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| f0bay |
 Posted: Mar 25 2014, 07:51 PM |
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Newbie
Group: Members
Posts: 1
Member No.: 37820
Joined: 25-March 14
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Hi
So I am using VDub to trim avi files down to 30 sec-1 min clips. When I save the file as avi and then go to play the clips in VLC or windows media player they playback fuzzy and in black and white?
Am I doing something wrong, is this a codec problem? If so any idea how to fix it? |
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| Abrazo |
| Posted: Mar 25 2014, 08:13 PM |
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Advanced Member
Group: Members
Posts: 775
Member No.: 28995
Joined: 5-November 10
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If it goes about AVI-files and you can open and play them without problem in VirtualDub, then it must be possible to do Direct Stream Copy.
This means that you can select "Direct stream copy" in the Video- and in the Audio-menu of VirtualDub. So, no re-compression will be needed.
You only have to take care that when you indicate a piece of video that needs to be cut out of the original (by using the Mark In and Mark Out buttons), that you end your selection to just before a 'Key frame' (indicated with a "K").
When you then do a "File > Save as AVI..." to a new AVI-file, it should just play without problem in Windows Media Player and VLC.
(Probably your problem has come after recompression in VirtualDub. In that case you should check which codec is being used and if the dimension of the frames is accepted by that codec - width x height in a number of pixels - at preference always use multiples of 4)
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| -vdub- |
| Posted: Mar 26 2014, 10:31 AM |
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Advanced Member
Group: Members
Posts: 613
Member No.: 27087
Joined: 24-February 10
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I agree always 4 until you are sure what the multiples for the source video actually Virtualdub ATM doesn't tell us this information
If know can use 8, 16 or higher than 4 the destination file size can also be less than if use multiples of 4
A question remains what tool can give the information correctly not Virtualdub or Mediainfo. If a tool exists that worked for a lot of video formats in different containers that would be a help many people
Unwanted things can happen to the destination encoded video when the multiples setting is wrongly set for the video. When in doubt set it to 4 then video will normally encode correctly for multiples
Maybe possible to get Virtualdub to help with this (unknown if this is correct) when using Video Filters - Virtualdub Resize to set the multiples values.
When set Multiples of 16 and exit the Resize filter back on the Video Filters window shows it isn't the size you have set.
704x396 is a true 16:9 aspect (it's listed and used with SD DVD video discs)
1920x1080 is a true 16:9 aspect (it's listed and used for HD BR Video discs)
Below test are using progressive 25 fps video (not that it makes a difference to tests below). Test used a selected 10 second small clip from video tested. To encode to see the results, encoder used x264vfw full compression, audio direct copy
Test 01 Reduce the video resolution
Source 1280x720p (16:9) video
Resize Set to 704x396
Same as source
Multiples of 16 and 8 (doesn't show the correct resolution and didn't encoded to the correct resolution
Multiples of 4 Does show the correct resolution and encoded to the correct resolution
Test 02 Increase the video resolution
Source 1280x720p (16:9) video
Resize Set to 1920x1080p
Aspect Set to Same as source
Multiples of 16 doesn't show the correct resolution and didn't encoded to the correct resolution
Multiples of 8 and 4 Does show the correct resolution and encoded to the correct resolution
1. Anyone know of a tool that can show what multiples which were used when a video was encoded. Or what multiples a video has if can be parsed
2. Anyone know of a site that has in depth detail for multiples settings greater than 16 to use or not to use. Or to use instead of 16x16 a custom setting 16x64 or other for what to use and what not to use and when to etc |
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| raffriff42 |
| Posted: Mar 26 2014, 07:05 PM |
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Advanced Member
Group: Members
Posts: 384
Member No.: 35081
Joined: 25-June 12
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f0bay, you can get more specific help if you post MediaInfo reports: - download MediaInfo here
- run the program
- drag and drop your file
- select View=Text
- right click, Select all
- right click, Copy
- paste your report
- "X" out any personal info, such as your real name embedded in a file path.
- using CODE tags helps readability: [code]your report[/code]
This post has been edited by raffriff42 on Jul 26 2014, 06:19 PM |
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