From f3e34072aadf20be60c0fae38cbe14ad4581c6a5 Mon Sep 17 00:00:00 2001
From: Steven Liu <lq@chinaffmpeg.org>
Date: Mon, 13 Nov 2017 10:52:01 +0800
Subject: [PATCH] avformat/img2enc: add frame_pts option for make output
filename
fix ticket id: #1452
when use frame_pts option, the output image name can be set with PTS
of current frame.
Signed-off-by: Steven Liu <lq@onvideo.cn>
---
doc/muxers.texi | 9 +++++++++
libavformat/img2enc.c | 7 +++++++
2 files changed, 16 insertions(+)
diff --git a/doc/muxers.texi b/doc/muxers.texi
index 43f3776b135..616568ebea6 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -897,9 +897,18 @@ can be used:
ffmpeg -f v4l2 -r 1 -i /dev/video0 -f image2 -strftime 1 "%Y-%m-%d_%H-%M-%S.jpg"
@end example
+You can set the file name with current frame's PTS:
+@example
+ffmpeg -f v4l2 -r 1 -i /dev/video0 -copyts -f image2 -frame_pts true %d.jpg"
+@end example
+
@subsection Options
@table @option
+@item frame_pts
+If set to 1, expand the filename with pts from pkt->pts.
+Default value is 0.
+
@item start_number
Start the sequence from the specified number. Default value is 1.
diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c
index 7d64659340d..b680676bff7 100644
--- a/libavformat/img2enc.c
+++ b/libavformat/img2enc.c
@@ -42,6 +42,7 @@ typedef struct VideoMuxData {
char target[4][1024];
int update;
int use_strftime;
+ int frame_pts;
const char *muxer;
int use_rename;
} VideoMuxData;
@@ -99,6 +100,11 @@ 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);
}
+ } else if (img->frame_pts) {
+ if (av_get_frame_filename2(filename, sizeof(filename), img->path, pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
+ av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the frames.");
+ return AVERROR(EINVAL);
+ }
} else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
img->img_number,
AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
@@ -206,6 +212,7 @@ 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(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 },
{ "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ NULL },
};
--
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