doc/demuxers.texi: Documented how to use the new parameter.
Usage example:
ffmpeg -i /dev/video0 -strftime 1 -strftime_mkdir 1
"/tmp/%Y/%m/%Y_%m_%d-%H_%M_%S.jpg"
---
doc/muxers.texi | 13 +++++++++++++
libavformat/img2enc.c | 28 +++++++++++++++++++++++-----
2 files changed, 36 insertions(+), 5 deletions(-)
diff --git a/doc/muxers.texi b/doc/muxers.texi
index f6071484ff..1d03fef84b 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -1421,6 +1421,19 @@ overwritten with new images. Default value is 0.
If set to 1, expand the filename with date and time information from
@code{strftime()}. Default value is 0.
+@item strftime_mkdir
+Used together with -strftime, if set to 1, it will create all subdirectories
+which are expanded in @var{filename}.
+@example
+ffmpeg -i /dev/video0 -strftime 1 -strftime_mkdir 1
"/tmp/%Y/%m/%Y_%m_%d-%H_%M_%S.jpg"
+@end example
+This example will read all frames from /dev/video0 and save each frame into
+@file{/tmp/%Y_%m/%Y_%m_%d-%H_%M_%S.jpg}, creating the necessary directory
+structure if it doesn't exist. Supposing the current date at the time of the
+image creation is 1978-04-27 15:01:02, the directory @file{/tmp/1978/04}
+would be created - if it didn't existed - prior from saving the output file
+@file{1978_04_27-15_01_02.jpg} into it.
+
@item atomic_writing
Write output to a temporary file, which is renamed to target filename once
writing is completed. Default is disabled.
diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c
index 9b8ec06cea..238f281467 100644
--- a/libavformat/img2enc.c
+++ b/libavformat/img2enc.c
@@ -44,6 +44,7 @@ typedef struct VideoMuxData {
char target[4][1024];
int update;
int use_strftime;
+ int use_strftime_mkdir;
int frame_pts;
const char *muxer;
int use_rename;
@@ -157,6 +158,22 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
av_log(s, AV_LOG_ERROR, "Could not get frame filename with
strftime\n");
return AVERROR(EINVAL);
}
+
+ // whether to create non-existing directory structure
+ if (img->use_strftime_mkdir) {
+ const char *dir;
+ char *fn_copy = av_strdup(filename);
+ if (!fn_copy)
+ return AVERROR(ENOMEM);
+ dir = av_dirname(fn_copy);
+ if (ff_mkdir_p(dir) == -1 && errno != EEXIST) {
+ av_log(s, AV_LOG_ERROR, "Could not create directory %s with
use_strftime_mkdir\n", dir);
+ av_freep(&fn_copy);
+ return AVERROR(errno);
+ }
+ av_log(s, AV_LOG_VERBOSE, "Created directory %s\n", dir);
+ av_freep(&fn_copy);
+ }
} else if (img->frame_pts) {
if (av_get_frame_filename2(filename, sizeof(filename), s->url,
pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the
frames.");
@@ -252,12 +269,13 @@ static int query_codec(enum AVCodecID id, int
std_compliance)
#define OFFSET(x) offsetof(VideoMuxData, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption muxoptions[] = {
- { "update", "continuously overwrite one file", OFFSET(update),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
- { "start_number", "set first number in the sequence",
OFFSET(start_img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
- { "strftime", "use strftime for filename", OFFSET(use_strftime),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
- { "frame_pts", "use current frame pts for filename", OFFSET(frame_pts),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
+ { "update", "continuously overwrite one file", OFFSET(update),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
+ { "start_number", "set first number in the sequence",
OFFSET(start_img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
+ { "strftime", "use strftime for filename", OFFSET(use_strftime),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
+ { "strftime_mkdir", "create directory structure for filename, if needed",
OFFSET(use_strftime_mkdir), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
+ { "frame_pts", "use current frame pts for filename",
OFFSET(frame_pts), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "atomic_writing", "write files atomically (using temporary files and
renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
- { "protocol_opts", "specify protocol options for the opened files",
OFFSET(protocol_opts), AV_OPT_TYPE_DICT, {0}, 0, 0, ENC },
+ { "protocol_opts", "specify protocol options for the opened files",
OFFSET(protocol_opts), AV_OPT_TYPE_DICT, {0}, 0, 0, ENC },
{ NULL },
};
--
2.34.1
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