diff options
| -rw-r--r-- | libavformat/matroskaenc.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c index 0f74ad3fb8..98d47e5bef 100644 --- a/libavformat/matroskaenc.c +++ b/libavformat/matroskaenc.c @@ -288,7 +288,8 @@ static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid * be written at the location reserved for it. Otherwise, it is written * at the current location in the file. * - * @return The file offset where the seekhead was written. + * @return The file offset where the seekhead was written, + * -1 if an error occurred. */ static int64_t mkv_write_seekhead(ByteIOContext *pb, mkv_seekhead *seekhead) { @@ -299,7 +300,8 @@ static int64_t mkv_write_seekhead(ByteIOContext *pb, mkv_seekhead *seekhead) currentpos = url_ftell(pb); if (seekhead->reserved_size > 0) - url_fseek(pb, seekhead->filepos, SEEK_SET); + if (url_fseek(pb, seekhead->filepos, SEEK_SET) < 0) + return -1; metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size); for (i = 0; i < seekhead->num_entries; i++) { @@ -731,6 +733,9 @@ static int mkv_write_header(AVFormatContext *s) put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, 0); mkv->cluster_pts = 0; + if (url_is_streamed(s->pb)) + mkv_write_seekhead(pb, mkv->main_seekhead); + mkv->cues = mkv_start_cues(mkv->segment_offset); if (mkv->cues == NULL) return AVERROR(ENOMEM); @@ -896,8 +901,10 @@ static int mkv_write_trailer(AVFormatContext *s) ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES , cuespos); if (ret < 0) return ret; - ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_SEEKHEAD, second_seekhead); - if (ret < 0) return ret; + if (second_seekhead >= 0) { + ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_SEEKHEAD, second_seekhead); + if (ret < 0) return ret; + } mkv_write_seekhead(pb, mkv->main_seekhead); // update the duration |