RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avfilter/drawtext: change reload value to an interval 

Allows user to specify a frame interval at which textfile is reloaded.
This commit is contained in:
Gyan Doshi 2022-02-28 12:55:42 +05:30
parent 72604b10f4
commit 4b72bca6ca
2 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
doc/filters.texi
View File

@ -11278,8 +11278,10 @@ text data in detection bboxes of side data. So please do not use this parameter
if you are not sure about the text source.
@item reload
If set to 1, the @var{textfile} will be reloaded before each frame.
Be sure to update it atomically, or it may be read partially, or even fail.
The @var{textfile} will be reloaded at specified frame interval.
Be sure to update @var{textfile} atomically, or it may be read partially,
or even fail.
Range is 0 to INT_MAX. Default is 0.
@item x
@item y

6
libavfilter/vf_drawtext.c
View File

@ -198,7 +198,7 @@ typedef struct DrawTextContext {
AVRational tc_rate; ///< frame rate for timecode
AVTimecode tc; ///< timecode context
int tc24hmax; ///< 1 if timecode is wrapped to 24 hours, 0 otherwise
int reload; ///< reload text file for each frame
int reload; ///< reload text file at specified frame interval
int start_number; ///< starting frame number for n/frame_num var
char *text_source_string; ///< the string to specify text data source
enum AVFrameSideDataType text_source;
@ -245,7 +245,7 @@ static const AVOption drawtext_options[]= {
{"timecode_rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS},
{"r", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS},
{"rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS},
{"reload", "reload text file for each frame", OFFSET(reload), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"reload", "reload text file at specified frame interval", OFFSET(reload), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS},
{ "alpha", "apply alpha while rendering", OFFSET(a_expr), AV_OPT_TYPE_STRING, { .str = "1" }, .flags = FLAGS },
{"fix_bounds", "check and fix text coords to avoid clipping", OFFSET(fix_bounds), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"start_number", "start frame number for n/frame_num variable", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS},
@ -1565,7 +1565,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
}
}
if (s->reload) {
if (s->reload && !(inlink->frame_count_out % s->reload)) {
if ((ret = load_textfile(ctx)) < 0) {
av_frame_free(&frame);
return ret;