On Fri, 27 Jan 2017, Peter Große wrote:
Bandwidth information is required in the manifest, but not always
provided by the demuxer. If not available via metadata calculate
bandwith based on the size and duration of the first segment.
Signed-off-by: Peter Große <[email protected]>
---
libavformat/dashenc.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index 1cd9563..1b12d4f 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -846,6 +846,17 @@ static int dash_flush(AVFormatContext *s, int final, int
stream)
if (ret < 0)
break;
}
+
+ if (!os->bit_rate) {
+ // calculate average bitrate of first segment
+ double bitrate = (int)( (double) range_length * 8.0 * AV_TIME_BASE /
(double)(os->max_pts - os->start_pts) );
+ if (bitrate >= 0 && bitrate <= INT64_MAX) {
+ os->bit_rate = bitrate;
+ snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
+ " bandwidth=\"%d\"", os->bit_rate);
+ }
+ }
+
add_segment(os, filename, os->start_pts, os->max_pts - os->start_pts,
start_pos, range_length, index_length);
av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to:
%s\n", i, os->segment_index, full_path);
}
--
2.10.2
This probably is fine with me.
We can have $Bandwidth$ as part of the segment filename template - I guess
this is too late to get it right for those cases? Although I don't mind if
we don't support that case when we don't have a nominal bitrate set and
try to use it in the template.
// Martin
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