Segmentation fault (core dumped) when trying to generate hls output from .mp4 file

[ffmpeg.golden]

Summary of the bug:

I have a vod file and related caption file. I am trying to package them as a live HLS stream with following command. It fails with error Segmentation fault. This should be working fine and produce hls output on disk. This is working fine in version 4.4.1 so something along the line broke it in 5.0.

How to reproduce:

ffmpeg -re -i keynote.mp4 -i english.vtt -c copy \
-map 1:s:0 -c:s webvtt \
-filter_complex "[0:v]split=3[v1][v2][v3]; [v1]copy[v1out]; [v2]scale=w=1280:h=720[v2out]; [v3]scale=w=640:h=360[v3out]" \
-map [v1out] -c:v:0 libx264 -x264-params "nal-hrd=cbr:force-cfr=1"  -b:v:0 2M -maxrate:v:0 2M -minrate:v:0 2M -bufsize:v:0 10M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 \
-map [v2out] -c:v:1 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" -b:v:1 1M -maxrate:v:1 1M -minrate:v:1 1M -bufsize:v:1 1M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 \
-map [v3out] -c:v:2 libx264 -x264-params "nal-hrd=cbr:force-cfr=1"  -b:v:2 500K -maxrate:v:2 500K -minrate:v:2 500K -bufsize:v:2 500K -preset fast -g 48 -sc_threshold 0 -keyint_min 48 \
-map a:0 -c:a:0 aac -b:a:0 96k -ac 2 -map a:0 -c:a:1 aac -b:a:1 96k -ac 2 -map a:0 -c:a:2 aac -b:a:2 48k -ac 2 \
-avoid_negative_ts 1 -f hls -hls_time 6 -hls_list_size 10 \
-hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename stream_%v_data%02d.ts -master_pl_name master.m3u8 \
-var_stream_map "v:0,a:0,s:0,sgroup:subtitle v:1,a:1 v:2,a:2" \
stream_%v.m3u8

Output:

ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 10 (GCC)
  configuration: --prefix=/opt/ --libdir=/opt/lib64 --disable-debug --enable-gpl --enable-libx264 --enable-libmp3lame --enable-hardcoded-tables
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'keynote.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2023-05-14T00:30:07.000000Z
  Duration: 02:05:19.83, start: 0.000000, bitrate: 884 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 753 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
    Metadata:
      creation_time   : 2023-05-14T00:30:07.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 05/13/2023.
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2023-05-14T00:30:07.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 05/13/2023.
      vendor_id       : [0][0][0][0]
Input #1, webvtt, from 'english.vtt':
  Duration: N/A, bitrate: N/A
  Stream #1:0: Subtitle: webvtt
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 0, only the last option '-c:s webvtt' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 1, only the last option '-c:v:0 libx264' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 2, only the last option '-c:v:1 libx264' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 3, only the last option '-c:v:2 libx264' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 4, only the last option '-c:a:0 aac' will be used.
Multiple -ac options specified for stream 4, only the last option '-ac 2' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 5, only the last option '-c:a:1 aac' will be used.
Multiple -ac options specified for stream 5, only the last option '-ac 2' will be used.
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 6, only the last option '-c:a:2 aac' will be used.
Multiple -ac options specified for stream 6, only the last option '-ac 2' will be used.
Stream mapping:
  Stream #0:0 (h264) -> split:default (graph 0)
  Stream #1:0 -> #0:0 (webvtt (native) -> webvtt (native))
  copy:default (graph 0) -> Stream #0:1 (libx264)
  scale:default (graph 0) -> Stream #0:2 (libx264)
  scale:default (graph 0) -> Stream #0:3 (libx264)
  Stream #0:1 -> #0:4 (aac (native) -> aac (native))
  Stream #0:1 -> #0:5 (aac (native) -> aac (native))
  Stream #0:1 -> #0:6 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x3efe000] using SAR=1/1
[libx264 @ 0x3efe000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x3efe000] profile High, level 3.1
[libx264 @ 0x3efe000] 264 - core 152 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=22 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=48 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=30 rc=cbr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=2000 vbv_bufsize=10000 nal_hrd=cbr filler=1 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x3f00640] using SAR=1/1
[libx264 @ 0x3f00640] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x3f00640] profile High, level 3.1
[libx264 @ 0x3f00640] 264 - core 152 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=22 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=48 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=30 rc=cbr mbtree=1 bitrate=1000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1000 vbv_bufsize=1000 nal_hrd=cbr filler=1 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x3f02540] using SAR=1/1
[libx264 @ 0x3f02540] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x3f02540] profile High, level 3.0
[libx264 @ 0x3f02540] 264 - core 152 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=11 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=48 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=30 rc=cbr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=500 vbv_bufsize=500 nal_hrd=cbr filler=1 ip_ratio=1.40 aq=1:1.00
[hls @ 0x3ef9400] Opening 'stream_00.vtt' for writing
Output #0, hls, to 'stream_%v.m3u8':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf60.3.100
  Stream #0:0: Subtitle: webvtt
    Metadata:
      encoder         : Lavc60.3.100 webvtt
  Stream #0:1: Video: h264, yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 2000 kb/s, 29.97 fps, 90k tbn (default)
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 2000000/0/2000000 buffer size: 10000000 vbv_delay: N/A
  Stream #0:2: Video: h264, yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1000 kb/s, 29.97 fps, 90k tbn
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 1000000/0/1000000 buffer size: 1000000 vbv_delay: N/A
  Stream #0:3: Video: h264, yuv420p(tv, bt709, progressive), 640x360 [SAR 1:1 DAR 16:9], q=2-31, 500 kb/s, 29.97 fps, 90k tbn
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 500000/0/500000 buffer size: 500000 vbv_delay: N/A
  Stream #0:4(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 96 kb/s (default)
    Metadata:
      creation_time   : 2023-05-14T00:30:07.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 05/13/2023.
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.3.100 aac
  Stream #0:5(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 96 kb/s (default)
    Metadata:
      creation_time   : 2023-05-14T00:30:07.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 05/13/2023.
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.3.100 aac
  Stream #0:6(eng): Audio: aac (LC), 44100 Hz, stereo, fltp, 48 kb/s (default)
    Metadata:
      creation_time   : 2023-05-14T00:30:07.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 05/13/2023.
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.3.100 aac
Segmentation fault (core dumped)q=21.0 size=N/A time=00:00:04.59 bitrate=N/A speed=2.29x

Source Files:

Download Google IO 2023 youtube video and subtitles using following.
​https://ssyoutube.com/en111ZX/youtube-video-downloader
​https://downsub.com/

[piusbnsl]

I am getting the same error. Following is the command I used -

ffmpeg \
-report \
-i fireship-rust.mp4 \
-i fireship-rust.vtt \
-filter_complex "[0:v]scale=1280:720[vyuv];[vyuv]split=2[v0][vtemp1];[vtemp1]scale=w=960:h=540[v1];" \
-map "[v0]" -map "[v1]" -map 0:a -map 0:a -map 1:s -map 1:s \
-b:v:0 3500k -maxrate:v:0 3500k -bufsize:v:0 3500k \
-b:v:1 1690k -maxrate:v:1 1690k -bufsize:v:1 1690k \
-b:a 128k \
-c:s webvtt \
-c:v libx264 \
-c:a aac \
-f hls \
-var_stream_map "v:0,a:0,s:0,sgroup:subtitle v:1,a:1,s:1,sgroup:subtitle" \
-master_pl_name master.m3u8 \
stream_%v/stream.m3u8

I am getting similar logs as above. I have pasted the whole report here - ​https://pastebin.com/mfqL24EZ

I have tried multiple variations of the above command and am not able to get the subtitles working with multiple streams. It works fine for single stream -

ffmpeg \
-i fireship-rust.mp4 \
-i fireship-rust.vtt \
-filter_complex "[0:v]scale=1280:720[v0];" \
-map "[v0]" -map 0:a -map 1:s \
-b:v:0 3500k -maxrate:v:0 3500k -bufsize:v:0 3500k \
-b:a 128k \
-c:s webvtt \
-c:v libx264 \
-c:a aac \
-f hls \
-var_stream_map "v:0,a:0,s:0,sgroup:subtitle" \
-master_pl_name master.m3u8 \
stream_%v/stream.m3u8

or

ffmpeg \
-i fireship-rust.mp4 \
-i fireship-rust.vtt \
-filter_complex "[0:v]scale=1280:720[vyuv];[vyuv]split=2[v0][vtemp1];[vtemp1]scale=w=960:h=540[v1];" \
-map "[v0]" -map 0:a -map 1:s \
-b:a 128k \
-c:s webvtt \
-c:v libx264 \
-c:a aac \
-f hls \
-var_stream_map "v:0,a:0,s:0,sgroup:subtitle" \
-master_pl_name master.m3u8 \
-hls_time 2 \
-hls_segment_filename stream_%v/data%03d.ts \
stream_%v/stream.m3u8 \
-map "[v1]" -map 0:a \
output.mkv

Let me know if you need my help anyhow debugging this.

[ffmpeg.golden]

checking of any progress here