From 9df9309d233f59d9706444a1e24ac24139f2640d Mon Sep 17 00:00:00 2001 From: Peter Große Date: Mon, 30 Jan 2017 13:49:44 +0100 Subject: dashenc: calculate stream bitrate from first segment if not available MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Bandwidth information is required in the manifest, but not always provided by the demuxer. In that case calculate the bandwith based on the size and duration of the first segment. Signed-off-by: Peter Große Signed-off-by: Martin Storsjö --- libavformat/dashenc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c index 98722cd24e..21acb9006c 100644 --- a/libavformat/dashenc.c +++ b/libavformat/dashenc.c @@ -834,6 +834,16 @@ static int dash_flush(AVFormatContext *s, int final, int stream) if (ret < 0) break; } + + if (!os->bit_rate) { + // calculate average bitrate of first segment + int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / (os->max_pts - os->start_pts); + if (bitrate >= 0) { + 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); } -- cgit v1.2.3