Also check number of streams and give error message why muxing failed.
This prevents muxing unsupported codec with known and supported tag.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
- if (!enc->codec_tag)
+ if (s->nb_streams != 1) {
+ av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
+ }
+
+ enc->codec_tag = ff_codec_get_tag(codec_au_tags, enc->codec_id);
+ if (!enc->codec_tag) {
+ av_log(s, AV_LOG_ERROR, "unsupported codec\n");
+ return AVERROR(EINVAL);
+ }
ffio_wfourcc(pb, ".snd"); /* magic number */
avio_wb32(pb, AU_HEADER_SIZE); /* header size */