CCEXTRACTOR(1)

πŸ“¦ version 0.94, in ubuntu jammy, ubuntu noble

πŸ’– CCEXTRACTOR(1) πŸ’–

okay bestie, quick heads up: this is section 1, the User Commands manual, and it's all about CCExtractor β€” the closed captions extractor. Buckle up, there's a LOT. πŸŽ€

🌸 NAME 🌸

CCExtractor β€” closed captions extractor. that's it, that's the whole vibe. πŸ‘‘


🌈 SYNOPSIS 🌈

ccextractor [options] inputfile1 [inputfile2...] [-o outputfilename]
[-o1 outputfilename1] [-o2 outputfilename2]

✨ DESCRIPTION ✨

It pulls closed captions and teletext subtitles out of video streams, periodt. The formats known to actually work: DVB, .TS, ReplayTV 4000 and 5000, dvr-ms, bttv, Tivo, Dish Network, .mp4, and HDHomeRun. πŸ¦‹

It can do two things:

  • Save the data to a "raw", unprocessed file that you can later feed into other tools. πŸ’Ύ
  • Generate a subtitles file (.srt, .smi, or .txt) that you can use directly with your favourite player. 🎬

πŸŽ€ OPTIONS πŸŽ€

  • inputfile β€” the file(s) to process. πŸ“
  • -o outputfilename β€” use -o to name your output file if the default names aren't it (defaults are the same as infile plus _1 or _2 when needed, plus the file extension, e.g. .srt).
  • -cf filename β€” write 'clean' data to a file. "Clean" means the ES without TS or PES headers. no clutter, just the good stuff. ✨
  • -stdout β€” write output to stdout (console) instead of a file. If stdout is being used, then -o, -o1 and -o2 can't be used. Also, -stdout redirects all messages to stderr (error). πŸ’…
  • -pesheader β€” dump the PES Header to stdout (console). This is for debugging purposes so you can peek at the contents of each PES packet header. πŸ”
  • -debugdvbsub β€” write the DVB subtitle debug traces to the console.
  • -ignoreptsjumps β€” ignore PTS jumps (this is the default).
  • -fixptsjumps β€” fix pts jumps. use this one if you're experiencing timeline resets/jumps in the output. 😭
  • -stdin β€” reads input from stdin (console) instead of a file.

You can pass as many input files as you need, and they'll be processed in order. If a file name is suffixed by +, ccextractor will try to follow a numerical sequence. For example, DVD001.VOB+ means DVD001.VOB, DVD002.VOB and so on until there are no more files. Output will be one single file (either raw or srt). Use this if you made your recording in several cuts (to skip commercials for example) but you want one subtitle file with contiguous timing. πŸ”₯

βœ‚οΈ Output file segmentation βœ‚οΈ

  • -outinterval x β€” output in interval of x seconds.
  • --segmentonkeyonly, -key β€” when segmenting files, do it only after an I frame, trying to behave like FFmpeg. πŸ’«

🌐 Network support 🌐

  • -udp port β€” read the input via UDP (listening in the specified port) instead of reading a file.
  • -udp [host:]port β€” read the input via UDP (listening in the specified port) instead of reading a file. Host can be a hostname or IPv4 address. If host isn't specified, then it listens on the local host.
  • -udp [src@host:]port β€” read the input via UDP (listening in the specified port) instead of reading a file. Host and src can be a hostname or IPv4 address. If host isn't specified, then it listens on the local host.
  • -sendto host[:port] β€” sends data in BIN format to the server according to the CCExtractor's protocol over TCP. For IPv6 use [address]:port. πŸ“‘
  • -tcp port β€” reads the input data in BIN format according to CCExtractor's protocol, listening on the specified port on the local host.
  • -tcppassword password β€” sets the server password for new connections to the tcp server. πŸ”
  • -tcpdesc description β€” sends the server a short description about captions, e.g. channel name or file name.

🧠 Options that affect what will be processed 🧠

  • -1, -2, -12 β€” output Field 1 data, Field 2 data, or both (DEFAULT is -1).
  • --append β€” prevents overwriting of existing files. The output will be appended instead. 🫢
  • -cc2 β€” when in srt/sami mode, process captions in channel 2 instead of channel 1.
  • -svc, --service N1[cs1],N2[cs2]... β€” enable CEA-708 (DTVCC) captions processing for the listed services. The parameter is a comma delimited list of service numbers, such as "1,2" to process the primary and secondary language services. Pass "all" to process all services found.

If captions in a service are stored in 16-bit encoding, you can specify what charset or encoding was used. Pass its name after the service number (e.g. "1[EUC-KR],3" or "all[EUC-KR]") and it will encode the specified charset to UTF-8 using iconv. See iconv documentation to check if the required encoding/charset is supported.

In general, if you want English subtitles you don't need to use these options, as they are broadcast in field 1, channel 1. If you want the second language (usually Spanish) you may need to try -2, or -cc2, or both. πŸ‡ͺπŸ‡Έ

πŸ“₯ Input formats πŸ“₯

With the exception of McPoodle's raw format (which is just the closed caption data with no other info), CCExtractor can usually detect the input format correctly. To force a specific format:

-in=format

where format is one of these:

  • ts -> For Transport Streams.
  • ps -> For Program Streams.
  • es -> For Elementary Streams.
  • asf -> ASF container (such as DVR-MS).
  • wtv -> Windows Television (WTV)
  • bin -> CCExtractor's own binary format.
  • raw -> For McPoodle's raw files.
  • mp4 -> MP4/MOV/M4V and similar.
  • mkv -> Matroska container and WebM.

-ts, -ps, -es, -mp4, -wtv and -asf (or --dvr-ms) can be used as shorts. πŸ’…

πŸ“€ Output formats πŸ“€

-out=format

where format is one of these:

  • srt -> SubRip (default, so not actually needed). ⭐
  • ass/ssa -> SubStation Alpha.
  • webvtt -> WebVTT format
  • webvtt-full -> WebVTT format with styling
  • sami -> MS Synchronized Accesible Media Interface.
  • bin -> CC data in CCExtractor's own binary format.
  • raw -> CC data in McPoodle's Broadcast format.
  • dvdraw -> CC data in McPoodle's DVD format.
  • txt -> Transcript (no time codes, no roll-up captions, just the plain transcription.
  • ttxt -> Timed Transcript (transcription with time info)
  • smptett -> SMPTE Timed Text (W3C TTML) format.
  • spupng -> Set of .xml and .png files for use with dvdauthor's spumux. See "Notes on spupng output format"
  • null -> Don't produce any file output
  • report -> Prints to stdout information about captions in specified input. Don't produce any file output

βš™οΈ Options that affect how input files will be processed βš™οΈ

  • -gt, --goptime β€” use GOP for timing instead of PTS. This only applies to Program or Transport Streams with MPEG2 data and overrides the default PTS timing. GOP timing is always used for Elementary Streams.
  • -nogt, --nogoptime β€” never use GOP timing (use PTS), even if ccextractor detects GOP timing is the reasonable choice.
  • -fp, --fixpadding β€” fix padding. some cards (or providers, or whatever) seem to send 0000 as CC padding instead of 8080. If you get bad timing, this might solve it. πŸ™ˆ
  • -90090 β€” use 90090 (instead of 90000) as MPEG clock frequency. (reported to be needed at least by Panasonic DMR-ES15 DVD Recorder)
  • -ve, --videoedited β€” by default, ccextractor will process input files in sequence as if they were all one large file (i.e. split by a generic, non video-aware tool). If you are processing video that was split with an editing tool, use -ve so ccextractor doesn't try to rebuild the original timing.
  • -s, --stream [secs] β€” consider the file as a continuous stream that is growing as ccextractor processes it, so don't try to figure out its size and don't terminate processing when reaching the current end (i.e. wait for more data to arrive). If the optional parameter secs is present, it means the number of seconds without any new data after which ccextractor should exit. Use this parameter if you want to process a live stream but not kill ccextractor externally.
Note: If -s is used then only one input file is allowed.
  • -poc, --usepicorder β€” use the pic_order_cnt_lsb in AVC/H.264 data streams to order the CC information. The default way is to use the PTS information. Use this switch only when needed.
  • -myth β€” force MythTV code branch.
  • -nomyth β€” disable MythTV code branch. The MythTV branch is needed for analog captures where the closed caption data is stored in the VBI, such as those with bttv cards (Hauppage 250 for example). This is detected automatically so you don't need to worry about this unless autodetection doesn't work for you.
  • -wtvconvertfix β€” this switch works around a bug in Windows 7's built in software to convert *.wtv to *.dvr-ms. For analog NTSC recordings the CC information is marked as digital captions. Use this switch only when needed.
  • -wtvmpeg2 β€” read the captions from the MPEG2 video stream rather than the captions stream in WTV files.
  • -pn, --program-number β€” in TS mode, specifically select a program to process. Not needed if the TS only has one. If this parameter is not specified and CCExtractor detects more than one program in the input, it will list the programs found and terminate without doing anything, unless -autoprogram (see below) is used. πŸ‘‘
  • -autoprogram β€” if there's more than one program in the stream, just use the first one we find that contains a suitable stream.
  • -datapid β€” don't try to find out the stream for caption/teletext data, just use this one instead.
  • -datastreamtype β€” instead of selecting the stream by its PID, select it by its type (pick the stream that has this type in the PMT).
  • -streamtype β€” assume the data is of this type, don't autodetect. This parameter may be needed if -datapid or -datastreamtype is used and CCExtractor cannot determine how to process the stream. The value will usually be 2 (MPEG video) or 6 (MPEG private data).
  • -haup, --hauppauge β€” if the video was recorded using a Hauppauge card, it might need special processing. This parameter will force the special treatment. πŸŽ₯
  • -mp4vidtrack β€” in MP4 files the closed caption data can be embedded in the video track or in a dedicated CC track. If a dedicated track is detected it will be processed instead of the video track. If you need to force the video track to be processed instead, use this option.
  • -noautotimeref

Okay so some streams roll up with broadcast date info already baked in. When that data is available, CCExtractor sets its time reference to whatever it received. Use this parameter if you'd rather keep your own reference instead. 🫢 Heads up though: currently this only affects Teletext in timed transcript with -datets.

  • --noscte20 β€” SCTE-20 data? If it's there, ignore it. Simple as that. πŸ’…
  • --webvtt-create-css β€” Make a whole separate file for the CSS instead of inlining it.
  • -deblev β€” Turns on debug so the calculated distance for every pair of strings gets printed. The output shows both strings, the calculated distance, the maximum allowed distance, and whether the strings are ultimately considered equivalent or not β€” meaning the calculated distance is less than or equal to the max allowed. Full transparency, bestie. πŸ”
  • -anvid, --analyzevideo β€” Analyze the video stream even when it's not being used for subtitles. This lets you get video information out of it. πŸ‘€

πŸŽ€ Levenshtein distance πŸŽ€

When it's processing teletext files, CCExtractor tries to fix typos by comparing consecutive lines. If line N+1 is almost identical to line N except for tiny changes (plus next characters), it assumes line N had a typo that got corrected in N+1. This is currently only implemented for teletext, because that's where the sample files that could actually benefit from it were available. You can tune β€” or fully disable β€” the algorithm with these parameters. ✨

  • -nolevdist β€” Don't even try to correct typos with Levenshtein distance.
  • -levdistmincnt value β€” The minimum distance we always allow, no matter how long the strings are. Default 2. So if the calculated distance is 0, 1 or 2, we consider the strings equivalent. πŸ’–
  • -levdistmaxpct value β€” The maximum distance we allow, expressed as a percentage of the shortest string's length. Default 10%. For example, picture comparing one string of 30 characters against one of 60 characters. We want to know whether the first 30 characters of the longer string are more or less the same as the shortest string β€” i.e. whether the longest string is just the shortest one plus new characters and maybe some corrections. Since the shortest string is 30 characters and the default percentage is 10%, we'd allow a distance of up to 3 between the first 30 characters.

✨ Options that affect what kind of output will be produced ✨

  • -chapters (Experimental) β€” Produces a chapter file from MP4 files. Note that this must only be used with MP4 files β€” for other files it will simply generate a subtitles file. No cap.
  • -bom β€” Append a BOM (Byte Order Mark) to output files. Note that most text processing tools in linux will not be into BOM. πŸ™ˆ This is the default in Windows builds.
  • -nobom β€” Do not append a BOM (Byte Order Mark) to output files. Note that this may break files when using Windows. This is the default in non-Windows builds.
  • -unicode β€” Encode subtitles in Unicode instead of Latin-1.
  • -utf8 β€” Encode subtitles in UTF-8 (no longer needed, because UTF-8 is now the default).
  • -latin1 β€” Encode subtitles in Latin-1.
  • -nofc, --nofontcolor β€” For .srt/.sami/.vtt, don't add font color tags.
  • --nohtmlescape β€” For .srt/.sami/.vtt, don't escape html unsafe characters.
  • -nots, --notypesetting β€” For .srt/.sami/.vtt, don't add typesetting tags.
  • -trim β€” Trim lines.
  • -dc, --defaultcolor β€” Pick a different default color (instead of white). This causes all output in .srt/.smi/.vtt files to have a font tag, which makes the files larger. Add the color you want in RGB, like -dc #FF0000 for red. πŸ“
  • -sc, --sentencecap β€” Sentence capitalization. Use this if you hate ALL CAPS in subtitles.
  • -sbs, --splitbysentence β€” Split output text so each frame contains a complete sentence. Timings get adjusted based on number of characters.
  • --capfile, -caf file β€” Add the contents of file to the list of words that must be capitalized. For example, if file is a plain text file containing:
Tony
Alan

Whenever those words are found they'll be written exactly as they appear in the file. Use one line per word. Lines starting with # are considered comments and discarded. πŸ’…

  • -unixts REF β€” For timed transcripts that have an absolute date instead of a timestamp relative to the file start, use this time reference (UNIX timestamp). 0 => use current system time. ccextractor will automatically switch to transport stream UTC timestamps when available.
  • -datets β€” In transcripts, write time as YYYYMMDDHHMMss,ms.
  • -sects β€” In transcripts, write time as ss,ms.
  • -UCLA β€” Transcripts are generated with a specific format that's convenient for a specific project. Feel free to play with it, but be aware that this format is really live β€” don't rely on its output format not changing between versions. ⚠️
  • -lf β€” Use LF (UNIX) instead of CRLF (DOS, Windows) as line terminator.
  • -autodash β€” Based on position on screen, attempt to determine the different speakers and a dash (-) when each of them talks (.srt/.vtt only, -trim required).
  • -xmltv mode β€” Produce an XMLTV file containing the EPG data from the source TS file. Mode: 1 = full output, 2 = live output, 3 = both.
  • -sem β€” Create a .sem file for each output file that is open and delete it on file close.
  • -dvbcolor β€” For DVB subtitles, also output the color of the subtitles, if the output format is SRT or WebVTT.
  • -nodvbcolor β€” In DVB subtitles, disable color in output.
  • -dvblang β€” For DVB subtitles, select which language's caption stream will be processed. e.g. 'eng' for English. If there are multiple languages, only this specified language stream will be processed (default).
  • -ocrlang β€” Manually select the name of the Tesseract .traineddata file. Helpful if you want to OCR a caption stream of one language using the data of another language. e.g. '-dvblang chs -ocrlang chi_tra' will decode the Chinese (Simplified) caption stream but perform OCR using the Chinese (Traditional) trained data. This option is also helpful when the traineddata file has non-standard names that don't follow ISO specs. 🧠
  • -oem β€” Select the OEM mode for Tesseract. Could be 0, 1 or 2. 0: OEM_TESSERACT_ONLY β€” default value, the fastest mode. 1: OEM_LSTM_ONLY β€” use LSTM algorithm for recognition. 2: OEM_TESSERACT_LSTM_COMBINED β€” both algorithms.
  • -mkvlang β€” For MKV subtitles, select which language's caption stream will be processed. e.g. 'eng' for English. Language codes can be either the 3 letters bibliographic ISO-639-2 form (like "fre" for french) or a language code followed by a dash and a country code for specialities in languages (like "fre-ca" for Canadian French).
  • -nospupngocr β€” When processing DVB, don't use the OCR to write the text as comments in the XML file.
  • -font β€” Specify the full path of the font that's to be used when generating SPUPNG files.

🌈 Options that affect how ccextractor reads and writes (buffering) 🌈

  • -bi, --bufferinput β€” Forces input buffering.
  • -nobi, -nobufferinput β€” Disables input buffering.
  • -bs, --buffersize val β€” Specify a size for reading, in bytes (suffix with K or M for kilobytes and megabytes). Default is 16M.
  • -koc β€” keep-output-close. If used, CCExtractor will close the output file after writing each subtitle frame and attempt to create it again when needed.
  • -ff, --forceflush β€” Flush the file buffer whenever content is written.

πŸ‘‘ Options that affect the built-in 608 closed caption decoder πŸ‘‘

  • -dru β€” Direct Roll-Up. When in roll-up mode, write character by character instead of line by line. Note that this produces (much) larger files. πŸ’€
  • -noru, --norollup β€” If you hate the repeated lines caused by the roll-up emulation, you can have ccextractor write only one line at a time, getting rid of those repeated lines.
  • -ru1 / -ru2 / -ru3 β€” Roll-up captions can consist of 2, 3 or 4 visible lines at any time (the number of lines is part of the transmission). If having 3 or 4 lines annoys you, you can use -ru to force the decoder to always use 1, 2 or 3 lines. Note that 1 line is not a real rollup mode, so CCExtractor does what it can. In -ru1 the start timestamp is actually the timestamp of the first character received, which is possibly more accurate. ✨

⏰ Options that affect timing ⏰

  • -delay ms β€” For srt/sami/webvtt, add this number of milliseconds to all times. For example, -delay 400 makes subtitles appear 400ms late. You can also use negative numbers to make subs appear early. ⏱️

Notes on times: -startat and -endat times are used first, then -delay. So if you use -srt -startat 3:00 -endat 5:00 -delay 120000, ccextractor will generate a .srt file, with only data from 3:00 to 5:00 in the input file(s), and then add that (huge) delay, which would make the final file start at 5:00 and end at 7:00. 😭


🎯 Options that affect what segment of the input file(s) to process 🎯

  • -startat time β€” Only write caption information that starts after the given time. Time can be seconds, MM:SS or HH:MM:SS. For example, -startat 3:00 means 'start writing from minute 3'.
  • -endat time β€” Stop processing after the given time (same format as -startat). The -startat and -endat options are honored in all output formats. In all formats with timing information, the times are unchanged.
  • -scr, --screenfuls num β€” Write num screenfuls and terminate processing.

🧚 Options that affect which codec is to be used have to be searched in input 🧚

If codec type is not selected, then the first elementary stream suitable for subtitle is selected. Please consider -teletext / -noteletext override this option.

  • -codec dvbsub β€” Select the dvb subtitle from all elementary streams. If a stream of dvb subtitle type is not found, then nothing is selected and no subtitle is generated.
  • -nocodec dvbsub β€” Ignore dvb subtitle and follow default behaviour.
  • -codec teletext
  • -codec teletext β€” picks the teletext subtitle out of the elementary stream
  • -nocodec teletext β€” just ignores the teletext subtitle entirely
NOTE, and bestie this one actually matters: options written like -foo=bar, -foo = bar or --foo=bar are invalid. The only valid form is -foo bar, periodt. Also nocodec and codec must not be the same β€” if they are, the nocodec parameter gets ignored. Pass this flag once; more than one isn't supported yet and the last parameter is the one that gets taken into consideration. 🫢

🎬 Adding start and end credits 🎬

CCExtractor can try to add a custom message (credits, for example) at the start and at the end of the file, by hunting for a window where there are no captions. If there's no such window, then no text gets added at all, sorry. The start window has to fall between the times you give it, and it has to have enough time to display the message for at least the duration you specified. ✨

  • --startcreditstext txt β€” write this text as the start credits. If it's several lines, separate them with the characters \n, like Line1\nLine 2.
  • --startcreditsnotbefore time β€” don't show the start credits before this time (in S, or MM:SS). Default: 0
  • --startcreditsnotafter time β€” don't show the start credits after this time (in S, or MM:SS). Default: 5:00
  • --startcreditsforatleast time β€” start credits need to be displayed for at least this long (in S, or MM:SS). Default: 2
  • --startcreditsforatmost time β€” start credits should be displayed for at most this long (in S, or MM:SS). Default: 5
  • --endcreditstext txt β€” write this text as the end credits. If it's several lines, separate them with the characters \n, like Line1\nLine 2.
  • --endcreditsforatleast time β€” end credits need to be displayed for at least this long (in S, or MM:SS). Default: 2
  • --endcreditsforatmost time β€” end credits should be displayed for at most this long (in S, or MM:SS). Default: 5

πŸ› Options that affect debug data πŸ›

  • -debug β€” show lots of debugging output. Like, a lot.
  • -608 β€” print debug traces from the EIA-608 decoder. If you're filing a bug report, please send the output from this option, k?
  • -708 β€” print debug information from the (currently in development πŸ‘€) EIA-708 (DTV) decoder.
  • -goppts β€” enable lots of time stamp output.
  • -xdsdebug β€” enable XDS debug data (lots of it).
  • -vides β€” print debug info about the analysed elementary video stream.
  • -cbraw β€” print debug trace with the raw 608/708 data, with time stamps.
  • -nosync β€” disable the syncing code. Only useful for debugging purposes.
  • -fullbin β€” disable the removal of trailing padding blocks when exporting to bin format. Only useful for debugging purposes.
  • -parsedebug β€” print debug info about the parsed container file. (Only for TS/ASF files at the moment.)
  • -parsePAT β€” print a Program Association Table dump.
  • -parsePMT β€” print a Program Map Table dump.
  • -dumpdef β€” hex-dump defective TS packets.
  • -investigate_packets β€” if no CC packets are detected based on the PMT, try to find data in all packets by scanning.
  • -tpage page β€” use this page for subtitles (if this parameter isn't used, it tries to autodetect). In Spain the page is always 888, though it may vary in other countries.
  • -tverbose β€” enable verbose mode in the teletext decoder.
  • -teletext β€” force teletext mode even if teletext isn't detected. If you use this, you should also pass -datapid to specify the stream ID you want to process.
  • -noteletext β€” disable teletext processing. This might be needed for video streams that have both teletext packets and CEA-608/708 packets (if teletext is processed then CEA-608/708 processing is disabled).

πŸ“ Transcript customizing options πŸ“

  • -customtxt format β€” use the passed format to customize the (Timed) Transcript output. The format must look like this: 1100100 (7 digits). These tell it whether the next things should be displayed or not in the (timed) transcript. In order, they represent:
    • Display start time
    • Display end time
    • Display caption mode
    • Display caption channel
    • Use a relative timestamp (relative to the sample)
    • Display XDS info
    • Use colors

Examples, bestie, take notes:

0000101 is the default setting for transcripts
1110101 is the default for timed transcripts
1111001 is the default setting for -ucla

Make sure you use this parameter after the others that might affect these settings (-out, -ucla, -xds, -txt, -ttxt ...). Order matters, fr fr.

πŸ’¬ Communication with other programs and console output πŸ’¬

  • --gui_mode_reports β€” report progress and interesting events to stderr in an easy to parse format. This is intended to be used by other programs. See the docs directory for details.
  • --no_progress_bar β€” suppress the output of the progress bar.
  • -quiet β€” don't write any message. Shhh. 🀫

Notes on the CEA-708 decoder: while it's starting to be useful, it's a work in progress. A number of things don't work yet in the decoder itself, and many of the auxiliary tools (case conversion, to name one) won't do anything yet. Feel free to submit samples that cause problems, plus feature requests. πŸ™ˆ

Notes on spupng output format: one .xml file is created per output field. A set of .png files is created in a directory with the same base name as the corresponding .xml file(s), but with a .d extension. Each .png file will contain an image representing one caption and is named subNNNN.png, starting with sub0000.png.

For example, this command:

ccextractor -out=spupng input.mpg

will create the files:

input.xml
input.d/sub0000.png
input.d/sub0001.png
...

And this command:

ccextractor -out=spupng -o /tmp/output -12 input.mpg

will create the files:

/tmp/output_1.xml
/tmp/output_1.d/sub0000.png
/tmp/output_1.d/sub0001.png
...
/tmp/output_2.xml
/tmp/output_2.d/sub0000.png
/tmp/output_2.d/sub0001.png
...

πŸ”₯ Burned-in subtitle extraction πŸ”₯

  • -hardsubx β€” enable the burned-in subtitle extraction subsystem.
NOTE: the following options will work only if -hardsubx is specified before them. Order is not a vibe, it's a requirement. πŸ’…
  • -ocr_mode β€” set the OCR mode to either frame-wise, word-wise or letter wise. e.g. -ocr_mode frame (default), -ocr_mode word, -ocr_mode letter
  • -subcolor β€” specify the color of the subtitles. Possible values are in the set {white,yellow,green,cyan,blue,magenta,red}. Alternatively, a custom hue value between 1 and 360 may also be specified. e.g. -subcolor white or -subcolor 270 (for violet). Refer to an HSV color chart for values.
  • -min_sub_duration β€” specify the minimum duration that a subtitle line must exist on the screen. The value is specified in seconds. A lower value gives better results, but takes more processing time. The recommended value is 0.5 (default). e.g. -min_sub_duration 1.0 (for a duration of 1 second)
  • -detect_italics β€” specify whether italics are to be detected from the OCR text. Italic detection automatically enforces the OCR mode to be word-wise.
  • -conf_thresh β€” specify the classifier confidence threshold between 1 and 100. Try and use a threshold which works for you if you get a lot of garbage text. e.g. -conf_thresh 50
  • -whiteness_thresh β€” for white subtitles only, specify the luminance threshold between 1 and 100. This threshold is content dependent, and adjusting values may give you better results. Recommended values are in the range 80 to 100. The default value is 95

An example command for burned-in subtitle extraction goes like this:

ccextractor video.mp4 -hardsubx -subcolor white -detect_italics
-whiteness_thresh 90 -conf_thresh 60

  • --version β€” display the current CCExtractor version and detailed information. Slay.

πŸ‘‘ SEE ALSO πŸ‘‘

This tool's homepage:

http://www.ccextractor.org

Originally based on McPoodle's tools. Check his page for lots of information on closed captions technical details.

http://www.theneitherworld.com/mcpoodle/SCC_TOOLS/DOCS/SCC_TOOLS.HTML

okay that's the whole page, bestie!! πŸŽ€ this was CCExtractor 0.86, dated April 2018, credited to Carlos Fernan… (yeah the name literally gets cut off in the source, iconic πŸ’€), and it's the CCEXTRACTOR(1) manual. go forth and extract those captions, you absolute legend. πŸ’–βœ¨

πŸ“¦ where this page comes from