WIP: attempt to fix #702

Write the whole first data packet along with the config packet in the
codec extradata to write the header.

app/src/recorder.c

@@ -219,22 +219,13 @@ recorder_rescale_packet(struct recorder *recorder, AVPacket *packet) {
 
 bool
 recorder_write(struct recorder *recorder, AVPacket *packet) {
+    SDL_assert(packet->pts != AV_NOPTS_VALUE);
     if (!recorder->header_written) {
-        if (packet->pts != AV_NOPTS_VALUE) {
-            LOGE("The first packet is not a config packet");
-            return false;
-        }
         bool ok = recorder_write_header(recorder, packet);
         if (!ok) {
             return false;
         }
         recorder->header_written = true;
-        return true;
-    }
-
-    if (packet->pts == AV_NOPTS_VALUE) {
-        // ignore config packets
-        return true;
     }
 
     recorder_rescale_packet(recorder, packet);

app/src/stream.c

@@ -69,15 +69,6 @@ notify_stopped(void) {
     SDL_PushEvent(&stop_event);
 }
 
-static bool
-process_config_packet(struct stream *stream, AVPacket *packet) {
-    if (stream->recorder && !recorder_push(stream->recorder, packet)) {
-        LOGE("Could not send config packet to recorder");
-        return false;
-    }
-    return true;
-}
-
 static bool
 process_frame(struct stream *stream, AVPacket *packet) {
     if (stream->decoder && !decoder_push(stream->decoder, packet)) {
@@ -157,13 +148,7 @@ stream_push_packet(struct stream *stream, AVPacket *packet) {
         }
     }
 
-    if (is_config) {
-        // config packet
-        bool ok = process_config_packet(stream, packet);
-        if (!ok) {
-            return false;
-        }
-    } else {
+    if (!is_config) {
         // data packet
         bool ok = stream_parse(stream, packet);