[FFmpeg-trac] #4945(undetermined:new): potential regression on drawtext timecode

[FFmpeg]

#4945: potential regression on drawtext timecode
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  lorenzo.angeli                     |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  important    |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  crash        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by lorenzo.angeli):

 Hi , sorry for the delay.

 the external x264 is not needed and I can reproduce with the other flags.
 Here is a command which uses both and segfault.

 {{{

 ./ffmpeg -y -r 25.0 -f lavfi -i testsrc -vcodec mpeg4 -qscale 2
 -filter_complex "[0:v]null,scale=1920:1080,
 drawtext=timecode=\'00:00:00:00\':r=25.0:fontcolor=white at 1:fontsize=28:x=50:y=50-text_h[clip];[clip]scale=1920:1080,
 fps=25.0, setdar=16:9[v]" -map [v] -v debug
 /home/efesto/Desktop/foobar.mov

 ffmpeg version N-50577-g777b305-static http://johnvansickle.com/ffmpeg/
 Copyright (c) 2000-2015 the FFmpeg developers
   built with gcc 4.9.3 (Debian 4.9.3-5)
   configuration: --enable-gpl --enable-version3 --disable-shared
 --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-
 libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-
 libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig
 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
 gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls
 --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi
 --cc=gcc-4.9
   libavutil      55.  4.100 / 55.  4.100
   libavcodec     57.  7.100 / 57.  7.100
   libavformat    57.  8.100 / 57.  8.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 11.100 /  6. 11.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.100 /  2.  0.100
   libpostproc    54.  0.100 / 54.  0.100
 Splitting the commandline.
 Reading option '-y' ... matched as option 'y' (overwrite output files)
 with argument '1'.
 Reading option '-r' ... matched as option 'r' (set frame rate (Hz value,
 fraction or abbreviation)) with argument '25.0'.
 Reading option '-f' ... matched as option 'f' (force format) with argument
 'lavfi'.
 Reading option '-i' ... matched as input file with argument 'testsrc'.
 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
 ('copy' to copy stream)) with argument 'mpeg4'.
 Reading option '-qscale' ... matched as option 'qscale' (use fixed quality
 scale (VBR)) with argument '2'.
 Reading option '-filter_complex' ... matched as option 'filter_complex'
 (create a complex filtergraph) with argument '[0:v]null,scale=1920:1080,
 drawtext=timecode=\'00:00:00:00\':r=25.0:fontcolor=white at 1:fontsize=28:x=50:y=50-text_h[clip];[clip]scale=1920:1080,
 fps=25.0, setdar=16:9[v]'.
 Reading option '-map' ... matched as option 'map' (set input stream
 mapping) with argument '[v]'.
 Reading option '-v' ... matched as option 'v' (set logging level) with
 argument 'debug'.
 Reading option '/home/efesto/Desktop/foobar.mov' ... matched as output
 file.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option y (overwrite output files) with argument 1.
 Applying option filter_complex (create a complex filtergraph) with
 argument [0:v]null,scale=1920:1080,
 drawtext=timecode=\'00:00:00:00\':r=25.0:fontcolor=white at 1:fontsize=28:x=50:y=50-text_h[clip];[clip]scale=1920:1080,
 fps=25.0, setdar=16:9[v].
 Applying option v (set logging level) with argument debug.
 Successfully parsed a group of options.
 Parsing a group of options: input file testsrc.
 Applying option r (set frame rate (Hz value, fraction or abbreviation))
 with argument 25.0.
 Applying option f (force format) with argument lavfi.
 Successfully parsed a group of options.
 Opening an input file: testsrc.
 detected 8 logical cores
 [Parsed_testsrc_0 @ 0x36311c0] size:320x240 rate:25/1 duration:-1.000000
 sar:1/1
 [AVFilterGraph @ 0x362fda0] query_formats: 2 queried, 1 merged, 0 already
 done, 0 delayed
 [lavfi @ 0x362f6c0] All info found
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0, 1, 1/25: Video: rawvideo, 1 reference frame (RGB[24] /
 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 1/25, 25 tbr, 25 tbn, 25
 tbc
 Successfully opened the file.
 [Parsed_scale_1 @ 0x3634280] Setting 'w' to value '1920'
 [Parsed_scale_1 @ 0x3634280] Setting 'h' to value '1080'
 [Parsed_scale_1 @ 0x3634280] w:1920 h:1080 flags:'bilinear' interl:0
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'timecode' to value '00:00:00:00'
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'r' to value '25.0'
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'fontcolor' to value 'white at 1'
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'fontsize' to value '28'
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'x' to value '50'
 [Parsed_drawtext_2 @ 0x3634c00] Setting 'y' to value '50-text_h'
 Segmentation fault

 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4945#comment:3>
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