X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=ffmpeg_capture.cpp;h=42bdb2f765d65b18e69a2543793a08ad38590cfc;hb=b9feb66845bf24465b7671ac9ff7a52b88f6032b;hp=9a151b60d044c9eb038cdcc7a8c74b5a98e7bbd5;hpb=804bfa72263942d9beebe749ef0c8dc07a811413;p=nageru

diff --git a/ffmpeg_capture.cpp b/ffmpeg_capture.cpp
index 9a151b6..42bdb2f 100644
--- a/ffmpeg_capture.cpp
+++ b/ffmpeg_capture.cpp
@@ -381,8 +381,9 @@ bool FFmpegCapture::play_video(const string &pathname)
 		video_codec_ctx.get(), avcodec_close);
 
 	// Open audio decoder, if we have audio.
-	AVCodecContextWithDeleter audio_codec_ctx = avcodec_alloc_context3_unique(nullptr);
+	AVCodecContextWithDeleter audio_codec_ctx;
 	if (audio_stream_index != -1) {
+		audio_codec_ctx = avcodec_alloc_context3_unique(nullptr);
 		const AVCodecParameters *audio_codecpar = format_ctx->streams[audio_stream_index]->codecpar;
 		audio_timebase = format_ctx->streams[audio_stream_index]->time_base;
 		if (avcodec_parameters_to_context(audio_codec_ctx.get(), audio_codecpar) < 0) {
@@ -645,10 +646,15 @@ void FFmpegCapture::convert_audio(const AVFrame *audio_avframe, FrameAllocator::
 	}
 	audio_format->num_channels = 2;
 
+	int64_t channel_layout = audio_avframe->channel_layout;
+	if (channel_layout == 0) {
+		channel_layout = av_get_default_channel_layout(audio_avframe->channels);
+	}
+
 	if (resampler == nullptr ||
 	    audio_avframe->format != last_src_format ||
 	    dst_format != last_dst_format ||
-	    av_frame_get_channel_layout(audio_avframe) != last_channel_layout ||
+	    channel_layout != last_channel_layout ||
 	    av_frame_get_sample_rate(audio_avframe) != last_sample_rate) {
 		avresample_free(&resampler);
 		resampler = avresample_alloc_context();
@@ -657,7 +663,7 @@ void FFmpegCapture::convert_audio(const AVFrame *audio_avframe, FrameAllocator::
 			exit(1);
 		}
 
-		av_opt_set_int(resampler, "in_channel_layout",  av_frame_get_channel_layout(audio_avframe), 0);
+		av_opt_set_int(resampler, "in_channel_layout",  channel_layout,                             0);
 		av_opt_set_int(resampler, "out_channel_layout", AV_CH_LAYOUT_STEREO,                        0);
 		av_opt_set_int(resampler, "in_sample_rate",     av_frame_get_sample_rate(audio_avframe),    0);
 		av_opt_set_int(resampler, "out_sample_rate",    OUTPUT_FREQUENCY,                           0);
@@ -671,7 +677,7 @@ void FFmpegCapture::convert_audio(const AVFrame *audio_avframe, FrameAllocator::
 
 		last_src_format = AVSampleFormat(audio_avframe->format);
 		last_dst_format = dst_format;
-		last_channel_layout = av_frame_get_channel_layout(audio_avframe);
+		last_channel_layout = channel_layout;
 		last_sample_rate = av_frame_get_sample_rate(audio_avframe);
 	}
 
@@ -680,7 +686,7 @@ void FFmpegCapture::convert_audio(const AVFrame *audio_avframe, FrameAllocator::
 
 	uint8_t *data = audio_frame->data + audio_frame->len;
 	int out_samples = avresample_convert(resampler, &data, 0, num_samples_room,
-		audio_avframe->data, audio_avframe->linesize[0], audio_avframe->nb_samples);
+		const_cast<uint8_t **>(audio_avframe->data), audio_avframe->linesize[0], audio_avframe->nb_samples);
 	if (out_samples < 0) {
                 fprintf(stderr, "Audio conversion failed.\n");
                 exit(1);