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3

DV has a something of a focus on simplicity, so it can be encoded with primitive microprocessors and decoded quickly in an NLE. In particular, it's intra-frame: a DV file is basically an array of still-image files. That's useful for professional editing; it means however DV can't achieve nearly as high compression ratios as more complicated formats with P- ...


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First we need a primer on I, P and B frames. An I frame is a frame that is a completely independant picture of the frame. It doesn't depend on any other frames and is a frame which B and P frames are based on. A P frame stores only the changes from the previous frame and a B frame stores only the changes in either direction. IPB uses a mix of all 3 frame ...


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Many different factors can contribute to stutter in video playback. It could be a CPU issue (check your CPU when playing the video) in which case, a simpler codec or a player that can leverage the graphics card for decoding would help. It could also be data rate related though. In this case, using a simpler format would actually compound the problem as ...


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http://www.openthefile.com/ext/mjp/4458 and http://www.fileinfo.com/extension/mjp both suggest mplayerx (http://mplayerx.org/) can play them. It would make sense to post a file for people to examine. If mplayer or ffmpeg can play them, chances are mencoder or ffmpeg can encode to the format.


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If compatibility is your top priority, then you should include two alternative versions of your video on your website, like in this HTML example. As for the exact formats I would suggest: H.264 and AAC in MP4: Chrome, Firefox 22+ on Windows, IE9, Safari 3.1 VP8 and Vorbis in WebM: Firefox fallback for Mac and older versions on Windows. (If you need ...


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Vantolinomo - You might just be experiencing 'gamma shift' which can happen when you are exporting to H264 video. You can find a tutorial to fix this here: http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/


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I'm going to repost a section of my answer from this question, as it seems generally relevant: YouTube (as well as Vimeo, and practically every other video website nowadays) works using the H.264 codec. Here are YouTube's instructions for how they'd like videos to be encoded for upload. The TL;DR version of that page: Container: ...


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This is just a result of the compression that Youtube chooses to apply. Your initial data rate for the video (3.5 megabits for an SD video) is exceptionally high and not really designed for streaming. Youtube probably sees that it is only an SD stream and then drops the bit-rate accordingly. It may not be possible to get better quality since Youtube's ...


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There's a table here showing support for the various video codecs by the four main browsers around today. For Chrome and Safari the only option that plays on both is h.264 in an mp4 container. I've found that main profile h264 video plays best across most modern devices, but you can wind it back to base profile if you're having problems. This is a good ...


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You can try using either of the two Motion JPEG codec's available with Quicktime and see if either of those works after renaming the extension. Motion JPEGs are kind of a major pain though because it's literally just a sequence of JPEG images for each frame within the video and the exact specifications of the container can vary. This can result in files ...


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Not sure on the AVI but kept searching and found http://sketchucation.com/forums/viewtopic.php?f=11&t=18827 What OS are you using? Vista 64 bit has codec issues, so if it is indeed a Vista 64 bit you need to export as a series of images (which is best anyway) and compile it in after effects. I'm on Windows 7 so don't know why it was an issue ...


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I don't think you will find a single clear tutorial as you are talking about a very very broad field and talking about multiple aspects of it. Many, many, many tutorials exist for help with encoding for YouTube or encoding for Bluray. In fact, most Bluray authoring software has pretty good walkthroughs in their help. Youtube itself outlines the basics for ...


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When video or audio data is compressed, it works by two different mechanisms. The first (which is the only one used by lossless compression) is to look for patterns that are repeated. When patterns are found, it can store the data once and reference the stored copy. The second is only used lossy compression and involves discarding the least significant ...


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While it can't go direct to H.264, VirtualDub I believe can work with Vfw codecs and can transcode to something more compatible with your other tools. I don't know if Quicktime for Windows supports Vfw codecs or not, but I do believe the Pro version of Quicktime supports H.264 encoding. If you have Adobe Media Encoder, it would also easily do what you ...


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First off, codec packs are often more problem than they are worth. They tend to cause conflicts as much or more than resolve them. You are far better off targeting the particular codec that is needed. If you look at the information about the clip, it should indicate the codec that is used within the MOV and you should then be able to get that particular ...


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For archiving VHS I suggest using MPEG2 720x576 as the best format in terms of quality/space. DV is 12 GB per hour, but this is the best format for editing. H264 takes up much less space, but it is the delivery format, not for editing. MPEG2 is a compromise. In addition, you can burn them to DVD w/o reconverting.


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It can depend on the compression used, but generally yes, there will be a loss of quality, particularly if there is any alteration to the video. For a fairly low compression format like DV it probably isn't going to be much, but the best bet, if the format supports it, is to append the stream data and alter the file such that it has the necessary format or ...


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Try applying a de-interlace and make sure that the preview window is at full quality. If you play back interlaced footage as progressive without deinterlacing, then every other frame only has half the normal information which would look pretty bad. You should be able to adjust it under Interpret Footage from the footage properties.



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