[MEncoder-users] mencoder //tv capture avi index problem

[The Wanderer]

On 06/24/2011 09:38 AM, ted morris wrote:

> greetings,
> 
> I'm using mencoder to capture live  /dev/video[x] streams tv:// with
> v4l2 and saving them as ffmpeg mpeg4, single pass files, no audio.
> 
> They playback fine with the media player in Debian linux, and VLC in
> windows ok.
> 
> But I want to use VirtualDub and with any version I try I get this
> warjning:
> 
> AVI:Index not found or damaged -- reconstructing via file scan.
> AVI:keyframe flag reconstruction was not specified in option options
> and the video stream is not a sknown keyframe-only type. Seeking in
> the video stream may be extremely slow.

Something that just occurred to me:

How big are these files?

If memory serves (which it may not, it's been a while), AVI files over a
certain size don't necessarily work with the ordinary index. ODML is
meant to circumvent that limitation (among other things), but it can
sometimes cause issues if an ODML index gets created when one isn't
needed. If an ODML index is being created in this case, and if
VirtualDub doesn't support ODML, then that could explain the problem.

If the AVI files you're creating are smaller than the 2GB limit, try
adding '-noodml' to your command line and see if that changes anything.

-- 
       The Wanderer

Warning: Simply because I argue an issue does not mean I agree with any
side of it.

Secrecy is the beginning of tyranny.