X-Git-Url: http://git.cinelerra-gg.org/git/?a=blobdiff_plain;f=cinelerra-5.1%2Fcinelerra%2Fffmpeg.C;h=dcbb49c63d4eeee18333df5bbacac178112e0d39;hb=9304882bd349ce15be054efb7cdcf69a0829f0f9;hp=f79a240ef5c844d091070f205e3dd68e1a799ee5;hpb=58d99c74e65066486dbebf7e1cb3087e7de1c92b;p=goodguy%2Fhistory.git

diff --git a/cinelerra-5.1/cinelerra/ffmpeg.C b/cinelerra-5.1/cinelerra/ffmpeg.C
index f79a240e..dcbb49c6 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.C
+++ b/cinelerra-5.1/cinelerra/ffmpeg.C
@@ -395,12 +395,11 @@ int FFStream::decode(AVFrame *frame)
 
 int FFStream::load_filter(AVFrame *frame)
 {
+	av_frame_unref(frame);
 	int ret = av_buffersrc_add_frame_flags(buffersrc_ctx,
 			frame, AV_BUFFERSRC_FLAG_KEEP_REF);
-	if( ret < 0 ) {
-		av_frame_unref(frame);
+	if( ret < 0 )
 		eprintf(_("av_buffersrc_add_frame_flags failed\n"));
-	}
 	return ret;
 }
 
@@ -418,6 +417,7 @@ int FFStream::read_filter(AVFrame *frame)
 
 int FFStream::read_frame(AVFrame *frame)
 {
+	av_frame_unref(frame);
 	if( !filter_graph || !buffersrc_ctx || !buffersink_ctx )
 		return decode(frame);
 	if( !fframe && !(fframe=av_frame_alloc()) ) {
@@ -491,7 +491,6 @@ int FFStream::flush()
 
 int FFStream::seek(int64_t no, double rate)
 {
-	int64_t tstmp = -INT64_MAX+1;
 // default ffmpeg native seek
 	int npkts = 1;
 	int64_t pos = no, pkt_pos = -1;
@@ -509,11 +508,24 @@ int FFStream::seek(int64_t no, double rate)
 		}
 	}
 	if( pos == curr_pos ) return 0;
-	if( pos > 0 && st->time_base.num > 0 ) {
-		double secs = pos / rate;
-		tstmp = secs * st->time_base.den / st->time_base.num;
-		if( nudge != AV_NOPTS_VALUE ) tstmp += nudge;
-	}
+	double secs = pos < 0 ? 0. : pos / rate;
+	AVRational time_base = st->time_base;
+	int64_t tstmp = time_base.num > 0 ? secs * time_base.den/time_base.num : 0;
+	if( !tstmp ) {
+		if( st->nb_index_entries > 0 ) tstmp = st->index_entries[0].timestamp;
+		else if( st->start_time != AV_NOPTS_VALUE ) tstmp = st->start_time;
+		else if( st->first_dts != AV_NOPTS_VALUE ) tstmp = st->first_dts;
+		else tstmp = INT64_MIN+1;
+	}
+	else if( nudge != AV_NOPTS_VALUE ) tstmp += nudge;
+	int idx = st->index;
+#if 0
+// seek all streams using the default timebase.
+//   this is how ffmpeg and ffplay work.  stream seeks are less tested.
+	tstmp = av_rescale_q(tstmp, time_base, AV_TIME_BASE_Q);
+	idx = -1;
+#endif
+
 	avcodec_flush_buffers(avctx);
 	avformat_flush(fmt_ctx);
 #if 0
@@ -523,9 +535,11 @@ int FFStream::seek(int64_t no, double rate)
 		seek = pkt_pos;
 		flags = AVSEEK_FLAG_BYTE;
 	}
-        int ret = avformat_seek_file(fmt_ctx, st->index, -INT64_MAX, seek, INT64_MAX, flags);
+	int ret = avformat_seek_file(fmt_ctx, st->index, -INT64_MAX, seek, INT64_MAX, flags);
 #else
-	int ret = av_seek_frame(fmt_ctx, st->index, tstmp, AVSEEK_FLAG_ANY);
+// finds the first index frame below the target time
+	int flags = AVSEEK_FLAG_BACKWARD | AVSEEK_FLAG_ANY;
+	int ret = av_seek_frame(fmt_ctx, idx, tstmp, flags);
 #endif
 	int retry = MAX_RETRY;
 	while( ret >= 0 ) {
@@ -559,7 +573,7 @@ int FFStream::seek(int64_t no, double rate)
 	if( ret < 0 ) {
 printf("** seek fail %jd, %jd\n", pos, tstmp);
 		seeked = need_packet = 0;
-	        st_eof(flushed=1);
+		st_eof(flushed=1);
 		return -1;
 	}
 //printf("seeked pos = %ld, %ld\n", pos, tstmp);
@@ -725,6 +739,7 @@ int FFAudioStream::load(int64_t pos, int len)
 			init_swr(frame->channels, frame->format, frame->sample_rate);
 			load_history(&frame->extended_data[0], frame->nb_samples);
 			curr_pos += frame->nb_samples;
+			i = 0;
 		}
 	}
 	if( end_pos > curr_pos ) {
@@ -854,7 +869,7 @@ int FFVideoStream::load(VFrame *vframe, int64_t pos)
 	}
 	for( int i=0; ret>=0 && !flushed && curr_pos<=pos && i<MAX_RETRY; ++i ) {
 		ret = read_frame(frame);
-		if( ret > 0 ) ++curr_pos;
+		if( ret > 0 ) { ++curr_pos;  i = 0; }
 	}
 	if( frame->format == AV_PIX_FMT_NONE || frame->width <= 0 || frame->height <= 0 )
 		ret = -1;