#3740(avfilter:new): drawtext drops backslashes
#3740: drawtext drops backslashes ----------------------------------+-------------------------------------- Reporter: Krieger | Type: defect Status: new | Priority: normal Component: avfilter | Version: git-master Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+-------------------------------------- Summary of the bug: How to reproduce: Create files for tests, with contents: /tmp/tmp0: {{{ testsrc,drawtext=text=TEST\\\\:fontsize=50:fontfile=/usr/share/fonts/corefonts/verdana.ttf:fontcolor=red }}} /tmp/tmp1: {{{ testsrc,drawtext=text=TEST\\\\TEST:fontsize=50:fontfile=/usr/share/fonts/corefonts/verdana.ttf:fontcolor=red }}} {{{ffplay -f lavfi -graph_file /tmp/tmp0 -i nullsrc}}} gives correct results - we have a backslash in the end of drawn text , but {{{ffplay -f lavfi -graph_file /tmp/tmp1 -i nullsrc}}} gives no backslash. The second variant with adding {{{expansion=none}}} works correctly. The uncut console output: {{{ ffplay version N-64175-g33ab751 Copyright (c) 2003-2014 the FFmpeg developers built on Jun 24 2014 17:05:19 with gcc 4.7.3 (Gentoo 4.7.3-r1 p1.4, pie-0.5.5) configuration: --enable-debug --extra-cflags='-O0 -g -ggdb' --enable-pic --disable-stripping --enable-openssl --enable-protocol=file --enable- protocol=pipe --enable-protocol=http --enable-protocol=https --enable- muxer=matroska --enable-muxer=mjpeg --enable-muxer=rtp --enable-muxer=mp4 --enable-demuxer=rtsp --enable-demuxer=matroska --enable-demuxer=mjpeg --enable-decoder=h264 --enable-decoder=mpeg4 --enable-decoder=mjpeg --enable-parser=h264 --enable-parser=mpeg4video --enable-parser=mjpeg --enable-encoder=mjpeg --enable-libfreetype libavutil 52. 90.100 / 52. 90.100 libavcodec 55. 68.100 / 55. 68.100 libavformat 55. 44.100 / 55. 44.100 libavdevice 55. 13.101 / 55. 13.101 libavfilter 4. 9.100 / 4. 9.100 libswscale 2. 6.100 / 2. 6.100 libswresample 0. 19.100 / 0. 19.100 Input #0, lavfi, from 'nullsrc': 0KB vq= 0KB sq= 0B f=0/0 Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc 6.24 M-V: 0.000 fd= 0 aq= 0KB vq= 1350KB sq= 0B f=0/0 }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/3740> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
#3740: drawtext drops backslashes ------------------------------------+------------------------------------ Reporter: Krieger | Owner: Type: defect | Status: new Priority: normal | Component: avfilter Version: git-master | Resolution: Keywords: drawtext | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ------------------------------------+------------------------------------ Changes (by cehoyos): * keywords: => drawtext -- Ticket URL: <https://trac.ffmpeg.org/ticket/3740#comment:1> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
#3740: drawtext drops backslashes ------------------------------------+------------------------------------ Reporter: Krieger | Owner: Type: defect | Status: new Priority: normal | Component: avfilter Version: git-master | Resolution: Keywords: drawtext | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ------------------------------------+------------------------------------ Comment (by Cigaes): Can you explain why you consider this a bug? You noticed that this is related to expansion: obviously, the backslash is doing its job of preventing the expansion of the next character. The fact that a trailing backslash is preserved instead of either being dropped or causing an error is an undocumented and unsupported corner case of the expansion code. You will notice that putting two backslashes in the {{{text}}} option gives the correct result in both cases. Of course, to put two backslashes in the {{{text}}} option, you need to put four backslashes in the {{{drawtext}}} argument string, and therefore eight in the graph description. Still no solution for the escaping madness, but it works reliably and predictably. -- Ticket URL: <https://trac.ffmpeg.org/ticket/3740#comment:2> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
#3740: drawtext drops backslashes --------------------------------------+------------------------------------ Reporter: Andrey Utkin | Owner: (none) Type: defect | Status: closed Priority: normal | Component: avfilter Version: git-master | Resolution: invalid Keywords: drawtext | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | --------------------------------------+------------------------------------ Changes (by Elon Musk): * status: new => closed * resolution: => invalid -- Ticket URL: <https://trac.ffmpeg.org/ticket/3740#comment:3> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
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