diff options
| -rw-r--r-- | doc/ffmpeg.texi | 3 | ||||
| -rw-r--r-- | ffmpeg.h | 2 | ||||
| -rw-r--r-- | ffmpeg_opt.c | 12 |
3 files changed, 16 insertions, 1 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index d52df9bb8a..9848e0dd86 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -681,6 +681,9 @@ Note that this option will delay the output of all data until the next subtitle packet is decoded: it may increase memory consumption and latency a lot. +@item -canvas_size @var{size} +Set the size of the canvas used to render subtitles. + @end table @section Advanced options @@ -169,6 +169,8 @@ typedef struct OptionsContext { int nb_reinit_filters; SpecifierOpt *fix_sub_duration; int nb_fix_sub_duration; + SpecifierOpt *canvas_sizes; + int nb_canvas_sizes; SpecifierOpt *pass; int nb_pass; SpecifierOpt *passlogfiles; diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c index 2d890cfda3..ebaf88d517 100644 --- a/ffmpeg_opt.c +++ b/ffmpeg_opt.c @@ -617,11 +617,19 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic) break; case AVMEDIA_TYPE_DATA: - case AVMEDIA_TYPE_SUBTITLE: + case AVMEDIA_TYPE_SUBTITLE: { + char *canvas_size = NULL; if(!ist->dec) ist->dec = avcodec_find_decoder(dec->codec_id); MATCH_PER_STREAM_OPT(fix_sub_duration, i, ist->fix_sub_duration, ic, st); + MATCH_PER_STREAM_OPT(canvas_sizes, str, canvas_size, ic, st); + if (canvas_size && + av_parse_video_size(&dec->width, &dec->height, canvas_size) < 0) { + av_log(NULL, AV_LOG_FATAL, "Invalid canvas size: %s.\n", canvas_size); + exit(1); + } break; + } case AVMEDIA_TYPE_ATTACHMENT: case AVMEDIA_TYPE_UNKNOWN: break; @@ -2593,6 +2601,8 @@ const OptionDef options[] = { , "force subtitle tag/fourcc", "fourcc/tag" }, { "fix_sub_duration", OPT_BOOL | OPT_EXPERT | OPT_SUBTITLE | OPT_SPEC, { .off = OFFSET(fix_sub_duration) }, "fix subtitles duration" }, + { "canvas_size", OPT_SUBTITLE | HAS_ARG | OPT_STRING | OPT_SPEC, { .off = OFFSET(canvas_sizes) }, + "set canvas size (WxH or abbreviation)", "size" }, /* grab options */ { "vc", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_video_channel }, |