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ffprobe: parse arguments for -print_format writer

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This allows -print_format to accept string of the form WRITER=OPTIONS,
as required by the pending compact writer patch.
This commit is contained in:
Stefano Sabatini 2011-10-02 11:26:07 +02:00
parent 9806dda8a8
commit cb50ada4f8
2 changed files with 30 additions and 11 deletions
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5
doc/ffprobe.texi
View File

@ -80,9 +80,12 @@ Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
Prettify the format of the displayed values, it corresponds to the
options "-unit -prefix -byte_binary_prefix -sexagesimal".
@item -print_format @var{format}
@item -print_format @var{writer_name}[=@var{writer_options}]
Set the output printing format.
@var{writer_name} specifies the name of the writer, and
@var{writer_options} specifies the options to be passed to the writer.
For example for printing the output in JSON format, specify:
@example
-print_format json

36
ffprobe.c
View File

@ -23,6 +23,7 @@
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/dict.h"
@ -737,23 +738,34 @@ static int probe_file(const char *filename)
AVFormatContext *fmt_ctx;
int ret;
Writer *w;
const char *buf = print_format;
char *w_str = NULL, *w_args = NULL;
WriterContext *wctx;
writer_register_all();
if (!print_format)
print_format = av_strdup("default");
w = writer_get_by_name(print_format);
if (!w) {
fprintf(stderr, "Invalid output format '%s'\n", print_format);
return AVERROR(EINVAL);
if (buf) {
w_str = av_get_token(&buf, "=");
if (*buf == '=') {
buf++;
w_args = av_get_token(&buf, "");
}
}
if ((ret = writer_open(&wctx, w, NULL, NULL)) < 0)
return ret;
if (!w_str)
w_str = av_strdup("default");
w = writer_get_by_name(w_str);
if (!w) {
av_log(NULL, AV_LOG_ERROR, "Invalid output format '%s'\n", w_str);
ret = AVERROR(EINVAL);
goto end;
}
if ((ret = writer_open(&wctx, w, w_args, NULL)) < 0)
goto end;
if ((ret = open_input_file(&fmt_ctx, filename)))
return ret;
goto end;
writer_print_header(wctx);
PRINT_CHAPTER(packets);
@ -764,7 +776,11 @@ static int probe_file(const char *filename)
av_close_input_file(fmt_ctx);
writer_close(&wctx);
return 0;
end:
av_free(w_str);
av_free(w_args);
return ret;
}
static void show_usage(void)