Output formats

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Выходные форматы:

Вы закончили анимационный проект. Было тяжело, но вы преодолели все препятствия на своём пути и готовы отрендерить свой шедевр. Единственной проблемой останется выбор выходного формата и кодеков из множества вариантов. И как добавить звуковую дорожку? Рендерить отдельные изображения и сразу видео?

Не знаю, как вы, но честно, лично для меня эта часть анимации самая ужасная. Всё время появляются новые кодеки, и каким-то образом мне надо иметь каждый из них на компьютере. Я понятия не имею, какой лучший. Какие-то больше подходят для DVD, другие для онлайн-видео, о каких-то я вообще мало что знаю, и все они обладают разной степенью сжатия, разными правилами, преимуществами и недостатками. Я пробовал (или пытался пробовать) почти все из них для получения разных результатов.

Then the ability to actually output sound with my animations added a whole new wrinkle to an already sticky issue. Recently, while attempting to finish up a very simple project, I ran across a great page in the Blender wiki (amazing how much info is hidden in plain sight in that wiki), that answered most if not all of my output questions. And it is ironically enough titled Output Formats. Go figure!

Я не буду изобретать велосипед или копировать всю страницу сюда but I am going to tell you that it explains the Format Panel, the available presets and available options. It even defines all those file formats as well as compression, codecs and the FFMPEG Video and Audio. But the best part of all, (and I am going to just copy this part, because I think it is definitely worth copying) is the Free advice section of the page. It gives you a clear path through the codec confusion, and for the greater part of it, is just what we need. So, here it is.

From the BlenderWiki:

Free Advice

Choosing which format to use depends on what you are going to do with the image.

  • If you are going to email it to your friends, use JPG
  • Combine it with other images in post processing and simple color/alpha composition, use PNG use nodes to simulate depth of field and blurring, use EXR
  • Composite using Render Passes, such as the Vector pass, use Multilayer.

If you are animating a movie and are not going to do any post-processing or special effects on it, use either AVI-JPEG or AVI Codec and choose the XviD open codec. If you want to output your movie with sound that you have loaded into the VSE, use FFMPEG.

If you are going to do post-processing on your movie, it is best to use a frame set rendered as PNG images; if you only want one file, then choose AVI Raw. While AVI Raw is huge, it preserves the exactquality of output for the post-processing.

After post-processing (compositing and/or sequencing), you can compress it down. You don't want to post-process a compressed file, because the compression artifacts might throw off what you are trying to accomplish with the post-processing.

Note that rendering a long animation to calculate in a unique file (AVI or QuickTime) is more risky than in a set of static images: if a problem occurs while rendering, you have to re-render all from the beginning, while with static images, you can restart the rendering from the place (the frame) where the problem occurred!

One other note, while not a format problem per say, caused me no end of headaches until I saw the FFMPEG Audio section. Adding audio is now possible, but remember to Click the Multiplex Audio button or you will not get sound, not matter what codec combination you try.

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