Signed-off-by: Tobias Rapp <[email protected]>
---
ffmpeg.c | 9 +++++++++
libavformat/avformat.h | 3 +++
2 files changed, 12 insertions(+)
diff --git a/ffmpeg.c b/ffmpeg.c
index 6d1e358..977708c 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2908,6 +2908,10 @@ static int init_output_stream_streamcopy(OutputStream
*ost)
if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0)
ost->st->time_base = av_add_q(av_stream_get_codec_timebase(ost->st),
(AVRational){0, 1});
+ // copy estimated duration as a hint to the muxer
+ if (ost->st->duration <= 0 && ist->st->duration > 0)
+ ost->st->duration = av_rescale_q(ist->st->duration,
ist->st->time_base, ost->st->time_base);
+
// copy disposition
ost->st->disposition = ist->st->disposition;
@@ -3333,6 +3337,11 @@ static int init_output_stream(OutputStream *ost, char
*error, int error_len)
// copy timebase while removing common factors
if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0)
ost->st->time_base = av_add_q(ost->enc_ctx->time_base,
(AVRational){0, 1});
+
+ // copy estimated duration as a hint to the muxer
+ if (ost->st->duration <= 0 && ist && ist->st->duration > 0)
+ ost->st->duration = av_rescale_q(ist->st->duration,
ist->st->time_base, ost->st->time_base);
+
ost->st->codec->codec= ost->enc_ctx->codec;
} else if (ost->stream_copy) {
ret = init_output_stream_streamcopy(ost);
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index af257e4..ebb0e05 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -930,6 +930,9 @@ typedef struct AVStream {
* Decoding: duration of the stream, in stream time base.
* If a source file does not specify a duration, but does specify
* a bitrate, this value will be estimated from bitrate and file size.
+ *
+ * Encoding: May be set by the caller before avformat_write_header() to
+ * provide a hint to the muxer about the estimated duration.
*/
int64_t duration;
--
1.9.1
_______________________________________________
ffmpeg-devel mailing list
[email protected]
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
