i 'm using WLMM just to add my intro to it.
Now Youtube has cut videos short in the past...http://mewiki.project357.com/wiki/X264_Settings#crf
While qp targets a certain quantizer, and bitrate targets a certain filesize, crf targets a certain 'quality'. The idea is for crf n to give the same perceptual quality as qp n, just in a smaller space. The arbitrary unit of measure for crf values is the "ratefactor".
CRF achieves this by reducing the quality of 'less important' frames. In this context, 'less important' means frames in complex or high-motion scenes, where quality is either more expensive (in terms of bits) or less visible, will have their quantizer increased. The bits saved in frames like these are redistributed to frames where they will be more effective.
Yes it plays fine all 60 mins. I have made multiple videos over 60 mins before. Filesize is usually less than 6GB so that is not a problem. I only ran into this problem using the append function. I have encoded it multiple times now still same issue appears. I am uploading the two separate segments individually now to see if they will work. I will try the mp4 container to see if it works. Thanks for the reply.Hi Van, you say "tried" to append the video. If the append failed, you should have gotten an immediate error message, so the append should be OK.
When you play the completed video, is the length showing as 60 min? Does it play all right in a media player, at the beginning, middle and end? Is audio in sync at the end?
BTW "QCP" (constant quantizer) mode is somewhat less space-efficient than "CRF" (constant ratefactor). Not that it matters too much - unless the loss of compression pushes your file over your upload limit?
Now Youtube has cut videos short in the past...
Only partial video being uploaded (Jun-2009)My video was cut short after uploading (Jul-2009)...and in these cases, the problem was the AVI format. I have never had a problem with using the AVI format, but then I haven't made any 60 min videos. You could try encoding to .MP4 instead, using another program such as StaxRip, I guess. I don't have a good answer for you, sorry
Supported Youtube formats
Encoding Video For YouTube: Advanced Specifications
Might want to check out this page: http://www.donsalva.com/2011/07/03/how-to-use-mkv-mp4-flv-mov-and-other-file-formats-with-virtualdubLooks like I am going to start using MeGUI and AVIsynth from now. Wish Virtualdub had the ability to work with mp4 etc.
"path\to\ffmpeg.exe" -i "path\to\output.avi" -acodec copy -vcodec copy "path\to\output.mp4"
UPDATE 18-Jan-2013:There's probably a way to save direct to MP4 with VirtualDub's Options, External Encoders, but at this point it's really, really difficult to use.
Hi huwa, it sounds like it's an issue with Virtualdub batch job list maker (or VDBJ for short )Hi raffriff, ...I'm currently doing a study and need to slightly modify a group of 20 video clips with several different filters and so I'm using Virtual Dub for this. Till now ok. Due to the various modifications I'm using the batch processing feature through 'Virtualdub Batch job list creator 0.2'
so far so good, however after I set up the batch job I'm noticing that the duration of all the clips is changing to that of the template job and I need that each clip retains it's original length.
Any help is appreciated.