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avformat/hlsenc: Respect append_list flag in subtitle

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Ensure that when the `-hls_flags append_list` option is set,
that *.vtt files in stream_vtt.m3u8 are correctly updated.
This fixes https://trac.ffmpeg.org/ticket/11208

Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
This commit is contained in:
Jonathan Baecker 2024-09-30 21:40:20 +02:00 committed by Steven Liu
parent de976eaf30
commit 425c323420
1 changed files with 30 additions and 0 deletions
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30
libavformat/hlsenc.c
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@ -1202,6 +1202,22 @@ static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls,
return 0;
}
static int extract_segment_number(const char *filename) {
const char *dot = strrchr(filename, '.');
const char *num_start = dot - 1;
while (num_start > filename && *num_start >= '0' && *num_start <= '9') {
num_start--;
}
num_start++;
if (num_start == dot)
return -1;
return atoi(num_start);
}
static int parse_playlist(AVFormatContext *s, const char *url, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
@ -1295,6 +1311,20 @@ static int parse_playlist(AVFormatContext *s, const char *url, VariantStream *vs
goto fail;
}
ff_format_set_url(vs->avf, new_file);
if (vs->has_subtitle) {
int vtt_index = extract_segment_number(line);
const char *vtt_basename = av_basename(vs->vtt_basename);
int len = strlen(vtt_basename) + 11;
char *vtt_file = av_mallocz(len);
if (!vtt_file) {
ret = AVERROR(ENOMEM);
goto fail;
}
snprintf(vtt_file, len, vtt_basename, vtt_index);
ff_format_set_url(vs->vtt_avf, vtt_file);
}
is_segment = 0;
new_start_pos = avio_tell(vs->avf->pb);
vs->size = new_start_pos - vs->start_pos;