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Unofficial VirtualDub Support Forums > Testing / Bug Reports > Virtualdub 1.7.8 Error With Ffdshow H.264 Lossless

Posted by: Blameless Mar 3 2008, 06:03 AM

Anytime I attempt to encode any video with ffdshow tryout's H.264 lossless codec I get this:

user posted image

I've used the latest stable ffdshow tryouts, as well as several of the nightly builds. I have tried at least a dozen different source videos; all produce the same error.

All of the other ffdshow codecs work fine, with the same files, including standard H.264.

I can distinctly remember using ffdshow tryout's H.264 lossless encoder successfully with VirtualDub in the past. However, I have not yet tried going back to an older version, I'd like to know if anyone else has encountered this situation before I do.

I'm at a loss here. Is the problem with VirtualDub, ffdshow, or something else entirely?

I would greatly appreciate any assistance anyone could provide.

Thank's in advance.

Posted by: heikon Apr 17 2008, 04:55 AM

I had the same problem, got -100 error, and I had no idea why, well, I guess thats why..

Read> http://forums.virtualdub.org/index.php?act=ST&f=4&t=14240&hl=

Posted by: sonical Apr 18 2008, 03:42 PM

Could You please write down what resolution are those videos and what input/output color format and conversion did You choose?

Also there could be a more detailed error log here, so we could see what did fail exactly. However if it's just a codec saying -100, there's something wrong with it probably. Also please verify if the mode is "full processing" not "normal or fast recompress" - i've one run into some strange problem when using ms-mpeg4 or something which did work fine only with "full" - but this was only once, and I couldn't reproduce such a situation.

Such an error could occur whenever codec fails to compress: due to invalid (non multiple of 4, 8 or 16) size video, or if the target bitrate is too small. No idea about the lossless one however. For lossless I allways use just RGB24 - as loss sometimes gets introduced by "visualy lossless" codecs at least by colour subsampling (for many of them!) and math roundoffs (especially "luxury sylish" wavelet ones)