diff options
| author | Simon Thelen | 2015-09-11 21:49:07 +0200 |
|---|---|---|
| committer | Michael Niedermayer | 2015-09-12 02:17:41 +0200 |
| commit | b84232694ef0c6897e82b52326c9ea4027c69ec4 (patch) | |
| tree | 6fd1aa26b9a47858e730cd345395322ea585fbc1 | |
| parent | 02064d6b7bb93d7e85309fb48ee1d2b25f59e452 (diff) | |
lavf/webvttenc: Require webvtt file to contain exactly one WebVTT stream.
Not requiring this can end up producing hilariously broken files
together with -c:s copy (e.g. a webvtt file containing binary subtitle data).
Signed-off-by: Simon Thelen <ffmpeg-dev@c-14.de>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/webvttenc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavformat/webvttenc.c b/libavformat/webvttenc.c index b93993d55c..c386538718 100644 --- a/libavformat/webvttenc.c +++ b/libavformat/webvttenc.c @@ -46,8 +46,14 @@ static void webvtt_write_time(AVIOContext *pb, int64_t millisec) static int webvtt_write_header(AVFormatContext *ctx) { AVStream *s = ctx->streams[0]; + AVCodecContext *avctx = ctx->streams[0]->codec; AVIOContext *pb = ctx->pb; + if (ctx->nb_streams != 1 || avctx->codec_id != AV_CODEC_ID_WEBVTT) { + av_log(ctx, AV_LOG_ERROR, "Exactly one WebVTT stream is needed.\n"); + return AVERROR(EINVAL); + } + avpriv_set_pts_info(s, 64, 1, 1000); avio_printf(pb, "WEBVTT\n"); |