From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sat, 5 Aug 2023 12:03:24 +0000 (+0200)
Subject: Add AVFMT_FLAG_AUTO_BSF when muxing, just in case.
X-Git-Tag: 2.3.0~30
X-Git-Url: https://git.sesse.net/?p=nageru;a=commitdiff_plain;h=09901e0f11c33c5e4b5ceef71036d61686e5fc68

Add AVFMT_FLAG_AUTO_BSF when muxing, just in case.
---

diff --git a/shared/mux.cpp b/shared/mux.cpp
index 9216055..819638c 100644
--- a/shared/mux.cpp
+++ b/shared/mux.cpp
@@ -50,6 +50,13 @@ struct PacketBefore {
 Mux::Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const string &video_extradata, const AVCodecParameters *audio_codecpar, AVColorSpace color_space, int time_base, function<void(int64_t)> write_callback, WriteStrategy write_strategy, const vector<MuxMetrics *> &metrics, WithSubtitles with_subtitles)
 	: write_strategy(write_strategy), avctx(avctx), write_callback(write_callback), metrics(metrics)
 {
+	// MPEG-TS ostensibly needs some conversions (e.g. for differing start codes),
+	// so let FFmpeg insert them as needed in case we are muxing to that.
+	// Curiously enough, things actually seem to go quite fine without
+	// (and it also seems FFmpeg's MPEG-TS muxer automatically does stuff like
+	// repeat PPS/SPS before keyframes for us), but it can't hurt.
+	avctx->flags |= AVFMT_FLAG_AUTO_BSF;
+
 	AVStream *avstream_video = avformat_new_stream(avctx, nullptr);
 	if (avstream_video == nullptr) {
 		fprintf(stderr, "avformat_new_stream() failed\n");