[FFmpeg-trac] #5881(undetermined:new): unable to mux dvb_teletext as webvtt hls : (incorrect codec parameters ?): Invalid argument

[FFmpeg]

#5881: unable to mux dvb_teletext as  webvtt hls : (incorrect codec parameters ?):
Invalid argument
-------------------------------------+-------------------------------------
             Reporter:  cbass        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  hls webvtt   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hi,

 I'm unable to mux dvb_teletext as webvtt hls (.m3u8).
 I always obtain the following error

 {{{(incorrect codec parameters ?): Invalid argument}}}


 It looks and issue of the hls mux as .webvtt output works well

 How to reproduce:
 To reproduce you DVB MPTS or SPTS stresm that include dvb_teletext pid
 and your ffmpeg must be build libvzbi

 '''--Doesn't works---'''

 ''command line''
 {{{
 /usr/local/bin/ffmpeg -v 9 -loglevel 99 -txt_format text -txt_page 801
 -txt_duration 4000 -i
 "udp://@239.180.15.15:2000?localaddr=192.168.0.201&fifo_size=1000000&overrun_nonfatal=1"
 -map 0:p:2000:3 -c:s:0 webvtt -f hls -hls_time 10 -hls_list_size 180
 -hls_flags delete_segments -hls_segment_filename /mnt/sub0_%05d.vtt
 /mnt/sub0.m3u8
 }}}

 ''output''
 {{{
 ffmpeg version N-81896-ga6bce3c Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
   configuration: --prefix=/home/scramatte/ffmpeg_build --pkg-config-
 flags=--static --extra-cflags=-I/home/scramatte/ffmpeg_build/include
 --extra-ldflags=-L/home/scramatte/ffmpeg_build/lib
 --bindir=/home/scramatte/bin --enable-gpl --enable-libfdk-aac --enable-
 libfreetype --enable-libmp3lame --enable-libvorbis --enable-libvpx
 --enable-libx264 --enable-libx265 --enable-libmfx --enable-libzvbi
 --enable-nonfree
   libavutil      55. 32.100 / 55. 32.100
   libavcodec     57. 60.101 / 57. 60.101
   libavformat    57. 51.102 / 57. 51.102
   libavdevice    57.  0.102 / 57.  0.102
   libavfilter     6. 63.100 /  6. 63.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  2.100 /  2.  2.100
   libpostproc    54.  0.100 / 54.  0.100
 }}}

 {{{
 Successfully opened the file.
 Parsing a group of options: output file /mnt/sub0.m3u8.
 Applying option map (set input stream mapping) with argument 0:p:29815:3.
 Applying option c:s:0 (codec name) with argument webvtt.
 Applying option f (force format) with argument hls.
 Successfully parsed a group of options.
 Opening an output file: /mnt/sub0.m3u8.
 Successfully opened the file.
 [libzvbi_teletextdec @ 0x2f35da0] page filter: 801
 [file @ 0x2f3d1a0] Setting default whitelist 'file,crypto'
 [file @ 0x2f30e60] Setting default whitelist 'file,crypto'
 [mpegts @ 0x334a940] No streams to mux were specified
 Output #0, hls, to '/mnt/sub0.m3u8':
   Metadata:
     encoder         : Lavf57.51.102
     Stream #0:0(spa,eng), 0, 1/1000: Subtitle: webvtt, 492x250
     Metadata:
       encoder         : Lavc57.60.101 webvtt
 Stream mapping:
   Stream #0:26 -> #0:0 (dvb_teletext (libzvbi_teletextdec) -> webvtt
 (native))
 Could not write header for output file #0 (incorrect codec parameters ?):
 Invalid argument
 [AVIOContext @ 0x2eef020] Statistics: 16653040 bytes read, 0 seeks
 }}}

 '''-- Works --'''
 ''command line''
 {{{
 /usr/local/bin/ffmpeg -txt_format text -txt_page 801 -txt_duration 4000 -i
 "udp://@239.180.15.15:2000?localaddr=192.168.0.201&fifo_size=1000000&overrun_nonfatal=1"
 -map 0:p:29815:3 -c:s:0 webvtt -f webvtt sub.webvtt
 }}}

 ''output''
 {{{
 File 'sub.webvtt' already exists. Overwrite ? [y/N] y
 Output #0, webvtt, to 'sub.webvtt':
   Metadata:
     encoder         : Lavf57.51.102
     Stream #0:0(spa,eng): Subtitle: webvtt
     Metadata:
       encoder         : Lavc57.60.101 webvtt
 Stream mapping:
   Stream #0:21 -> #0:0 (dvb_teletext (libzvbi_teletextdec) -> webvtt
 (native))
 Press [q] to stop, [?] for help
 size=       0kB time=00:00:02.96 bitrate=   0.3kbits/s speed=1.17x
 video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 109.259262%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5881>
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