![]() This may help you with storage while you edit but won’t lead to the best quality compressed file possible.Īlso, since the efficiency of your NLE depends more on codec type than on file size, shooting in compressed formats won’t necessarily help you edit faster either. If, however, you shoot in a compressed format in the first place (i.e., in-camera), you are lowering your video’s potential quality straight out the bat. This, in turn, quickens upload speeds without noticeable sacrifice. So the goal of compression is to manage the size of your final video while preserving quality. Shoot footage at the highest possible codec and container So before going through your own compression workflow, there are a few tips to keep in mind to help to guarantee the best results. ![]() This is something you can learn more about in our article on frame rates, but its relationship to compression is elaborated further below. They are not always going to be the same. Project frame rate: The frame rate you edit, export and exhibit your video in.Recorded frame rate – the frame rate you shoot your footage in.Frame rate refers to the number of still images captured or presented per second of video. Frame Rateįrame rate is probably a familiar concept to you, but it’s important to consider it in the context of compression. ![]() However, this also has a significant impact on quality, which you will read more about shortly. As you might expect, video bitrate significantly impacts file size as it determines the amount of information contained within the whole video. Bitrate refers to the amount of data within each second of video, normally measured in megabytes per second (Mbps). When talking about compression, it’s vital to understand the role of bitrate. Some popular codec examples include H.264, ProRes 422, ProRes 422 HQ, while popular containers include MP4, MOV and AVI. At the same time, the container is basically a wrapper (you can think of it like an envelope) that the final video is presented in. A codec (coming from merging the words coder and decoder) is a piece of software that enables the conversion of files. The 2 components you are adjusting in the encoding process are codecs and containers. Some important terminologyīefore jumping into the technical explanations, we should first establish some important terminology that will help make sense of them: Encoding (codecs & containers)Įncoding is the name given to the process of changing a file from one format into another (compression involves encoding to reduce the video’s file size). We call this process “compression.” In this article, you’ll learn what it is, some tips to keep in mind when doing it, and the compression workflows to follow across most major NLEs and transcoders. So you’ll be pleased to learn that you can significantly reduce the size of your video file, and therefore upload time, without losing any noticeable quality in the video. Or maybe your NLE’s default export option left you with huge file size, and you’re unsure why. Whether to an audience, client, director or crew member, you might be hoping to present the very “best” version of your video file. ![]() Since your iPhone files are already highly compressed, my personal recommendation in your case would really be to move up to higher density optical media (e.g., DVD) or break down and spend the $10-$20 it would take to upgrade to a 16 GB or 32 GB drive.When your edit is finally complete and you’re ready to share your work online, the last thing you want is to wait hours just to upload. In most cases the basic strategy is to use a high effeciency codec export option that allows the user to manually modify the export settings to produce the most compact file with a level of quality that the user "can live with." How low you can go will usually depend on the preferences of the specific user. In general, decreasing the data rate will drecrease quality unless you also decrease the dimensions of the targeted encoding matrix and/or otherwise modify the distribution of data per unit of time. However, there is a limit to your ability to decrease the data rates and still produce useable output. The basic answer here is that any converter app that exports the audio + video data to a lower combined total data rate will produce a small file. Is it possible to compress in iMovie (and if so, how), or will I need freeware to do it? Or is it even possible at all?
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