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Allow output formats without any streams.

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Required for future metadata format.

Originally committed as revision 26100 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Anton Khirnov
2010-12-27 07:46:44 +00:00
parent 18f1add31c
commit bb62d5c1f0
3 changed files with 4 additions and 3 deletions
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4
libavformat/utils.c
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@@ -2709,7 +2709,7 @@ int av_write_header(AVFormatContext *s)
AVStream *st;
// some sanity checks
if (s->nb_streams == 0) {
if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
av_log(s, AV_LOG_ERROR, "no streams\n");
return AVERROR(EINVAL);
}
@@ -2777,7 +2777,7 @@ int av_write_header(AVFormatContext *s)
#endif
/* set muxer identification string */
if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
}