update for ffmpeg api

genvideo/src/main.rs

@@ -1,3 +1,4 @@
+use ffmpeg_next::ChannelLayout;
 use ffmpeg_next::util::{mathematics::Rescale, rational::Rational};
 use ffmpeg_next::{
     format::context::Output as FFOut,
@@ -195,14 +196,14 @@ impl AudioState {
             (*aps).codec_type = ffmpeg_next::ffi::AVMediaType::AVMEDIA_TYPE_AUDIO;
             (*aps).sample_rate = 48000;
             (*aps).frame_size = 1024;
-            (*aps).channels = 2;
+            ffmpeg_next::ffi::av_channel_layout_default(&mut ((*aps).ch_layout), 2);
         };
         out_audio_ctx.set_parameters(audio_params).unwrap();
         let _out_audio = output.add_stream_with(&out_audio_ctx).unwrap();
         let encoded_audio = ffmpeg_next::Packet::empty();
         let audio_time_base = Rational::new(1, 48000);
         let mut out_audio_enc = out_audio_ctx.encoder().audio().unwrap();
-        out_audio_enc.set_channels(2);
+        out_audio_enc.set_channel_layout(ChannelLayout::default(2));
         out_audio_enc.set_format(ffmpeg_next::format::Sample::F32(
             ffmpeg_next::format::sample::Type::Planar,
         ));