lavf/daudenc: clarify error messages

libavformat/daudenc.c

@@ -25,8 +25,21 @@
 static int daud_init(struct AVFormatContext *s)
 {
     AVCodecParameters *par = s->streams[0]->codecpar;
-    if (par->ch_layout.nb_channels != 6 || par->sample_rate != 96000)
+
+    if (par->ch_layout.nb_channels != 6) {
+        av_log(s, AV_LOG_ERROR,
+               "Invalid number of channels %d, must be exactly 6\n",
+               par->ch_layout.nb_channels);
+        return AVERROR(EINVAL);
+    }
+
+    if (par->sample_rate != 96000) {
+        av_log(s, AV_LOG_ERROR,
+               "Invalid sample rate %d, must be 96000\n",
+               par->sample_rate);
         return AVERROR(EINVAL);
+    }
+
     return 0;
 }
 
@@ -34,7 +47,8 @@ static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     if (pkt->size > 65535) {
         av_log(s, AV_LOG_ERROR,
-               "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
+               "Packet size %d too large for s302m, must be <= 65535.\n",
+               pkt->size);
         return AVERROR_INVALIDDATA;
     }
     avio_wb16(s->pb, pkt->size);