![]() ![]() If the quality of an existing source is already poor, increasing these values will not enhance it.Ĭhanging these settings is the most efficient way to compress a high-quality stream into a smaller file. The most straightforward method is to set a preset video size:įfmpeg -i input.mp4 -c:a copy -s hd720 output.mp4įrame rate and bitrate adjustments are two simple yet efficient methods for changing media quality. You can also use FFmpeg to change the dimensions of your video. ![]() The command below creates a new Matroska with the audio stream copied over and the video stream’s frame rate forced to 30 frames per second, instead of using the frame rate from the input ( -r 30).įfmpeg -i input.mp4 -c:a copy -c:v vp9 -r 30 output.mp4 For example, the below query will copy the audio ( -c:a copy) from input.mp4 and convert the video to a VP9 codec ( -c:v vp9) with a bit rate of 1M/s ( -b:v), all bundled up in a Matroska container ( output.mp4).įfmpeg -i input.mp4 -c:a copy -c:v vp9 -b:v 1M output.mp4Īnother technique to improve video quality is to use the -r option to change the frame rate. ![]() It’s sometimes difficult to predict what will happen without putting something to the test. In other situations, it may only affect the file size. Changing bitrates can sometimes make a significant impact on subjective quality. ![]() The ability of humans to see and hear isn’t as simple and straightforward as we’d like to believe. The most straightforward technique is to alter the bitrate, with -b flag, which may or may not result in a difference in quality. There are a few techniques that influence the quality of a video when it is compressed to a lower size. Before we dive into the tutorial steps, let's understand how FFmpeg works in general. ![]()
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