Wireshark · Display Filter Reference: JPEG File Interchange Format

Field name	Description	Type	Versions
image-jfif.app0-identifier-not-jfif	Initial App0 segment with "JFIF" Identifier not found	Label	2.0.0 to 4.4.2
image-jfif.comment	Comment	Character string	2.0.0 to 4.4.2
image-jfif.endianness	Endianness	Unsigned integer (16 bits)	2.0.0 to 4.4.2
image-jfif.entropy_coded_segment	Entropy-coded segment (dissection is not yet implemented)	Byte sequence	2.0.0 to 4.4.2
image-jfif.exif_flashpix_marker	Exif FlashPix APP2 application marker	Label	2.0.0 to 4.4.2
image-jfif.extension.code	Extension code	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.fill_bytes	Fill bytes	Byte sequence	2.0.0 to 4.4.2
image-jfif.header.comment	Comment header	Label	2.0.0 to 4.4.2
image-jfif.header.sos	Start of Segment header	Label	1.0.0 to 4.4.2
image-jfif.identifier	Identifier	Character string	1.0.0 to 4.4.2
image-jfif.ifd.count	Count	Unsigned integer (32 bits)	2.0.0 to 4.4.2
image-jfif.ifd.num_fields	Number of fields in this IFD	Unsigned integer (16 bits)	2.0.0 to 4.4.2
image-jfif.ifd.offset	Value offset from start of TIFF header	Unsigned integer (32 bits)	2.0.0 to 4.4.2
image-jfif.ifd.tag	Tag	Unsigned integer (16 bits)	2.0.0 to 4.4.2
image-jfif.ifd.tag_exif	Tag	Unsigned integer (16 bits)	4.0.0 to 4.4.2
image-jfif.ifd.tag_gps	Tag	Unsigned integer (16 bits)	4.0.0 to 4.4.2
image-jfif.ifd.tag_interop	Tag	Unsigned integer (16 bits)	4.0.0 to 4.4.2
image-jfif.ifd.type	Type	Unsigned integer (16 bits)	2.0.0 to 4.4.2
image-jfif.ifd.value_ascii	Value	Character string	4.0.0 to 4.4.2
image-jfif.ifd.value_byte	Value	Unsigned integer (8 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_long	Value	Unsigned integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_rational	Value	Label	4.0.0 to 4.4.2
image-jfif.ifd.value_rational.denominator	Denominator	Unsigned integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_rational.numerator	Numerator	Unsigned integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_short	Value	Unsigned integer (16 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_slong	Value	Signed integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_srational	Value	Label	4.0.0 to 4.4.2
image-jfif.ifd.value_srational.denominator	Denominator	Signed integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_srational.numerator	Numerator	Signed integer (32 bits)	4.0.0 to 4.4.2
image-jfif.ifd.value_undefined	Value (raw)	Byte sequence	4.0.0 to 4.4.2
image-jfif.ifd_value_offset.invalid	Invalid value	Label	4.0.0 to 4.4.2
image-jfif.length	Length	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.marker	Marker	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.marker_segment	Marker segment	Label	1.8.0 to 4.4.2
image-jfif.next_ifd_offset	Offset to next IFD from start of TIFF header	Unsigned integer (32 bits)	2.0.0 to 4.4.2
image-jfif.next_ifd_offset.invalid	Invalid value	Label	2.0.0 to 4.4.2
image-jfif.remain_seg_data	Remaining segment data	Byte sequence	2.0.0 to 4.4.2
image-jfif.RGB	RGB values of thumbnail pixels	Byte sequence	1.0.0 to 4.4.2
image-jfif.skipped_tiff_data	Skipped data between end of TIFF header and start of IFD	Byte sequence	2.0.0 to 4.4.2
image-jfif.sof	Start of Frame header	Label	1.0.0 to 4.4.2
image-jfif.sof.c_i	Component identifier	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sof.h_i	Horizontal sampling factor	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sof.lines	Lines	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.sof.nf	Number of image components in frame	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sof.precision	Sample Precision (bits)	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sof.samples_per_line	Samples per line	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.sof.tq_i	Quantization table destination selector	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sof.v_i	Vertical sampling factor	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.ac_entropy_selector	AC entropy coding table destination selector	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.ah	Successive approximation bit position high	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.al	Successive approximation bit position low or point transform	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.component_selector	Scan component selector	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.dc_entropy_selector	DC entropy coding table destination selector	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.ns	Number of image components in scan	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.se	End of spectral selection	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.sos.ss	Start of spectral or predictor selection	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.start_ifd_offset	Start offset of IFD starting from the TIFF header start	Unsigned integer (32 bits)	2.0.0 to 4.4.2
image-jfif.start_ifd_offset.invalid	Invalid value	Label	2.0.0 to 4.4.2
image-jfif.units	Units	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.version	Version	Label	1.0.0 to 4.4.2
image-jfif.version.major	Major Version	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.version.minor	Minor Version	Unsigned integer (8 bits)	1.0.0 to 4.4.2
image-jfif.Xdensity	Xdensity	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.Xthumbnail	Xthumbnail	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.Ydensity	Ydensity	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfif.Ythumbnail	Ythumbnail	Unsigned integer (16 bits)	1.0.0 to 4.4.2
image-jfifmarker_segment	Marker segment	Label	1.0.0 to 1.6.16