[FFmpeg-devel] [PATCH] avfilter/drawtext: special metadata fields to allow plotting source filename to output.

[Alexandre Heitor Schmidt]

On 15/12/2019 15:04, Michael Niedermayer wrote:
 > On Sat, Dec 14, 2019 at 10:59:31PM +0000, Alexandre Heitor Schmidt wrote:
 >> avfilter/drawtext: Added two special metadata tags which can, be used by
 >> 'drawtext' filter and others to have access to source file path, and its
 >> basename.
 >>
 >> The new field AVPacket->source_file will contain a path to its 
corresponding
 >> filename everytime the packet corresponds to a single file. This 
behavior is
 >> common for image2 filter. When this field is filled, frames passed 
to filters
 >> will contain two special metadata tags called source_path (the 
entire path to
 >> the file) and source_basename (only the file name). These metatags 
can be
 >> used by filters like drawtext to be able to plot the entire path or the
 >> basename of it respectively to the frame being processed.
 >>
 >> doc/filters: The documentation for drawtext was also updated and an 
usage
 >> example was added.
 >>
 >> Fixes #2874.
 >>
 >> Signed-off-by: Alexandre Heitor Schmidt <alexandre.schmidt at gmail.com>
 >> ---
 >>  doc/filters.texi      | 13 +++++++++++++
 >>  fftools/ffmpeg.c      | 12 ++++++++++++
 >>  libavcodec/avcodec.h  |  8 ++++++++
 >>  libavcodec/avpacket.c |  1 +
 >>  libavformat/img2dec.c |  9 +++++++++
 >>  5 files changed, 43 insertions(+)
 >
 > doc/filters.texi:9885: misplaced {
 > doc/filters.texi:9885: misplaced }
 > make: *** [doc/ffprobe-all.html] Error 1
 > make: *** Waiting for unfinished jobs....
 > doc/filters.texi:9885: misplaced {
 > doc/filters.texi:9885: misplaced }
 > make: *** [doc/ffplay-all.html] Error 1
 > doc/filters.texi:9885: misplaced {
 > doc/filters.texi:9885: misplaced }
 > make: *** [doc/ffmpeg-all.html] Error 1
 > doc/filters.texi:9885: misplaced {
 > doc/filters.texi:9885: misplaced }
 > make: *** [doc/ffmpeg-filters.html] Error 1
 >
 > [...]

I saw the problem... git messed up the @item and @example tags in docs. 
:S I'll find out why and re-submit the patch. I have to redo it anyway 
to use AV_PKT_DATA_STRINGS_METADATA, as suggested by Marton Balint.

Alex.