getting artifacts after encoding in VirtualDubMod

[gtx780]

Hi, i just tried to encode a movie in VirtualDubMod (1080p mkv to avi), i used Single pass method. Everything went fine until i played the video and saw that it has artifacts during playback.

Here an example of artifacts: (on top of the pictures)



Does anyone know what causes it? Thanks in advance

[hech54]

Not enough bitrate or the source is crap....what else could it be?

[gtx780]

The source isnt crap, i tried to encode with Megui (used the same source) and it doesnt have artifacts.

The bitrate of the encoded video has 1460 Kbps (with megui i got approx the same)

[hello_hello]

It looks like a decoding problem to me. What's MeGUI using for decoding? Probably ffms or L-Smash. Whatever though..... if it's decoding fine using MeGUI, you could always open the script MeGUI creates for encoding with VirtualDubMod and encode the script instead. You'd need to re-encode the audio (if need be) and add it to the output AVI yourself.

VirtualDubMod's MKV support is very old. I don't know how you're opening the video with it but you might be better off using VirtualDub instead, along with the ffmpeg input driver plugin (link on the VideoHelp VirtualDub page), which well let VirtualDub open all the common types of video. It'll also do the decoding, and should be pretty reliable. Just pick "ffmpeg supported files" in the "file type" dropdown box when opening a video to ensure the ffmpeg input driver plugin is used to open it.

Or why not just use MeGUI?

[gtx780]

It looks like a decoding problem to me. What's MeGUI using for decoding? Probably ffms or L-Smash. Whatever though..... if it's decoding fine using MeGUI, you could always open the script MeGUI creates for encoding with VirtualDubMod and encode the script instead. You'd need to re-encode the audio (if need be) and add it to the output AVI yourself.

Yes thats exactlay what i did, i created AVS script with Megui (because VirtualDubMod cant open the file) and opened it with VirtualDubMod.

VirtualDubMod's MKV support is very old. I don't know how you're opening the video with it but you might be better off using VirtualDub instead, along with the ffmpeg input driver plugin (link on the VideoHelp VirtualDub page), which well let VirtualDub open all the common types of video. It'll also do the decoding, and should be pretty reliable. Just pick "ffmpeg supported files" in the "file type" dropdown box when opening a video to ensure the ffmpeg input driver plugin is used to open it.

EDIT: tried VDub but its the same

Or why not just use MeGUI?

Because i like the way how VirtualDubMod works, and its good when i just want to encode the video and then add the audio track.

[hello_hello]

You still didn't specify how MeGUI was opening the video in the script, so maybe we should put a pin in that one, and you said VirtualDub produces the same result, but not whether that's opening the script or using the ffmpeg input driver to open the video, so maybe we should come back to that, and I'm not sure which encoder is being used, but I could take a guess if it's not a decoding issue that maybe it's an encoding one. Or a Video For Windows problem given VirtualDubMod uses VFW codecs and MeGUI doesn't, although if it is, it's not something I've seen before. You could try a different version of whatever encoder you're using with VirtualDub. I assume you've tried to play the encoded video with more than one player?

There'd be nothing stopping you from encoding the video with MeGUI, then adding the audio track with VirtualDubMod. Or if you use the AutoEncode method, you can add existing audio to the job and MNeGUI will mux it into an output file for you when it's done encoding the video. Although the VirtualDubMod method should work fine.