d2f17deb2c
* Update stream_functions.c: fix MP4 file type detector On bad inputs containing e.g. the following sequence of bytes within the first 1MiB "ff ff ff ff 6d 65 74 61" `detect_stream_type` was executing an infinite loop because "ff ff ff ff" was interpreted as a length of the candidate "meta" MP4 box, caused the size_t overflow inside `isValidMP4Box` which pointed `nextBoxLocation` to the previous byte and the execution flow processed the same "meta" again. * Update CHANGES.TXT * Treat a candidate MP4 box as invalid instead of bailing out * Fix stuck mp4 processing in `process_avc_sample` On corrupted inputs it could read data past the sample end and also get stuck in an infinite loop. * Fix the stats code to not count zero-sized NALs and avoid dereferencing memory past the NAL end * Add comment. * Format changes
CCExtractor
check AUTHORS.TXT for history and developers
License
GPL 2.0.
Description
Since the original port, the whole code has been rewritten (more than once, one might add) and support for most subtitle formats around the world has been added (teletext, DVB, CEA-708, ISDB...)
Basic Usage
(please run ccextractor with no parameters for the complete manual - this is for your convenience, really).
ccextractor reads a video stream looking for closed captions (subtitles). It can do two things:
- Save the data to a "raw", unprocessed file which you can later use as input for other tools, such as McPoodle's excellent suite.
- Generate a subtitles file (.srt,.smi, or .txt) which you can directly use with your favourite player.
Running ccextractor without parameters shows the help screen. Usage is trivial - you just need to pass the input file and (optionally) some details about the input and output files.
Languages
Usually English captions are transmitted in line 21 field 1 data, using channel 1, so the default values are correct so you don't need to do anything and you don't need to understand what it all means.
If you want the Spanish captions, you may need to play a bit with the parameters. From what I've been, Spanish captions are usually sent in field 2, and sometimes in channel 2.
So try adding these parameter combinations to your other parameters.
-2 -cc2 -2 -cc2
If there are Spanish subtitles, one of them should work.
McPoodle's page
http://www.theneitherworld.com/mcpoodle/SCC_TOOLS/DOCS/SCC_TOOLS.HTML
Essential CC related information and free (with source) tools.
Encoding
This version, in both its Linux and Windows builds generates by default Unicode files. You can use -latin1 and -utf8 if you prefer these encodings (usually it just depends on what your specific player likes).
Future work
- Please check www.ccextractor.org for news and future work.