Bug report: K-lie codec pack, x264vfw and VirtualDub

[spapakons]

Hello!

I recently installed Windows 11 on my computer. After a failed attempt to upgrade from 10 to 11, I did a clean installation and reinstalled all my applications, including K-lite codec pack, x264vfw and VirtualDub. When installing K-lite codec pack I used the default settings which use the LAV splitter. This somehow affected x264vfw codec and when trying to compress a video in VirtualDub did not process all frames and I got a much smaller file which of course didn't work well. The final file was calculated to fit a DVD and should be at least 4GB long, while the actual file was 700-800MB, and of course crap. After trying many settings, I decided to uninstall K-lite codecs and this time install carefully with custom settings. I changed everywhere to prefer ffdshow spitter instead of LAV splitter. I also reinstalled x264vfw because it is affected by K-lite codecs and fails to encode video. Reinstalling it restores functionality. This did the trick! Now VirtualDub processed all frames and the video was close to 4GB and as good as it gets for the set bitrate.

I hope that helps. I don't care is LAV splitter is better or something, I prefer backwards compatibility, so I prefer ffdshow splitter.

[LigH.de]

The x264vfw codec is pretty obsolete today. VirtualDub2 contains a native x264 codec to be more independent of the frail mesh of codecs installed in Windows. Combining it with the integrated ffmpeg AAC audio codec, you may better create your copy with the output file type "MP4 +faststart" for optimal future playback device compatibility, instead of the AVI container.

And ffdshow is obsolete too, superseded by the LAV Filters package. By the way, it cannot harm the x264vfw codec, as LAV filters are all only decoders, and x264vfw is only an encoder, they operate mutually distinct. There is no base to blame one for the other not working well in Windows 11. It may rather be Windows 11 starting to make the whole VfW codec technology obsolete. Microsoft will not guarantee eternal backwards compatibility. For your own good, update your workflow and goals...

[El Heggunte]

I changed everywhere to prefer ffdshow spitter instead of LAV splitter.

ffdshow is not a media splitter (read: demultiplexer). ffdshow is a set of ENcoders, decoders and filters.

You don't need K-Lite if the goal is to install only LAV Filters and Xvid.

[spapakons]

I have an HDMI to USB converter which I use to record some short videos from an external HDMI source. The problem is that the default recording format is 1920x1080 at 60fps. I need to convert that to 10920x1080 at 25fps (Greece). Yes, I know I can select 25fps from Capture Settings, but produces out of sync videos, so I capture at the default 60fps. I tried to convert 60fps to 25fps with Virtualdub 2 a couple of times, but for some reason it was not done properly, the video was choppy and the audio out of sync. So I revert to good old Virtualdub 1.10 to convert from 60fps to 25fps. This can only output as AVI, but I don't care since MultiAVCHD can accept AVI files and convert to AVCHD folder without recompressing, if the video is compressed to x264vfw (and compliant of course) and the audio to PCM or MPEG 2 or AC3. Regarding K-lite codecs, every time I upgrade these and then try to use x264vfw something goes wrong and I get an error. Reinstalling x264vfw fixes that. No, I don't want only LAV filters and I hate Xvid (I am a DivX fan), so I install the K-lite Codec Mega pack to have them all. Also I prefer Media Player Classic over VLC. Installing the codecs allows me to use most of these for ENCODING also, while VLC can only play everything but not encode.

[LigH.de]

A norm conversion between 60 (or 59.94?) and 25 fps is not trivial, there will surely be video artifacts, more or less annoying, depending on the method used. But it is surely possible in sync.

I would probably use AviSynth (others may prefer VapourSynth for the video part), which provides several methods, from simpler core functions like ChangeFPS to more elaborate Plugins with motion compensating algorithms like MFlowFPS. Audio may either pass through AviSynth (being decoded in parallel to the audio stream) or be demultiplexed to a separate audio file and then multiplexed back into the copy after the video conversion. No intermediate AVI required.

[spapakons]

Hello! It is exactly 60fps, not 59.94fps as the source is a computer. VirtualDub 1.10.4 does a really good conversion from 60fps to 25fps without any visible artifacts (such as stuttering), and most important, without losing sync with audio. I have downloaded every filter that exists for VirtualDub (they also work in VirtualDub 2 32-bit), so I can import almost any video format. If unsure, I select the DirectShow filter or the FFMPEG filter and the video imports without any issue. I prefer DirectShow because in some videos takes too much time to jump to a specific point if opened with FFMPEG making editing tedious. By the way if there is any setting I can change to make video seeking faster with FFMPEG, please let me know.