Tuesday, 22 November 2011

Sorted out my keyframing issue in After Effects - I've realised now that every variable that is going to be affected by the animation has to be keyframed. After doing this, we have motion!

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So this is what I've been working on pretty much solidly for the past couple of weeks...pleased to say that the Dorset Business Awards have been delivered!

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Monday, 21 November 2011

Unit 28.2 - Issues with the Preparation and Manipulation of Assets

Photos!

Larger image dimensions don't always mean larger file sizes. It's the combination of the depth of colour, the resolution and the dimensions that makes something big or small disk space wise. Normally you can choose to work with colour swatches like these...

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...which are a small selection of basic colours...

...web colours like these...

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...which are the full colour spectrum

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simplified a bit.

The greater the depth of the colours that you use, the larger your finished file will be.

So a picture created using colour swatches will be smaller than this...

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...which is smaller than this.

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The dimensions and the resolution are exactly the same, but the first picture's 586kb in size, the second's 594, and the third's 631.
For the record, it really is quite difficult to sing the rainbow song backwards, the tune doesn't go at all.

The higher the resolution of an image is, the more pixels there are making it up. A lot of mobile phone cameras still produce low resolution images, which is why when you try to view them on a computer the picture's often small, and pixellates when you blow it up.

Sound!

The audio sampling rate is the number of samples per second that are used to digitise a particular sound. Most digital video cameras can record at a number of different audio sampling rates, with the highest rates producing the best results (and the biggest files).

Bit rate can describe the quality of an audio or video file. An MP3 compressed at 192kbps will have a better range and sound clearer than the same track compressed to 128kbps. This is because more bits are used to represent the data during each second of playback. Just like the quality of an image is measured in resolution, the quality of an audio track is measured by bit rate.

Video!

As with images, the larger the dimensions of a film's frames, the more disk space it will occupy. And the same as audio, the higher the frame rate you run the film at, the smoother the film will run. When you run a film at 24 frames per second, the actions are smooth and reflect real life. When you run it at 10fps, the movements are jerky and you can see when the frames change and it doesn't look realistic. This is especially noticeable when you're animating - the ideal is at least 24 individual images for every second of video you want to produce.

And obviously the bigger the files you need to transfer, the longer it'll take...the little green men in your computer have to shout out more ones and zeros per file, and they get a bit hoarse, bless them.

Thursday, 10 November 2011

Preparing Assets - Unit 28.1

Ok...so this is me setting up a Final Cut Pro project...

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Because this film will eventually be screened at an awards ceremony, the quality needs to be as high as possible, so as you can see I've used settings appropriate to high definition video when creating the project.
It doesn't always work like that though...if you are trying to use lower quality video footage in a sequence that is set up for HD, the quality of the finished product will be terrible because the original footage will stretch to fit the sequence settings and pixellate or distort.

How you set up your project will depend entirely on what program you're using and where the finished article is being shown.
I made the mistake of using Final Cut to make edit and export a series of 30-45 minute films at the high quality they were captured at. This took far too long to render and export, and as they were only meant to be shown on the web, the file size was much too big and the quality unnecessarily high, so they'd take too long to stream.

It's a really good program, and will take pretty much any audio, video and photo format. The quickest ones to work with are those that are compatible with my OS without conversion - .mov, .jpeg, .aiff, .avi etc. Windows files like WMVs and WMAs work too, but the disadvantage is that the rendering process is much slower because the software's basically having to convert it for you every time you need to watch something back.

If you're working to the specification of a client, the first thing you really need to know about the film is how and where it will be shown or distributed; of course this won't change the way the film's edited or the quality of the work, just the quality of the final export. It's possible to compress high quality video and large images down, but not to scale poorer quality footage or photos up, so this has to be taken into consideration from the start of the project. I find it's usually best to work with the original footage in a good quality format and get one master best quality export. You'd then go back to the project and export in a lower resolution (for instance if the film was intended for web). Especially if a client is reviewing your work, they will want to see a high quality film, despite knowing that it will not necessarily stay at that resolution when it is broadcast.

Tuesday, 8 November 2011

And this is Neville taking his first tentative steps into showbusiness...

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He's not normally that grumpy, but he's just been rudely awoken.

Monday, 7 November 2011

This is Neville.

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He's going to be in my film (:
Have been working on the Dorset Business Awards films this week - 30 films, 30 seconds each (ish). The edits were pretty straightforward but I found it quite hard to condense the information that the interviewees gave (at least fifteen minutes per film) into such a short space of time. We've also been trying to rearrange the office around building work for an advertising agency that are coming in...there are bookcases and inflatable cars and mugs all over the place...