Commit b8423269 authored by Simon Thelen's avatar Simon Thelen Committed by Michael Niedermayer

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: 's avatarSimon Thelen <ffmpeg-dev@c-14.de>
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent 02064d6b
...@@ -46,8 +46,14 @@ static void webvtt_write_time(AVIOContext *pb, int64_t millisec) ...@@ -46,8 +46,14 @@ static void webvtt_write_time(AVIOContext *pb, int64_t millisec)
static int webvtt_write_header(AVFormatContext *ctx) static int webvtt_write_header(AVFormatContext *ctx)
{ {
AVStream *s = ctx->streams[0]; AVStream *s = ctx->streams[0];
AVCodecContext *avctx = ctx->streams[0]->codec;
AVIOContext *pb = ctx->pb; 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); avpriv_set_pts_info(s, 64, 1, 1000);
avio_printf(pb, "WEBVTT\n"); avio_printf(pb, "WEBVTT\n");
......
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