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The 1080 and 720 in 1080p and 720p stand for vertical screen resolution, or height, in pixels. The more pixels there are in an image, the clearer it will be. As such, a screen resolution of 1920x1080 (two million pixels when multiplied) should appear twice as sharp as a resolution of 1280x720 (fewer than one million pixels). Meanwhile, the p in 1080p and 720p stands for progressive scanning, which updates full frame images more quickly than traditionally interlaced content.
HD DVDs contain 720p content and sometimes 1080p, while all Blu-ray discs contain 1080p content. Regular DVD quality can vary considerably, with some displaying content at a resolution lower than 720p, such as 480p. Moreover, there are still DVD players around that only carry support for up to 480p or 480i, meaning a viewer cannot get the full experience of any high-definition DVD they insert into the player.
Netflix typically streams at 720p, but with the release and expansion of what it calls "Super HD," users are able to stream more and more content at 1080p quality with a high-speed internet connection. Apple TV allows users to choose between 720p and 1080p streaming. DirecTV displays a "1080pHD" logo on 1080p pay-per-view content, and all their latest DirecTV Cinema content is in 1080p. On YouTube and Vimeo, high quality videos often allow for 720p or even 1080p streaming.
Screen resolution can be especially important in video gaming. Because there are more pixels in 1080p, less anti-aliasing is required for a smooth visual experience. This means that 1080p will not only likely look better than 720p, but will lead to a better gaming experience overall, as anti-aliasing can slow down a console or computer.
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These commands will ensure you download the highest quality mp4 video and m4a audio from the video as a single file or will merge them back into a single mp4 (using ffmpeg in my case). If ffmpeg or avconv is not available, youtube-dl should fall back to the single file -f best option instead of the default.
notice that youtube-dl has labeled the last option 1280x720 as the 'best' quality and that's what it will download by default, but that the line starting with 137 is actually higher quality 1920x1080. Youtube has separated the video and audio streams for the lines labeled DASH so we also need to pick the highest quality audio which in this case is the line starting with 141. Then we run youtube-dl again this time specifying the audio and video:
and it will download the 1080p video and auto-merge it with the highest-quality audio. It should also auto-deleted the separate downloaded parts. This method is a little extra work, but will get you the best results.
This answer here, with the most votes, should be right to give you the best video quality available, but....it's not always. bestvideo+bestaudio seems to choose only the best video and best audio of the options that are video only and audio only, then it merges the two together. Note that this also appears to be identical to the default behavior of youtube-dl. However, on the video I was looking at, the best quality was a single, pre-merged file that was already in a format with combined video and audio. The bestvideo+bestaudio option did NOT choose this best quality 720p file because it was looking only for separate video and audio files. Details below.
Here's some screenshots from a tutorial video I was watching showing electronic circuit diagrams in the video. Notice how the latter one is much higher quality and more legible (click on each image and compare the tiny font in a zoomed-in view):
Some video sites, such as youtube, offer not only different resolutions of video to download, but have options in youtube-dl called formats to download video and audio separately. For the case of youtube, it will only offer the highest quality video and highest quality audio separately. Here's an example output of using -F flag to show all formats available:
So there's a lot of different formats, but some are labelled "audio only" or "video only". If I selected to download one of those formats by using the specified format code such as with -f 137, I would really get either an audio file or a video file with no audio, which is usually not what you want. If I had ffmpeg installed and specified both video and audio formats with -f 137+140, then youtube-dl would download video and audio and afterwards combine them together into one video file.
If you don't have ffmpeg installed, youtube-dl will by default select the highest quality format that has both audio and video. This maxes out at 720p (and is usually specified by format code 22 so you would download with -f 22). If you do have ffmpeg installed, youtube-dl will be able download the real best quality video (1080p or better if available) and best quality audio, and after downloading mux (combine) them together into one video file so this is what I recommend.
I am a disk saver, so I download videos of the format 1280 x 720, because 4k videos takes more size of my hard disk.So I add youtube-dl in ~/.bashrc file like given below
Experiment -Open terminal and type yt =puPUJlV1-W4It will start downloading video with the best quality.Explanation -Bash allows us to define aliases which act like shortcuts to bash commandsin our case we define alias as -alias yt='youtube-dl -if best'where yt is the shortcut command for 'youtube-dl' which gives relief our fingers to type long command.You can write anything at the place of yt.I set a flag -i in youtube-dl -if best which means
First, download the program from our website. Run the downloaded file and install the software following the on-screen instructions. Movavi Video Converter is fully compatible with Windows and OS X and supports the latest video processing technologies, so you can enjoy fast video conversion on the latest Microsoft OS and Mac OS. After the installation is complete, run the Movavi video resolution changer.
To upload your file, click Add Media and then choose Add Video in the upper-left corner of the program interface. In the new window, choose one or more video files to convert. If you want to add a DVD video, click Add DVD > Open DVD and choose your DVD.
To review the list of available formats, open the Video tab and choose the video format you want: AVI, MP4, FLV, MOV, WMV, and many more. You can either choose a preset with a predefined resolution, for example, MP4 H.264 - HD 720p or specify a different resolution later on.
If you want to prepare the video for watching on an iPhone, iPod, iPad, PSP, or another portable device, click Devices and choose the appropriate preset for your device. Your video will be converted at the optimal resolution for viewing on that mobile device.
To change the video size, click the cogwheel icon below the presets ribbon. Locate the Frame size drop-down list. Here, you can either choose one of the standard resolutions or select Custom and specify your desired resolution in the Width and Height boxes on the right. You may also want to choose a resize method from the drop-down list to optimally fit your video into the selected dimensions. Click OK to apply the changes.
Click the blue Convert File Now button. Select the file format you want to convert your video to and click the blue button. Drag and drop your video file or click + Select Files to browse for your video. Then click Next.
Confirm your output format and click Next. Choose your video quality (e.g., 720p or 480p) and click Next. Make any changes to the advanced options that you want and click Next.
Finally, click the Start conversion button to change the resolution of your clip. Your file will be downloaded automatically after the process is finished. To upload your edited video to the cloud storage or download it as ZIP, click the corresponding buttons.
To upload the video to the online service, click the Choose Files button and locate your video file. To add a video from Google Drive or Dropbox, click the downward arrow button next to the Choose Files.
Click the cogwheel icon to open the Advanced Options pop-up window. You can change the video screen size and aspect ratio. To select the video resolution, open the Video Screen Size drop-down list and choose the desired option. For example, to convert 720p to 1080p, select the 1920 × 1080p (1080p). If you want to set a custom resolution, select Custom from the list and type width and height in pixels.
To upload your video, hit the Open file button, locate your file and click Open. Alternatively, you can add your file from cloud storage, like Google Drive or Dropbox, or by URL.
First, you need to choose the format for your video. To do this, simply click the button with the appropriate format. Next, open the Resolution drop-down list and select the video resolution. Besides all the popular video resolutions, the service also offers resolutions for DVDs, TVs, and mobile devices. If you also want to specify the video and audio codecs or change the output file size, click the Settings button next to the Resolution list. 2b1af7f3a8