[FFmpeg-cvslog] avconv: distinguish between -ss 0 and -ss not being used
Anton Khirnov
git at videolan.org
Tue Aug 6 10:43:40 CEST 2013
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sat Jun 15 09:35:10 2013 +0200| [56ee3f9de7b9f6090d599a27d33a392890a2f7b8] | committer: Anton Khirnov
avconv: distinguish between -ss 0 and -ss not being used
Using -ss 0 to drop frames with negative timestamps is a perfectly valid
use case.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=56ee3f9de7b9f6090d599a27d33a392890a2f7b8
---
avconv.c | 10 ++++++----
avconv_filter.c | 4 ++--
avconv_opt.c | 8 +++++---
3 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/avconv.c b/avconv.c
index 3157c96..adea0ad 100644
--- a/avconv.c
+++ b/avconv.c
@@ -652,10 +652,11 @@ static int poll_filter(OutputStream *ost)
return ret;
if (filtered_frame->pts != AV_NOPTS_VALUE) {
+ int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
filtered_frame->pts = av_rescale_q(filtered_frame->pts,
ost->filter->filter->inputs[0]->time_base,
ost->st->codec->time_base) -
- av_rescale_q(of->start_time,
+ av_rescale_q(start_time,
AV_TIME_BASE_Q,
ost->st->codec->time_base);
}
@@ -948,7 +949,7 @@ static int check_output_constraints(InputStream *ist, OutputStream *ost)
if (ost->source_index != ist_index)
return 0;
- if (of->start_time && ist->last_dts < of->start_time)
+ if (of->start_time != AV_NOPTS_VALUE && ist->last_dts < of->start_time)
return 0;
return 1;
@@ -957,7 +958,8 @@ static int check_output_constraints(InputStream *ist, OutputStream *ost)
static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
{
OutputFile *of = output_files[ost->file_index];
- int64_t ost_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ost->st->time_base);
+ int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
+ int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
AVPacket opkt;
av_init_packet(&opkt);
@@ -967,7 +969,7 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
return;
if (of->recording_time != INT64_MAX &&
- ist->last_dts >= of->recording_time + of->start_time) {
+ ist->last_dts >= of->recording_time + start_time) {
ost->finished = 1;
return;
}
diff --git a/avconv_filter.c b/avconv_filter.c
index 15c7def..0e27650 100644
--- a/avconv_filter.c
+++ b/avconv_filter.c
@@ -183,7 +183,7 @@ static int insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pa
char filter_name[128];
int ret = 0;
- if (of->recording_time == INT64_MAX && !of->start_time)
+ if (of->recording_time == INT64_MAX && of->start_time == AV_NOPTS_VALUE)
return 0;
trim = avfilter_get_by_name(name);
@@ -203,7 +203,7 @@ static int insert_trim(OutputStream *ost, AVFilterContext **last_filter, int *pa
ret = av_opt_set_double(ctx, "duration", (double)of->recording_time / 1e6,
AV_OPT_SEARCH_CHILDREN);
}
- if (ret >= 0 && of->start_time) {
+ if (ret >= 0 && of->start_time != AV_NOPTS_VALUE) {
ret = av_opt_set_double(ctx, "start", (double)of->start_time / 1e6,
AV_OPT_SEARCH_CHILDREN);
}
diff --git a/avconv_opt.c b/avconv_opt.c
index f96fece..c8d9176 100644
--- a/avconv_opt.c
+++ b/avconv_opt.c
@@ -113,6 +113,7 @@ static void init_options(OptionsContext *o)
memset(o, 0, sizeof(*o));
o->mux_max_delay = 0.7;
+ o->start_time = AV_NOPTS_VALUE;
o->recording_time = INT64_MAX;
o->limit_filesize = UINT64_MAX;
o->chapters_input_file = INT_MAX;
@@ -658,13 +659,13 @@ static int open_input_file(OptionsContext *o, const char *filename)
exit_program(1);
}
- timestamp = o->start_time;
+ timestamp = (o->start_time == AV_NOPTS_VALUE) ? 0 : o->start_time;
/* add the stream start time */
if (ic->start_time != AV_NOPTS_VALUE)
timestamp += ic->start_time;
/* if seeking requested, we execute it */
- if (o->start_time != 0) {
+ if (o->start_time != AV_NOPTS_VALUE) {
ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
if (ret < 0) {
av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
@@ -1212,7 +1213,8 @@ static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
for (i = 0; i < is->nb_chapters; i++) {
AVChapter *in_ch = is->chapters[i], *out_ch;
- int64_t ts_off = av_rescale_q(ofile->start_time - ifile->ts_offset,
+ int64_t start_time = (ofile->start_time == AV_NOPTS_VALUE) ? 0 : ofile->start_time;
+ int64_t ts_off = av_rescale_q(start_time - ifile->ts_offset,
AV_TIME_BASE_Q, in_ch->time_base);
int64_t rt = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
More information about the ffmpeg-cvslog
mailing list