diff --git a/examples/ffmpeg_recorder.rs b/examples/ffmpeg_recorder.rs
index f95936e..03237ae 100644
--- a/examples/ffmpeg_recorder.rs
+++ b/examples/ffmpeg_recorder.rs
@@ -107,6 +107,7 @@ fn audio_filter(
             .capabilities()
             .contains(ffmpeg::codec::capabilities::Capabilities::VARIABLE_FRAME_SIZE)
         {
+            eprintln!("setting constant frame size {}", audio_encoder.frame_size());
             afilter
                 .get("out")
                 .unwrap()
@@ -136,7 +137,9 @@ impl MyEmulator {
         let fps_int = if fps_int == 0 { 60 } else { fps_int };
 
         let detected_vcodec = octx.format().codec(&video_path, media::Type::Video);
-        let detected_acodec = octx.format().codec(&video_path, media::Type::Audio);
+        //let detected_acodec = octx.format().codec(&video_path, media::Type::Audio);
+let wavname  = Path::new("out.wav");
+        let detected_acodec = octx.format().codec(&wavname, media::Type::Audio);
 
         let vcodec = ffmpeg::encoder::find(detected_vcodec).unwrap().video().unwrap();
         let acodec = ffmpeg::encoder::find(detected_acodec).unwrap().audio().unwrap();
@@ -186,8 +189,9 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
    */
 
 
-        audio_encoder.set_bit_rate(64000);
-        audio_encoder.set_rate(44100);
+        audio_encoder.set_bit_rate(640000);
+        //audio_encoder.set_rate(44100);
+        audio_encoder.set_rate(av_info.timing.sample_rate.round() as i32);
         audio_encoder.set_format(audio_encoder.codec().unwrap().audio().unwrap().formats().unwrap().nth(0).unwrap());
         audio_encoder.set_channels(2);
         audio_encoder.set_channel_layout(ChannelLayout::STEREO);
@@ -197,10 +201,11 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
         let mut audio_encoder = audio_encoder.open_as(acodec).unwrap();
         let audio_filter = audio_filter(&audio_encoder, av_info.timing.sample_rate).unwrap();
 
-        audio_encoder.set_rate(av_info.timing.sample_rate.round() as i32);
+        //audio_encoder.set_rate(av_info.timing.sample_rate.round() as i32);
         audio_output.set_parameters(&audio_encoder);
 
         octx.write_header().unwrap();
+        ffmpeg::format::context::output::dump(&octx, 0, None);
 
         let emu = MyEmulator {
             retro,
@@ -225,6 +230,25 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
         pin_emu.set_system_av_info(av_info);
         pin_emu
     }
+    
+    fn receive_and_write_packets(&mut self, encoder: EncoderToWriteFrom)
+    {
+        let stream_index = match encoder {
+            EncoderToWriteFrom::Video => 0,
+            EncoderToWriteFrom::Audio => 1,
+        };
+        let mut encoded_packet = ffmpeg::Packet::empty();
+        while let Ok(..) = match encoder {
+            EncoderToWriteFrom::Video => self.video_encoder.receive_packet(&mut encoded_packet),
+            EncoderToWriteFrom::Audio => self.audio_encoder.receive_packet(&mut encoded_packet),
+        } {
+            if encoded_packet.size() > 0 {
+                encoded_packet.set_stream(stream_index);
+                eprintln!("pk pts {:?} dts {:?}", encoded_packet.pts(), encoded_packet.dts());
+                encoded_packet.write_interleaved(&mut self.octx).unwrap(); // AAA
+            }
+        }
+    }
 
     pub fn run(&mut self, frame: i64) {
         self.frame += 1;
@@ -241,18 +265,9 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
             filtered_vframe.set_pts(Some(frame));
             self.video_encoder.send_frame(&filtered_vframe).unwrap();
 
-            let mut encoded_packet = ffmpeg::Packet::empty();
-            while let Ok(..) = self.video_encoder.receive_packet(&mut encoded_packet) {
-                if encoded_packet.size() > 0 {
-                    encoded_packet.set_stream(0); // use stream index...
-                    //encoded_packet.rescale_ts(Rational(1, 1), Rational(1, 60));
-                    encoded_packet.write_interleaved(&mut self.octx).unwrap(); // AAA
-                }
-                //encoded_packet.write_interleaved(&mut self.octx).unwrap(); // AAA
-            }
+            self.receive_and_write_packets(EncoderToWriteFrom::Video);
         }
 
-        eprintln!("Audio buffer length {}", self.audio_buf.len());
 
         let mut aframe = frame::Audio::new(
             format::Sample::I16(format::sample::Type::Packed),
@@ -261,8 +276,8 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
         );
         aframe.set_channels(2);
         aframe.set_rate(32040);
-        aframe.set_pts(Some(frame));
         let aplane: &mut [(i16, i16)] = aframe.plane_mut(0);
+        eprintln!("Audio buffer length {} -> {}", self.audio_buf.len(), aplane.len());
         aplane.copy_from_slice(self.audio_buf.as_ref());
         //eprintln!("src: {:?}, dest: {:?}", self.audio_buf, aplane);
         self.audio_buf.clear();
@@ -274,17 +289,15 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
             if self.audio_filter.get("in").unwrap().source().failed_requests() > 0 {
                 println!("🎥 failed to put filter input frame");
             }
+            //let faplane: &[f32] = filtered_aframe.plane(0);
+            //eprintln!("filtered: {:?}", faplane);
+            filtered_aframe.set_pts(Some(frame));
+            eprintln!("f pts {:?}", filtered_aframe.pts());
 
             filtered_aframe.set_pts(Some(frame));
             self.audio_encoder.send_frame(&aframe).unwrap();
             let mut encoded_packet = ffmpeg::Packet::empty();
-            while let Ok(..) = self.audio_encoder.receive_packet(&mut encoded_packet) {
-                if encoded_packet.size() > 0 {
-                    encoded_packet.set_stream(1);
-                    //encoded_packet.rescale_ts(Rational(1, 1), Rational(1, 60));
-                    encoded_packet.write_interleaved(&mut self.octx).unwrap(); // AAA
-                }
-            }
+            self.receive_and_write_packets(EncoderToWriteFrom::Audio);
         }
 
     }
@@ -306,6 +319,10 @@ static bool ffmpeg_init_config(struct ff_config_param *params,
     }
 
     pub fn end(&mut self) {
+        self.video_encoder.send_eof().unwrap();
+        self.receive_and_write_packets(EncoderToWriteFrom::Video);
+        self.audio_encoder.send_eof().unwrap();
+        self.receive_and_write_packets(EncoderToWriteFrom::Audio);
         self.octx.write_trailer().unwrap();
     }
 }
@@ -458,3 +475,8 @@ fn main() -> Fallible<()> {
     //octx.write_trailer().unwrap();
     Ok(())
 }
+
+enum EncoderToWriteFrom {
+    Video,
+    Audio,
+}