[FFmpeg-trac] #9143(avformat:new): libavformat:hlsenc split mpegts file failed if segment size >= INT_MAX/2

FFmpeg trac at avcodec.org
Mon Mar 8 05:09:20 EET 2021


#9143: libavformat:hlsenc split mpegts file failed if segment size >= INT_MAX/2
-------------------------------------+-------------------------------------
             Reporter:  hybase       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:  git-
             Keywords:  hlsenc       |  master
  mpegts                             |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 1) I always meet error when use '''ffmpeg 4.3.x''' to do hlsenc split big
 mpegts file if segment size > INT_MAX/2 because in '''dyn_buf_write()'''
 dyn_buffer size is limited with "if (new_size < d->pos || new_size >
 INT_MAX/2) {
         av_log(NULL, AV_LOG_ERROR, "[dyn_buf_write] !=== failed, out of
 range, max support buffer_size=%u, but new_size= %u, d->pos= %d, buf_size=
 %d\n", INT_MAX/2, new_size, d->pos, buf_size);
         return -1;
     }"
 2) it do well by old write file mechine in ffmpeg 4.1.x
 3) Will this question be fixed in future plan?

 Thanks!

 details:
 {{{
 ffmpeg -y -fflags +genpts -loglevel verbose -i
 /r2/vppftp/miyuezhuan_01.ts\
  -map 0:0 -c:v:0 copy -map 0:1 -c:a:0 copy\
  -hls_time 1296 /r2/output/myz_part.m3u8
 '''(note: segment size need > INT_MAX/2)'''
 ffmpeg version (4.3.x)
 built on gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/9143>
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