Merge pull request #1502 from kaltura/hls-clip-id

Add clip id var

1.32

- support for newer ffmpeg versions
- support thumb capture in AV1 codec
- fallback to ffmpeg builtin aac lib, if libfdk_aac is not available

1.31

- hls: support av1
- support dolby vision
- use new ffmpeg channel layout api (ffmpeg 5.x)
- allow subtitle tracks in audio-only streams
- fixes for ARM cpus

1.30

- support nginx 1.23.0
- make max_frame_count configurable
- output version as a label in prom format status
- bug fixes

1.29

- support more than 32 tracks per media type
- hls: support playlistType event
- hls: rename SAMPLE-AES-CENC -> SAMPLE-AES-CTR
- mp4: parse udta stream names
- support new ffmpeg versions

1.28

add the ability to set a source type per source
live-hls: fix webvtt caption sync
hls: support flac audio codec
hls: support CLOSED-CAPTIONS in master manifest
hls: add vod_hls_mpegts_align_pts flag
fix av1 codec name
support unknown language codes in mapping json
add persistent proxy conf
add prefetcher proxy conf
status: support prometheus format

1.27

- support av1 codec
- fix eac3 signalling

1.26

support encryption-at-rest for subtitles
live window clipping fix
dash - support smpte subtitles
hls - support AVERAGE-BANDWIDTH attribute

1.25

add vod_force_sequence_index directive
json parser - support \uxxxx
increase the max sequence ids to 4
add additional language codes
hls - output the sequence id in the id3 json
hls - avoid returning LANGUAGE for non multi audio

encryption-at-rest thumbnail fix
fix compilation without openssl/libavfilter
fix unmuxed hls with multi video codecs

1.24

- support ffmpeg 4
- support iconv 1.15
- mp4 cenc - encrypt only vcl nal units
- playlist php sample - refactor live logic
- hls - add VIDEO-RANGE attribute to master m3u8
- support utf16be encoded srt
- support track selection in progressive download
- support senc atom under trak
- support ARM architecture
- add ability to pass thumb offsets relative to start time