[FFmpeg-trac] #7034(avformat:new): HLS does not demux entire clip if start_time > 0

[FFmpeg]

#7034: HLS does not demux entire clip if start_time > 0
----------------------------------+--------------------------------------
             Reporter:  ronag     |                     Type:  defect
               Status:  new       |                 Priority:  important
            Component:  avformat  |                  Version:  git-master
             Keywords:  hls http  |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Summary of the bug:

 The hls demuxer doesn't seem to play the entire file. From what i can see
 it seems to play "duration - start_time" time of the file. I've reproduced
 this on multiple different files.

 If I simply play the .ts file everything works fine. However, if I play
 the m3u8 file I seem to be missing "start_time" time in the end, i.e. the
 file is ~5.4s but it stops at ~4s.

 It seems to me that the demuxer seems to do "frame->pts += start_time" and
 then stop outputting packets once "frame->ts + start_time >= duration".
 However, "frame->pts" already includes start_time so somehow start_time
 gets added into "frame->pts" twice.

 How to reproduce:
 {{{
 cd ffmpeg
 npm i -g http-server
 http-server .
 ffplay -i http://localhost:8080/file/M6nmzk2FDeesWy.m3u8
 }}}

 {{{
 C:\Users\Boffins\Desktop\CasparCG 2.2.0>ffplay.exe -i
 http://localhost:8080/file/M6nmzk2FDeesWy.m3u8
 ffplay version N-90061-gfb580731c1 Copyright (c) 2003-2018 the FFmpeg
 developers
   built with gcc 7.2.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
 --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
 --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-
 libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
 --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-
 cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2
 --enable-avisynth
   libavutil      56.  7.101 / 56.  7.101
   libavcodec     58. 11.101 / 58. 11.101
   libavformat    58.  9.100 / 58.  9.100
   libavdevice    58.  1.100 / 58.  1.100
   libavfilter     7. 12.100 /  7. 12.100
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
 [hls,applehttp @ 000002343b33dd80] Opening
 'http://localhost:8080/file/M6nmzk2FDeesWy.ts' for reading
 [hls,applehttp @ 000002343b33dd80] Opening
 'http://localhost:8080/file/M6nmzk2FDeesWy.ts' for reading
 Input #0, hls,applehttp, from
 'http://localhost:8080/file/M6nmzk2FDeesWy.m3u8':
   Duration: 00:00:05.40, start: 1.458667, bitrate: 0 kb/s
   Program 0
     Metadata:
       variant_bitrate : 0
     Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
     Metadata:
       variant_bitrate : 0
     Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz,
 stereo, fltp
     Metadata:
       variant_bitrate : 0
    5.39 A-V: -5.723 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7034>
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