DrKLO/Telegram · error

Required arguments:\n

Error message

Required arguments:\n

What it means

yuvjpeg is a mozjpeg CLI that converts a raw 4:2:0 YUV file to JPEG. main() requires exactly 5 argv elements (program + 4 args: quality, size, YUV in, JPG out). If argc != 5 it prints the usage header `Required arguments:` to stderr and returns 1. The subsequent fprintf lines (errors 192-194) are the argument descriptions printed as part of the same usage block.

Source

Thrown at TMessagesProj/jni/mozjpeg/yuvjpeg.c:117

  int frame_width;
  int frame_height;
  const char *yuv_path;
  const char *jpg_path;
  FILE *yuv_fd;
  size_t yuv_size;
  unsigned char *yuv_buffer;
  JSAMPLE *jpg_buffer;
  struct jpeg_compress_struct cinfo;
  struct jpeg_error_mgr jerr;
  FILE *jpg_fd;
  JSAMPROW yrow_pointer[16];
  JSAMPROW cbrow_pointer[8];
  JSAMPROW crrow_pointer[8];
  JSAMPROW *plane_pointer[3];
  int y;

  if (argc != 5) {
    fprintf(stderr, "Required arguments:\n");
    fprintf(stderr, "1. JPEG quality value, 0-100\n");
    fprintf(stderr, "2. Image size (e.g. '512x512')\n");
    fprintf(stderr, "3. Path to YUV input file\n");
    fprintf(stderr, "4. Path to JPG output file\n");
    return 1;
  }

  errno = 0;

  quality = strtol(argv[1], NULL, 10);
  if (errno != 0 || quality < 0 || quality > 100) {
    fprintf(stderr, "Invalid JPEG quality value!\n");
    return 1;
  }

  matches = sscanf(argv[2], "%dx%d", &luma_width, &luma_height);
  if (matches != 2) {
    fprintf(stderr, "Invalid image size input!\n");

View on GitHub (pinned to 45ab8f4308)

Solutions

1. Invoke as: yuvjpeg <quality 0-100> <WxH> <yuv_in> <jpg_out>.
2. Validate argc == 5 in the calling script before exec.
3. Double-check that no extra/blank arguments are appended.

Example fix

// before
yuvjpeg 90 512x512 in.yuv
// after
yuvjpeg 90 512x512 in.yuv out.jpg

/* yuvjpeg needs exactly 4 args: quality, size, yuv_in, jpg_out */
if (argc != 5) {
    fprintf(stderr, "usage: %s <quality 0-100> <WxH> <yuv_in> <jpg_out>\n", argv[0]);
    return 1;
}

When it happens

Trigger: Invoking yuvjpeg with any number of arguments other than 4 (too few or too many).

Common situations: Missing the size or output argument, passing flags yuvjpeg does not understand, or a wrapper script miscounting arguments.

Related errors

• %s: must name one input and one output file\n
• %s: only one input file\n
• 1. JPEG quality value, 0-100\n
• 2. Image size (e.g. '512x512')\n
• 3. Path to YUV input file\n

AI-assisted analysis of DrKLO/Telegram@45ab8f4308 (2026-08-14). Data as JSON: /api/errors/7c9e991d14f70ead. Report an issue: GitHub.