Can a byte-range in a m3u8 playlist be length 0?

Question

According to the HLS Pantos spec, a byte-range in a m3u8 playlist should look like #EXT-X-BYTERANGE:<n>[@<o>] where "n is a decimal-integer indicating the length of the sub-range in bytes".

However, this doesn't specify if "n" can be 0 or negative. This is a particular issue for caption playlists which may have a gap where no captions appear...

Is this a valid playlist?

#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-VERSION:4
#EXTINF:10.0,
#EXT-X-BYTERANGE:100@0
media.ts
#EXTINF:10.0,
#EXT-X-BYTERANGE:0@100
media.ts
#EXTINF:10.0,
#EXT-X-BYTERANGE:50@100
media.ts 

Answer 1

No, playlist entries with a byte-range length of 0 are NOT valid.