From: Vitaly _Vi Shukela <vi0...@gmail.com>
For some strange reason "-t" option was only implemented
for input files while both "-t" and "-to" were available
for use for output files. This made extracting a range from
input file inconvenient.
This patch enables -to option for input so one can do
ffmpeg -ss 1:23:20 -to 1:27:22.3 -i myinput.mkv ...
Signed-off-by: Vitaly _Vi Shukela <vi0...@gmail.com>
---
doc/ffmpeg.texi | 4 ++--
fftools/ffmpeg_opt.c | 17 ++++++++++++++++-
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 7db80ebf6a..9a90d7327a 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -289,8 +289,8 @@ see @ref{time duration syntax,,the Time duration section in
the ffmpeg-utils(1)
-to and -t are mutually exclusive and -t has priority.
-@item -to @var{position} (@emph{output})
-Stop writing the output at @var{position}.
+@item -to @var{position} (@emph{input/output})
+Stop writing the output or reading the input at @var{position}.
@var{position} must be a time duration specification,
see @ref{time duration syntax,,the Time duration section in the
ffmpeg-utils(1) manual,ffmpeg-utils}.
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 47d384166c..f66f672c3c 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -976,6 +976,21 @@ static int open_input_file(OptionsContext *o, const char
*filename)
char * data_codec_name = NULL;
int scan_all_pmts_set = 0;
+ if (o->stop_time != INT64_MAX && o->recording_time != INT64_MAX) {
+ o->stop_time = INT64_MAX;
+ av_log(NULL, AV_LOG_WARNING, "-t and -to cannot be used together;
using -t.\n");
+ }
+
+ if (o->stop_time != INT64_MAX && o->recording_time == INT64_MAX) {
+ int64_t start_time = o->start_time == AV_NOPTS_VALUE ? 0 :
o->start_time;
+ if (o->stop_time <= start_time) {
+ av_log(NULL, AV_LOG_ERROR, "-to value smaller than -ss;
aborting.\n");
+ exit_program(1);
+ } else {
+ o->recording_time = o->stop_time - start_time;
+ }
+ }
+
if (o->format) {
if (!(file_iformat = av_find_input_format(o->format))) {
av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n",
o->format);
@@ -3407,7 +3422,7 @@ const OptionDef options[] = {
OPT_INPUT | OPT_OUTPUT, { .off =
OFFSET(recording_time) },
"record or transcode \"duration\" seconds of audio/video",
"duration" },
- { "to", HAS_ARG | OPT_TIME | OPT_OFFSET | OPT_OUTPUT, { .off
= OFFSET(stop_time) },
+ { "to", HAS_ARG | OPT_TIME | OPT_OFFSET | OPT_INPUT |
OPT_OUTPUT, { .off = OFFSET(stop_time) },
"record or transcode stop time", "time_stop" },
{ "fs", HAS_ARG | OPT_INT64 | OPT_OFFSET | OPT_OUTPUT, { .off
= OFFSET(limit_filesize) },
"set the limit file size in bytes", "limit_size" },
--
2.11.0
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