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  2. Ethernet frame - Wikipedia

    en.wikipedia.org/wiki/Ethernet_frame

    It is immediately followed by the Ethernet frame, which starts with the destination MAC address. [ 1] In computer networking, an Ethernet frame is a data link layer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a data unit on an Ethernet link transports an Ethernet frame as its payload.

  3. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    Aspect ratio (image) The aspect ratio of an image is the ratio of its width to its height. It is expressed as two numbers separated by a colon, width:height. Common aspect ratios are 1.85:1 and 2.40:1 in cinematography, 4:3 and 16:9 in television, and 3:2 in still photography .

  4. Video compression picture types - Wikipedia

    en.wikipedia.org/wiki/Video_compression_picture...

    A sequence of video frames, consisting of two keyframes (I), one forward-predicted frame (P) and one bi-directionally predicted frame (B). Three types of pictures (or frames) are used in video compression: I, P, and B frames. An I‑frame ( Intra-coded picture) is a complete image, like a JPG or BMP image file. A P‑frame (Predicted picture ...

  5. Frame rate - Wikipedia

    en.wikipedia.org/wiki/Frame_rate

    Frame rate. Frame rate, most commonly expressed in frames per second or FPS, is typically the frequency (rate) at which consecutive images ( frames) are captured or displayed. This definition applies to film and video cameras, computer animation, and motion capture systems. In these contexts, frame rate may be used interchangeably with frame ...

  6. Jumbo frame - Wikipedia

    en.wikipedia.org/wiki/Jumbo_frame

    Jumbo frames for PPPoE is defined in RFC 4638, with the purpose of removing the old 1492-byte limit (originally defined because PPP needs 8 more bytes of overhead), so that normal 1500-byte Ethernet can run without fragmentation. The "PPP-Max-Payload" tag can still accommodate much larger, non-baby jumbo frames.

  7. Group of pictures - Wikipedia

    en.wikipedia.org/wiki/Group_of_pictures

    The second one tells the distance between two full images (I-frames): it is the GOP size. [6] Instead of the M parameter, the maximal count of B-frames between two consecutive anchor frames can be used; this is the approach used by ffmpeg. [7] Examples: For M=3, N=12, the GOP structure is IBBPBBPBBPBB. There are 2 B-frames between two ...

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