[FFmpeg-trac] #10077(avformat:new): ffmpeg : #EXT-X-INDEPENDENT-SEGMENTS not added when audio file

FFmpeg trac at avcodec.org
Sat Nov 26 19:43:20 EET 2022 

#10077: ffmpeg : #EXT-X-INDEPENDENT-SEGMENTS not added when audio file
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             Reporter:  xavierlaff  |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  HLS         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Changes (by xavierlaff):

 * version:  unspecified => git-master


Old description:

> I noticed in the code that only when the file contains video "#EXT-X
> -INDEPENDENT-SEGMENTS" is appended with the hls_flag Independent_segments
> argument. (hlsenc.c file, line 1601)
>
> I think it's a mistake because in the HLS rfc nothing indicates that only
> the video is concerned
>
> '''Reproduce:'''
> ffmpeg -i audio_file.mp4 -codec copy -f hls '''-hls_flags
> independent_segments''' -master_pl_name master.m3u8 -hls_segment_type
> mpegts -hls_playlist_type vod "playlist.m3u8"

New description:

 I noticed in the code that only when the file contains video "#EXT-X
 -INDEPENDENT-SEGMENTS" is appended with the hls_flag Independent_segments
 argument. (hlsenc.c file, line 1601)

 I think it's a mistake because in the HLS rfc nothing indicates that only
 the video is concerned

 '''Reproduce:'''
 ffmpeg -i audio_file.mp4 -codec copy -f hls '''-hls_flags
 independent_segments''' -master_pl_name master.m3u8 -hls_segment_type
 mpegts -hls_playlist_type vod "playlist.m3u8"

 '''Output:'''
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'audio_file.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42isom
     creation_time   : 2022-11-26T09:12:11.000000Z
   Duration: 00:10:00.13, start: 0.000000, bitrate: 174 kb/s
   Stream #0:0[0x1](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 61 kb/s (default)
     Metadata:
       creation_time   : 2022-11-26T09:12:11.000000Z
       vendor_id       : [0][0][0][0]
 [mpegts @ 000001b5ec13d9c0] frame size not set
 Output #0, hls, to 'playlist.m3u8':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42isom
     encoder         : Lavf59.27.100
   Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
 fltp, 61 kb/s (default)
     Metadata:
       creation_time   : 2022-11-26T09:12:11.000000Z
       vendor_id       : [0][0][0][0]
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
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 [hls @ 000001b5ec138dc0] Opening 'playlist284.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist285.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist286.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist287.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist288.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist289.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist290.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist291.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist292.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist293.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist294.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist295.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist296.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist297.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist298.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist299.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'playlist300.ts' for writing
 [hls @ 000001b5ec138dc0] Opening 'master.m3u8' for writing
 size=N/A time=00:10:00.12 bitrate=N/A speed=1.37e+03x
 video:0kB audio:4498kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown

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Ticket URL: <https://trac.ffmpeg.org/ticket/10077#comment:2>
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