if (n <= 0)
break;
avio_write(output, buf, n);
+ if (output->error) {
+ av_strerror(output->error, errbuf, sizeof(errbuf));
+ fprintf(stderr, "Unable to write %s: %s\n", output_url, errbuf);
+ break;
+ }
stream_pos += n;
if (bps) {
avio_flush(output);