eyuvtoppm

Read a Berkeley YUV file from the specified input file, convert it to a PPM image and store it in the specified output file

$ eyuvtoppm --width [width] --height [height] [path/to/input_file.eyuv] > [path/to/output_file.ppm]

yuvtoppm [-raw] [-frames=N] [-nframes] [-verbose] [-width=W] [-height=H] [yuvfile]

-raw
    Assumes the input is a raw YUV stream without any header information. This is typically the default behavior and ensures the command interprets the data directly.

-frames=N
    Converts only the first N frames from the input YUV stream. If this option is omitted, yuvtoppm attempts to convert all available frames.

-nframes
    Instead of performing a conversion, this option causes the command to print the total number of frames found in the input YUV file to standard output and then exit, useful for inspecting file metadata.

-verbose
    Enables verbose output, providing more detailed information about the conversion process, such as frame numbers processed, to standard error (stderr).

-width=W
    Specifies the width of the input YUV image in pixels. This option is mandatory if the raw YUV stream does not contain embedded resolution information, as the command needs to know how to interpret the pixel data correctly.

-height=H
    Specifies the height of the input YUV image in pixels. Similar to the width, this option is crucial and often mandatory for raw YUV streams lacking intrinsic metadata about image dimensions.

yuvfile
    The path to the input YUV file. If this argument is not specified, yuvtoppm reads the YUV data from standard input (stdin), allowing it to be part of a pipeline.

The command 'eyuvtoppm' is not a standard Linux command. It is highly probable that this is a typographical error and the intended command is yuvtoppm, which is part of the Netpbm suite of graphics utilities.

yuvtoppm reads a raw YUV (Y'CbCr) image stream from standard input or a specified file and converts it into a Portable Pixmap (PPM) image file. YUV is a color encoding system commonly used in video processing and compression, separating luma (brightness) from chrominance (color) components. PPM is a simple, full-color raster image format. This tool is crucial for processing raw video data, enabling users to convert individual frames or sequences from a YUV stream into a more universally viewable and editable image format like PPM. It is particularly useful for debugging video pipelines, extracting specific frames from raw video captures, or integrating raw video data into other image processing workflows.

The command 'eyuvtoppm' is not a standard Linux utility and is most likely a typographical error. The analysis provided above pertains to yuvtoppm, which is part of the Netpbm package. To use yuvtoppm, ensure that the Netpbm suite is installed on your system. For raw YUV streams, providing correct -width and -height parameters is critical for a successful and accurate conversion, as the command cannot automatically deduce image dimensions without them.

yuvtoppm is one of hundreds of specialized tools within the Netpbm suite. These tools are designed to be composable, allowing users to pipe the output of one tool to the input of another. This modular design facilitates complex image processing workflows through simple command-line operations, adhering to the Unix philosophy of providing small, focused utilities that perform a single task well.

YUV is a color space encoding system where 'Y' represents the luma (brightness) component, and 'U' and 'V' represent the chrominance (color) components. This separation is advantageous for video compression and transmission because the human visual system is more sensitive to changes in brightness than color. yuvtoppm converts these separate components into the standard RGB (Red, Green, Blue) format, which is used by PPM and is directly compatible with most display devices and image editors.

The yuvtoppm command is a fundamental component of the Netpbm project, a comprehensive and long-standing toolkit for graphics manipulation. Netpbm evolved from the Pbmplus package, originally created by Jef Poskanzer in the late 1980s, with the goal of providing portable means for image format conversions. yuvtoppm was developed to specifically address the need to handle raw YUV video data, a common format in various video processing contexts, and seamlessly integrate it into the Netpbm ecosystem, which predominantly operates with PPM, PGM, and PBM image formats.

ppmtoyuv(1), yuvsplit(1), ppmtolss16(1), ppm(5), netpbm(1)