diff --git a/doc/muxers.texi b/doc/muxers.texi index 7ca6409373..7a27960885 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -806,6 +806,11 @@ is 1 second. A value of 0 will fill all segments, making pages as large as possible. A value of 1 will effectively use 1 packet-per-page in most situations, giving a small seek granularity at the cost of additional container overhead. +@item -serial_offset @var{value} +Serial value from which to set the streams serial number. +Setting it to different and sufficiently large values ensures that the produced +ogg files can be safely chained. + @end table @anchor{segment} diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c index 3929311b49..13f2cc7df8 100644 --- a/libavformat/oggenc.c +++ b/libavformat/oggenc.c @@ -71,12 +71,15 @@ typedef struct { OGGPageList *page_list; int pref_size; ///< preferred page size (0 => fill all segments) int64_t pref_duration; ///< preferred page duration (0 => fill all segments) + int serial_offset; } OGGContext; #define OFFSET(x) offsetof(OGGContext, x) #define PARAM AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { + { "serial_offset", "serial number offset", + OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM }, { "oggpagesize", "Set preferred Ogg page size.", offsetof(OGGContext, pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_PARAM}, { "pagesize", "preferred page size in bytes (deprecated)", @@ -430,7 +433,7 @@ static int ogg_write_header(AVFormatContext *s) for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; - unsigned serial_num = i; + unsigned serial_num = i + ogg->serial_offset; if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { if (st->codec->codec_id == AV_CODEC_ID_OPUS)