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ffprobe: implement -sections option

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This commit is contained in:
Stefano Sabatini 2012-11-20 00:08:48 +01:00
parent 196765a7cc
commit c8a5365dcf
3 changed files with 39 additions and 0 deletions
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1
Changelog
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@ -28,6 +28,7 @@ version <next>:
- new expansion syntax for drawtext
- BRender PIX image decoder
- ffprobe -show_entries option
- ffprobe -sections option
version 1.0:

8
doc/ffprobe.texi
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@ -45,6 +45,10 @@ ffprobe output is designed to be easily parsable by a textual filter,
and consists of one or more sections of a form defined by the selected
writer, which is specified by the @option{print_format} option.
Sections may contain other nested sections, and are identified by a
name (which may be shared by other sections), and an unique
name. See the output of @option{sections}.
Metadata tags stored in the container or in the streams are recognized
and printed in the corresponding "FORMAT" or "STREAM" section.
@ -94,6 +98,10 @@ For example for printing the output in JSON format, specify:
For more details on the available output printing formats, see the
Writers section below.
@item -sections
Print sections structure and section information, and exit. The output
is not meant to be parsed by a machine.
@item -select_streams @var{stream_specifier}
Select only the streams specified by @var{stream_specifier}. This
option affects only the options related to streams

30
ffprobe.c
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@ -2105,6 +2105,35 @@ static int opt_pretty(void *optctx, const char *opt, const char *arg)
return 0;
}
static void print_section(SectionID id, int level)
{
const SectionID *pid;
const struct section *section = &sections[id];
printf("%c%c%c",
section->flags & SECTION_FLAG_IS_WRAPPER ? 'W' : '.',
section->flags & SECTION_FLAG_IS_ARRAY ? 'A' : '.',
section->flags & SECTION_FLAG_HAS_VARIABLE_FIELDS ? 'V' : '.');
printf("%*c %s", level * 4, ' ', section->name);
if (section->unique_name)
printf("/%s", section->unique_name);
printf("\n");
for (pid = section->children_ids; *pid != -1; pid++)
print_section(*pid, level+1);
}
static int opt_sections(void *optctx, const char *opt, const char *arg)
{
printf("Sections:\n"
"W.. = Section is a wrapper (contains other sections, no local entries)\n"
".A. = Section contains an array of elements of the same type\n"
"..V = Section may contain a variable number of fields with variable keys\n"
"FLAGS NAME/UNIQUE_NAME\n"
"---\n");
print_section(SECTION_ID_ROOT, 0);
return 0;
}
static int opt_show_versions(const char *opt, const char *arg)
{
mark_section_show_entries(SECTION_ID_PROGRAM_VERSION, 1, NULL);
@ -2142,6 +2171,7 @@ static const OptionDef real_options[] = {
"set the output printing format (available formats are: default, compact, csv, flat, ini, json, xml)", "format" },
{ "of", OPT_STRING | HAS_ARG, {(void*)&print_format}, "alias for -print_format", "format" },
{ "select_streams", OPT_STRING | HAS_ARG, {(void*)&stream_specifier}, "select the specified streams", "stream_specifier" },
{ "sections", OPT_EXIT, {.func_arg = opt_sections}, "print sections structure and section information, and exit" },
{ "show_data", OPT_BOOL, {(void*)&do_show_data}, "show packets data" },
{ "show_error", 0, {(void*)&opt_show_error}, "show probing error" },
{ "show_format", 0, {(void*)&opt_show_format}, "show format/container info" },