Merge commit '56ee3f9de7b9f6090d599a27d33a392890a2f7b8'

* commit '56ee3f9de7b9f6090d599a27d33a392890a2f7b8':
  avconv: distinguish between -ss 0 and -ss not being used

Conflicts:
	ffmpeg.c
	ffmpeg_opt.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

ffmpeg.c

@@ -751,7 +751,9 @@ static void do_subtitle_out(AVFormatContext *s,
         nb = 1;
 
     /* shift timestamp to honor -ss and make check_recording_time() work with -t */
-    pts = sub->pts - output_files[ost->file_index]->start_time;
+    pts = sub->pts;
+    if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE)
+        pts -= output_files[ost->file_index]->start_time;
     for (i = 0; i < nb; i++) {
         ost->sync_opts = av_rescale_q(pts, AV_TIME_BASE_Q, enc->time_base);
         if (!check_recording_time(ost))
@@ -1070,10 +1072,11 @@ static int reap_filters(void)
             }
             frame_pts = AV_NOPTS_VALUE;
             if (filtered_frame->pts != AV_NOPTS_VALUE) {
+                int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
                 filtered_frame->pts = 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);
             }
@@ -1377,7 +1380,7 @@ static int check_output_constraints(InputStream *ist, OutputStream *ost)
     if (ost->source_index != ist_index)
         return 0;
 
-    if (of->start_time && ist->pts < of->start_time)
+    if (of->start_time != AV_NOPTS_VALUE && ist->pts < of->start_time)
         return 0;
 
     return 1;
@@ -1386,8 +1389,9 @@ 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 ist_tb_start_time = av_rescale_q(of->start_time, AV_TIME_BASE_Q, ist->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);
+    int64_t ist_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ist->st->time_base);
     AVPicture pict;
     AVPacket opkt;
 
@@ -1398,7 +1402,7 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
         return;
 
     if (pkt->pts == AV_NOPTS_VALUE) {
-        if (!ost->frame_number && ist->pts < of->start_time &&
+        if (!ost->frame_number && ist->pts < start_time &&
             !ost->copy_prior_start)
             return;
     } else {
@@ -1408,7 +1412,7 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
     }
 
     if (of->recording_time != INT64_MAX &&
-        ist->pts >= of->recording_time + of->start_time) {
+        ist->pts >= of->recording_time + start_time) {
         close_output_stream(ost);
         return;
     }

ffmpeg_filter.c

@@ -286,11 +286,11 @@ 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;
 
     // Use with duration and without output starttime is buggy with trim filters
-    if (!of->start_time)
+    if (of->start_time == AV_NOPTS_VALUE)
         return 0;
 
     trim = avfilter_get_by_name(name);
@@ -310,7 +310,7 @@ 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);
     }

ffmpeg_opt.c

@@ -147,6 +147,7 @@ static void init_options(OptionsContext *o, int is_input)
         o->recording_time = INT64_MAX;
     o->stop_time = INT64_MAX;
     o->mux_max_delay  = 0.7;
+    o->start_time     = AV_NOPTS_VALUE;
     o->limit_filesize = UINT64_MAX;
     o->chapters_input_file = INT_MAX;
 }
@@ -824,13 +825,13 @@ 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 = avformat_seek_file(ic, -1, INT64_MIN, timestamp, timestamp, 0);
         if (ret < 0) {
             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
@@ -1451,7 +1452,8 @@ 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);
@@ -1586,11 +1588,12 @@ static int open_output_file(OptionsContext *o, const char *filename)
     }
 
     if (o->stop_time != INT64_MAX && o->recording_time == INT64_MAX) {
-        if (o->stop_time <= o->start_time) {
+        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_WARNING, "-to value smaller than -ss; ignoring -to.\n");
             o->stop_time = INT64_MAX;
         } else {
-            o->recording_time = o->stop_time - o->start_time;
+            o->recording_time = o->stop_time - start_time;
         }
     }