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Add hlsbitrate-v3: Estimate bandwidth if at least one of the streams bitrate is missing

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This commit is contained in:
Ingo Oppermann
2023-05-24 12:19:52 +02:00
parent cc1385543d
commit 761d55ce11
1 changed files with 47 additions and 15 deletions
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62
contrib/ffmpeg-hlsbitrate.patch
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@@ -1,14 +1,14 @@
From df74cdced975a6f13fdc24e43e75a7f9b571c661 Mon Sep 17 00:00:00 2001
From 194da7adf9477a49b30145ba342fcf6debd31af9 Mon Sep 17 00:00:00 2001
From: Ingo Oppermann <ingo@datarhei.com>
Date: Tue, 25 Oct 2022 10:43:45 +0200
Subject: [PATCH v2] Calculate bandwidth estimate (ffmpeg 5.1)
Date: Wed, 24 May 2023 12:16:52 +0200
Subject: [PATCH v3] Calculate bandwidth estimate (ffmpeg 5.1)
---
libavformat/hlsenc.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
libavformat/hlsenc.c | 54 ++++++++++++++++++++++++++++++++++++++++----
1 file changed, 49 insertions(+), 5 deletions(-)
diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 6f49ae1a..da7c3f21 100644
index 6f49ae1a..4d4805da 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -124,6 +124,7 @@ typedef struct VariantStream {
@@ -28,12 +28,43 @@ index 6f49ae1a..da7c3f21 100644
int64_t video_lastpos;
int64_t video_keyframe_pos;
int64_t video_keyframe_size;
@@ -1482,6 +1485,16 @@ static int create_master_playlist(AVFormatContext *s,
bandwidth += get_stream_bit_rate(vid_st);
if (aud_st)
bandwidth += get_stream_bit_rate(aud_st);
@@ -1372,7 +1375,7 @@ static int create_master_playlist(AVFormatContext *s,
AVStream *vid_st, *aud_st;
AVDictionary *options = NULL;
unsigned int i, j;
- int ret, bandwidth;
+ int ret, bandwidth, st_bandwidth, est_bandwidth;
const char *m3u8_rel_name = NULL;
const char *vtt_m3u8_rel_name = NULL;
const char *ccgroup;
@@ -1478,10 +1481,35 @@ static int create_master_playlist(AVFormatContext *s,
}
bandwidth = 0;
- if (vid_st)
- bandwidth += get_stream_bit_rate(vid_st);
- if (aud_st)
- bandwidth += get_stream_bit_rate(aud_st);
+ est_bandwidth = 0;
+
+ if (bandwidth == 0) {
+ if (vid_st) {
+ st_bandwidth = get_stream_bit_rate(vid_st);
+ if (st_bandwidth == 0) {
+ est_bandwidth = 1;
+ } else {
+ bandwidth += st_bandwidth;
+ }
+ }
+ if (aud_st) {
+ st_bandwidth = get_stream_bit_rate(aud_st);
+ if (st_bandwidth == 0) {
+ est_bandwidth = 1;
+ } else {
+ bandwidth += st_bandwidth;
+ }
+ }
+
+ if (est_bandwidth != 0) {
+ // Estimate bandwidth
+ bandwidth = (int)round((double)vs->bytes_written / (av_q2d(AV_TIME_BASE_Q) * (vs->scaled_cur_pts - vs->scaled_start_pts)) * 8);
+
@@ -42,10 +73,11 @@ index 6f49ae1a..da7c3f21 100644
+ vs->scaled_start_pts = vs->scaled_cur_pts;
+ }
+
+ // Add 10% of the bandwidth to itself
bandwidth += bandwidth / 10;
ccgroup = NULL;
@@ -2443,6 +2456,19 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
@@ -2443,6 +2471,19 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
return AVERROR(ENOMEM);
}
@@ -65,7 +97,7 @@ index 6f49ae1a..da7c3f21 100644
end_pts = hls->recording_time * vs->number;
if (vs->sequence - vs->nb_entries > hls->start_sequence && hls->init_time > 0) {
@@ -2663,6 +2689,7 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
@@ -2663,6 +2704,7 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
}
vs->packets_written++;
@@ -73,7 +105,7 @@ index 6f49ae1a..da7c3f21 100644
if (oc->pb) {
ret = ff_write_chained(oc, stream_index, pkt, s, 0);
vs->video_keyframe_size += pkt->size;
@@ -2956,6 +2983,8 @@ static int hls_init(AVFormatContext *s)
@@ -2956,6 +2998,8 @@ static int hls_init(AVFormatContext *s)
vs->sequence = hls->start_sequence;
vs->start_pts = AV_NOPTS_VALUE;
vs->end_pts = AV_NOPTS_VALUE;
@@ -85,5 +117,5 @@ index 6f49ae1a..da7c3f21 100644
base-commit: 2bca71f4986725d7cf0d441e2f82a790d0a0c717
--
2.32.1 (Apple Git-133)
2.39.2 (Apple Git-143)