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| author | Limin Wang <lance.lmwang@gmail.com> | 2020-03-29 14:13:44 +0300 |
|---|---|---|
| committer | Steven Liu <lq@chinaffmpeg.org> | 2020-04-08 18:02:41 +0300 |
| commit | cd8c5e89ba4bb9160a1a42c1d612a3f2b9085a6a (patch) | |
| tree | c3cb36e99806be92a57637793d33b627f2e42d66 /doc/muxers.texi | |
| parent | 73dc87c4f07f82b9756b3bbf4d4e9f18e46ef2e3 (diff) | |
avformat: add subtitle support in master playlist m3u8
Test with the following command for the webvtt subtitle:
$ ./ffmpeg -y -i input_with_subtitle.mkv \
-b:v:0 5250k -c:v h264 -pix_fmt yuv420p -profile:v main -level 4.1 \
-b:a:0 256k \
-c:s webvtt -c:a mp2 -ar 48000 -ac 2 -map 0:v -map 0:a:0 -map 0:s:0 \
-f hls -var_stream_map "v:0,a:0,s:0,sgroup:subtitle" \
-master_pl_name master.m3u8 -t 300 -hls_time 10 -hls_init_time 4 -hls_list_size \
10 -master_pl_publish_rate 10 -hls_flags \
delete_segments+discont_start+split_by_time ./tmp/video.m3u8
Check the master m3u8:
$ cat tmp/master.m3u8
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subtitle",NAME="subtitle_0",DEFAULT=YES,URI="video_vtt.m3u8"
#EXT-X-STREAM-INF:BANDWIDTH=6056600,RESOLUTION=1280x720,CODECS="avc1.4d4829,mp4a.40.33",SUBTITLES="subtitle"
video.m3u8
Check the result by convert to mkv:
$ ./ffmpeg -strict experimental -i ./tmp/master.m3u8 -c:v copy -c:a mp2 -c:s srt ./test.mkv
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Diffstat (limited to 'doc/muxers.texi')
| -rw-r--r-- | doc/muxers.texi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/muxers.texi b/doc/muxers.texi index 3be1c89416..4b6ffaaf58 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -1062,6 +1062,21 @@ have and language is named ENG, the other audio language is named CHN. By default, a single hls variant containing all the encoded streams is created. +@example +ffmpeg -y -i input_with_subtitle.mkv \ + -b:v:0 5250k -c:v h264 -pix_fmt yuv420p -profile:v main -level 4.1 \ + -b:a:0 256k \ + -c:s webvtt -c:a mp2 -ar 48000 -ac 2 -map 0:v -map 0:a:0 -map 0:s:0 \ + -f hls -var_stream_map "v:0,a:0,s:0,sgroup:subtitle" \ + -master_pl_name master.m3u8 -t 300 -hls_time 10 -hls_init_time 4 -hls_list_size \ + 10 -master_pl_publish_rate 10 -hls_flags \ + delete_segments+discont_start+split_by_time ./tmp/video.m3u8 +@end example + +This example adds @code{#EXT-X-MEDIA} tag with @code{TYPE=SUBTITLES} in +the master playlist with webvtt subtitle group name 'subtitle'. Please make sure +the input file has one text subtitle stream at least. + @item cc_stream_map Map string which specifies different closed captions groups and their attributes. The closed captions stream groups are separated by space. |