increase the nb_samples because some large video may overflow.

@@ -353,10 +353,9 @@ int SrsCodecSample::add_sample_unit(char* bytes, int size)
 {
     int ret = ERROR_SUCCESS;
     
-    if (nb_sample_units >= SRS_SRS_MAX_CODEC_SAMPLE) {
+    if (nb_sample_units >= SRS_MAX_CODEC_SAMPLE) {
         ret = ERROR_HLS_DECODE_ERROR;
-        srs_error("hls decode samples error, "
-            "exceed the max count: %d, ret=%d", SRS_SRS_MAX_CODEC_SAMPLE, ret);
+        srs_error("avc exceed samples count, max=%d, video=%d. ret=%d", SRS_MAX_CODEC_SAMPLE, is_video, ret);
         return ret;
     }
     

@@ -243,9 +243,12 @@ extern int flv_sample_rates[];
 */
 extern int aac_sample_rates[];
 
-#define SRS_SRS_MAX_CODEC_SAMPLE 128
+// The impossible aac sample rate index.
 #define SRS_AAC_SAMPLE_RATE_UNSET 15
 
+// The max number of NALUs in a video, or aac frame in audio packet.
+#define SRS_MAX_CODEC_SAMPLE 256
+
 /**
 * the FLV/RTMP supported audio sample size.
 * Size of each audio sample. This parameter only pertains to
@@ -368,7 +371,7 @@ public:
     * where avc/h264 video packet may contains multiple buffer.
     */
     int nb_sample_units;
-    SrsCodecSampleUnit sample_units[SRS_SRS_MAX_CODEC_SAMPLE];
+    SrsCodecSampleUnit sample_units[SRS_MAX_CODEC_SAMPLE];
 public:
     /**
     * whether the sample is video sample which demux from video packet.