Add a --disable-audio option to Kaeru, to transcode streams with no audio.

[nageru] / nageru / kaeru.cpp

diff --git a/nageru/kaeru.cpp b/nageru/kaeru.cpp
index 32b497d200f924c7289c146759094e75bd9c199e..b10324c8b4091516072294a521ce66b76760041e 100644 (file)
--- a/nageru/kaeru.cpp
+++ b/nageru/kaeru.cpp
@@ -71,8 +71,13 @@ unique_ptr<Mux> create_mux(HTTPD *httpd, AVOutputFormat *oformat, X264Encoder *x
 
        string video_extradata = x264_encoder->get_global_headers();
 
+       // If audio is disabled (ie., we won't ever see any audio packets),
+       // set nullptr here to also not include the stream in the mux.
+       AVCodecParameters *audio_codecpar =
+               global_flags.enable_audio ? audio_encoder->get_codec_parameters().get() : nullptr;
+
        unique_ptr<Mux> mux;
-       mux.reset(new Mux(avctx, global_flags.width, global_flags.height, Mux::CODEC_H264, video_extradata, audio_encoder->get_codec_parameters().get(),
+       mux.reset(new Mux(avctx, global_flags.width, global_flags.height, Mux::CODEC_H264, video_extradata, audio_codecpar,
                get_color_space(global_flags.ycbcr_rec709_coefficients), COARSE_TIMEBASE,
                /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, { &stream_mux_metrics }));
        stream_mux_metrics.init({{ "destination", "http" }});
@@ -205,7 +210,7 @@ int main(int argc, char *argv[])
        FFmpegCapture video(argv[optind], global_flags.width, global_flags.height);
        video.set_pixel_format(FFmpegCapture::PixelFormat_NV12);
        video.set_frame_callback(bind(video_frame_callback, &video, x264_encoder.get(), audio_encoder.get(), _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11));
-       if (!global_flags.transcode_audio) {
+       if (!global_flags.transcode_audio && global_flags.enable_audio) {
                video.set_audio_callback(bind(audio_frame_callback, http_mux.get(), _1, _2));
        }
        video.configure_card();