diff options
author | Mark Thompson <sw@jkqxz.net> | 2017-05-04 23:09:02 +0100 |
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committer | Mark Thompson <sw@jkqxz.net> | 2017-08-13 17:48:49 +0100 |
commit | 9e93001b6135a23fe4e200196c08fb4fbffed6fc (patch) | |
tree | a8d9b136f77c590ad67594f298cfa83ad568ba17 /doc | |
parent | f11d8a5e8b185340cc50fcbc8a1437b0fbe7e931 (diff) |
lavc: Add h264_metadata bitstream filter
This is able to modify some header metadata found in the SPS/VUI,
and can also add/remove AUDs and insert user data in SEI NAL units.
Diffstat (limited to 'doc')
-rw-r--r-- | doc/bitstream_filters.texi | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi index 119a2267af..08f2f390cb 100644 --- a/doc/bitstream_filters.texi +++ b/doc/bitstream_filters.texi @@ -39,6 +39,69 @@ When this option is enabled, the long-term headers are removed from the bitstream after extraction. @end table +@section h264_metadata + +Modify metadata embedded in an H.264 stream. + +@table @option +@item aud +Insert or remove AUD NAL units in all access units of the stream. + +@table @samp +@item insert +@item remove +@end table + +@item sample_aspect_ratio +Set the sample aspect ratio of the stream in the VUI parameters. + +@item video_format +@item video_full_range_flag +Set the video format in the stream (see H.264 section E.2.1 and +table E-2). + +@item colour_primaries +@item transfer_characteristics +@item matrix_coefficients +Set the colour description in the stream (see H.264 section E.2.1 +and tables E-3, E-4 and E-5). + +@item chroma_sample_loc_type +Set the chroma sample location in the stream (see H.264 section +E.2.1 and figure E-1). + +@item tick_rate +Set the tick rate (num_units_in_tick / time_scale) in the VUI +parameters. This is the smallest time unit representable in the +stream, and in many cases represents the field rate of the stream +(double the frame rate). +@item fixed_frame_rate_flag +Set whether the stream has fixed framerate - typically this indicates +that the framerate is exactly half the tick rate, but the exact +meaning is dependent on interlacing and the picture structure (see +H.264 section E.2.1 and table E-6). + +@item crop_left +@item crop_right +@item crop_top +@item crop_bottom +Set the frame cropping offsets in the SPS. These values will replace +the current ones if the stream is already cropped. + +These fields are set in pixels. Note that some sizes may not be +representable if the chroma is subsampled or the stream is interlaced +(see H.264 section 7.4.2.1.1). + +@item sei_user_data +Insert a string as SEI unregistered user data. The argument must +be of the form @emph{UUID+string}, where the UUID is as hex digits +possibly separated by hyphens, and the string can be anything. + +For example, @samp{086f3693-b7b3-4f2c-9653-21492feee5b8+hello} will +insert the string ``hello'' associated with the given UUID. + +@end table + @section h264_mp4toannexb @section imx_dump_header |