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| Unofficial VirtualDub Support Forums > Newbie Questions > 0.0 Fps Processing |
| Posted by: Trekstuff Sep 19 2002, 05:08 PM |
| I am having problems encoding a 12Gb capture (Windows XP Pro, NTFS). Resized to 512x384 at 950Kbps of DivX 5.02, VirtualDub 1.4.10 would encode for several minutes and then FPS would drop to 0.0 and nothing else is going on. Strange thing is, when encoding the same file resized to 384x288 at 200Kbps, everything is fine and VirtualDub produces output file with no problems. Any help? |
| Posted by: fccHandler Sep 19 2002, 05:31 PM |
| Sounds like some internal limitation has been reached, either in VirtualDub or DivX. You could try encoding the video in parts, and then append the parts together (make sure you append on key frames). |
| Posted by: Trekstuff Sep 20 2002, 01:16 PM |
| Nope, didn't help, I tried to split the encoding into 3 parts and encode each part separatly - same problem, 0.0 fps after several minutes of encoding. This is weird, why then encoding at lower bitrate and lower frame size works perfectly? Also, searching Google I found something like "VirtualDub stops at 0.0 fps during processing while reading a large amount of data from disk" with the link to the VirtualDub.org KB, but the link is no longer active. Looks like someone has experienced this problem before, but I can't find any answer. Any help is greatly appreciated. |
| Posted by: jdg Sep 20 2002, 05:01 PM |
| Might not be helpful as it is for a previous version of vdub, but you can try reading that from the google cache : -------------- PRB: Very long pause in VirtualDub audio processing with cuts 1.4.5 (12903) Status:partial: 1.4.6 Symptoms: VirtualDub stops at 0.0 fps during processing while reading a large amount of data from disk. Cause: Some of VirtualDub's audio filters don't support seeking, including the volume, conversion, and resampling filters. When these filters are present in the chain, VirtualDub reads all of the audio from disk and discards the unused segments. This only occurs if you have the features enabled and if you made cuts to the file (Select Range won't do it). This is only a performance issue. Workaround: Do your cuts to a temporary AVI file and process that. Fix status: Partially fixed in V1.4.6. Volume and conversion filters now support skip but resampler still forces full read. |
| Posted by: fccHandler Sep 20 2002, 05:30 PM |
Excellent work, jdg  It doesn't really sound like the same problem, but if the audio filters are still buggy in 1.4.10, try setting Audio to "No audio" and encode the video by itself. If that works, then you can just rip the audio out of the 384 x 288 version (assuming you kept it) and remux. |
| Posted by: Cled Sep 20 2002, 11:36 PM |
| I get this same problem when I encode any type of video while using the MP3 audio codec. Try using a different audio codec like Divx Audio or Mpeg-3 |
| Posted by: fccHandler Sep 21 2002, 03:56 AM |
| ATTN: Cled Not only is the DivX ;-) Audio codec a piece of crap, it's illegal and we're not supposed to discuss illegal codecs here. I'm not sure what is meant by "Mpeg-3," but if you mean MPEG Layer III or MP3, that's also illegal unless you have purchased it or obtained a license to use it. Thanks for trying to help, but remember we want to offer legal solutions.  |
| Posted by: Trekstuff Sep 21 2002, 04:44 AM |
| Thanks everybody for the replies, it's working now! The problem *was* with audio. As soon as I switched to the LAME MP3 codec - which is a legal open source codec, Virtual Dub stopped stuttering and encoding continued successfully. |
| Posted by: fccHandler Sep 21 2002, 05:29 AM |
Technically, the LAME source code is free and legal, but an ACM codec compiled from LAME isn't.  Still, I'm glad that we could help you solve your problem! |