Check the return of audio and video encoders.

Originally committed as revision 16538 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -684,6 +684,10 @@ static void do_audio_out(AVFormatContext *s,
 
             ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
                                        (short *)audio_buf);
+            if (ret < 0) {
+                fprintf(stderr, "Audio encoding failed\n");
+                av_exit(1);
+            }
             audio_size += ret;
             pkt.stream_index= ost->index;
             pkt.data= audio_out;
@@ -711,6 +715,10 @@ static void do_audio_out(AVFormatContext *s,
         //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
         ret = avcodec_encode_audio(enc, audio_out, size_out,
                                    (short *)buftmp);
+        if (ret < 0) {
+            fprintf(stderr, "Audio encoding failed\n");
+            av_exit(1);
+        }
         audio_size += ret;
         pkt.stream_index= ost->index;
         pkt.data= audio_out;
@@ -1456,11 +1464,19 @@ static int output_packet(AVInputStream *ist, int ist_index,
                             if(ret <= 0) {
                                 ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
                             }
+                            if (ret < 0) {
+                                fprintf(stderr, "Audio encoding failed\n");
+                                av_exit(1);
+                            }
                             audio_size += ret;
                             pkt.flags |= PKT_FLAG_KEY;
                             break;
                         case CODEC_TYPE_VIDEO:
                             ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
+                            if (ret < 0) {
+                                fprintf(stderr, "Video encoding failed\n");
+                                av_exit(1);
+                            }
                             video_size += ret;
                             if(enc->coded_frame && enc->coded_frame->key_frame)
                                 pkt.flags |= PKT_FLAG_KEY;