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avfilter/vf_showinfo: add udu_sei_as_ascii option 

Some encoders (e.g., libx264) dump encoder configuration as user
data unregistered SEI message. This option try to print it as
ascii character when possible.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2023-12-13 11:46:48 +08:00
parent fb54c89a0d
commit 56ca0f2918
3 changed files with 17 additions and 3 deletions
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4
doc/filters.texi
View File

@ -21796,6 +21796,10 @@ This filter supports the following options:
@table @option
@item checksum
Calculate checksums of each plane. By default enabled.
@item udu_sei_as_ascii
Try to print user data unregistered SEI as ascii character when possible,
in hex format otherwise.
@end table
The shown line contains a sequence of key/value pairs of the form

2
libavfilter/version.h
View File

@ -32,7 +32,7 @@
#include "version_major.h"
#define LIBAVFILTER_VERSION_MINOR 14
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_MICRO 102
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

14
libavfilter/vf_showinfo.c
View File

@ -22,6 +22,7 @@
* filter for showing textual video frame information
*/
#include <ctype.h>
#include <inttypes.h>
#include "libavutil/bswap.h"
@ -52,6 +53,7 @@
typedef struct ShowInfoContext {
const AVClass *class;
int calculate_checksums;
int udu_sei_as_ascii;
} ShowInfoContext;
#define OFFSET(x) offsetof(ShowInfoContext, x)
@ -59,6 +61,8 @@ typedef struct ShowInfoContext {
static const AVOption showinfo_options[] = {
{ "checksum", "calculate checksums", OFFSET(calculate_checksums), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, VF },
{ "udu_sei_as_ascii", "try to print user data unregistered SEI as ascii character when possible",
OFFSET(udu_sei_as_ascii), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VF },
{ NULL }
};
@ -418,6 +422,7 @@ static void dump_video_enc_params(AVFilterContext *ctx, const AVFrameSideData *s
static void dump_sei_unregistered_metadata(AVFilterContext *ctx, const AVFrameSideData *sd)
{
const uint8_t *user_data = sd->data;
ShowInfoContext *s = ctx->priv;
if (sd->size < AV_UUID_LEN) {
av_log(ctx, AV_LOG_ERROR, "invalid data(%"SIZE_SPECIFIER" < "
@ -428,8 +433,13 @@ static void dump_sei_unregistered_metadata(AVFilterContext *ctx, const AVFrameSi
av_log(ctx, AV_LOG_INFO, "UUID=" AV_PRI_UUID "\n", AV_UUID_ARG(user_data));
av_log(ctx, AV_LOG_INFO, "User Data=");
for (size_t i = 16; i < sd->size; i++)
av_log(ctx, AV_LOG_INFO, "%02x", user_data[i]);
for (size_t i = 16; i < sd->size; i++) {
const char *format = "%02x";
if (s->udu_sei_as_ascii)
format = isprint(user_data[i]) ? "%c" : "\\x%02x";
av_log(ctx, AV_LOG_INFO, format, user_data[i]);
}
av_log(ctx, AV_LOG_INFO, "\n");
}