stomach it.

What codec did you download? The one I use that handles MJPEG is ffdshow-tryouts which is very capable, but not very user-friendly.

@ jd2066 - I have a traveler DC-XZ6

@ScottW - Since everybody kept telling me not to delete WMP, because I would get into trouble and deleting it doesn't make a big difference when it comes to saving space, I still have it and tried to have it playing the avi files, but it won't. (It's not altered in any way as far as I know and it's WMP 11)

When playing avi files I rarely use Winamp, my favorite is Irfanview.
I tried Winamp though, but I get the same result: sound, no visuals.

I downloaded Mjpegcodecv3.2.4 here: http://www.free-codecs.com/Motion_JPEG_Codec_download.htm

Greets,
Sarah

I started looking into IrfanView and it does have an option to use DirectShow filters for playback. It's in Options -> Properties -> Video/Sound tab -> 'Use DirectShow for playing' (v4.00+). I can now play my camera's MJPEG files in IrfanView.

However, after testing several other formats I can see that IrfanView is still not a capable media player. It's primary purpose is picture viewing, and it's great for that, but the video playback is secondary and not capable enough to be your primary media player. If you don't like WMP, and don't want Winamp as your primary, then I would recommend Media Player Classic (MPC). I think this was mentioned in the other thread, but I don't remember where it lead. There are many fans of VLC, because it has built-in codecs. The downside of this is that you can find media files that will play in VLC, but won't work in other apps under Windows and that can be confusing.

You did find a good site in http://www.free-codecs.com but I notice that Mjpegcodec 3.2.4 is shareware. And, if it's not working for you, try something else. If you are willing to try ffdshow-tryouts, I'll help you with any issues. It can be found on SourceForge:
http://ffdshow-tryout.sourceforge.net/

Ha ScottW,

If Window Media Player would actually dó something for me, it wouldn´t be useles on my computer and I would be glad to have it. So if it does play these avifiles for me I´m more than ok with it.

A friend uses Irfanview and I tried it, but it played my avi's perfectly. WMP played them also.

I have the option DirectShow in Irfanview enabled (checked his site first to find a solution).

And I'm downloading ffdshow-tryouts at this moment. (Is it free? Freeware rules! ;-D).

Greetings,
Sarah

Sarah, yes ffdshow-tryouts is freeware. Don't let the 'beta' label fool you. This is a much updated version of the original ffdshow (which hasn't been touched since 2002). As you can see from their webpage, ffdshow-tryouts has many bug fixes and is Vista compatible. All the videophiles I know use it and it is quite stable.

BTW, you should uninstall the Mjpeg Decoder, ideally before ffdshow-tryouts. But, if you do this backwards, that should be fine. Once installed, you can try using IrfanView, Winamp, or WMP to play your camera's MJPEG files. If you have any trouble, let me know.

I installed it, but it doesn't work. Restarted, but that didn't help either.
And I have PowerDVD and Powerdirector from Cyberlink installed (never use it, but took a look now) and that has a read me file for the license of their Mjpeg codec. So I guess that codec should be there and for one reason or another these codecs don't want to work.
And I get the impression it did work before, because I have an avi from my camera that I converted to flash - so I must have been able at one point to see these files.
I've been installing several apps lately (nothing to do with audio or video, but it makes it hard to figure out where things went wrong and going back to a restore point means I loose all the other changes I made), so my goose is cooked I think ....

Tomorrow is another day - goodnight for now.
Sarah.

I have been using ConvertHQ Premium to convert the videos from my digital cameras. I think it is Mjpeg and mono.. not sure.. but it works straight ahead with ConvertHQ.
I am sure there are other apps you can use too, -U

Sarah, don't cook that goose yet! We can fix this. Instead of going back to some old system restore, let's move forward to a solution.

First, just because you have installed an application which has certain video codecs in it, that DOES NOT mean that those codecs are available to Windows and all other applications that run. PowerDVD may be able to play your MJPEG video using built-in features that are only available to it. Actually, it would be an interesting experiment to see if PowerDVD can play them and if PowerDirector can load them. Neither these apps nor any others you have should be a problem for video playback.

So, here's what to do 'tomorrow' whenever you are ready to tackle this problem. Get the Codec Tweak Tool here:
http://www.free-codecs.com/Codec_Tweak_Tool_download.htm

Run it with the following options: Detect broken codecs, Detect broken DirectShow filters, and all Generate text file options enabled. Like this:

Click next and let it fix any broken codecs/filters if it can. If that doesn't do the trick, post the output text file to http://htg.pastebin.com and I'll take a look at it.

OK Scott - a bit hasty, you'll forgive me: downloaded and ran it. That gave me this:

I haven't 'fixed' it, because I hope to find the missing dll and just place it where it should be. Don't have a clue as to why it's not there anymore ....

There were some more messages, but as far as posting the textfile goes, that has to wait till later.

Thanks for taking the tim

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