Subtitles can be external (as.srt,.ass files) and internal (inside container.mkv,.webm). We can use ffmpeg utility to inserting or extracting them. This article is about using ffmpeg to extract and add subtitles from/into container. Before we start, i wanna note that.mp4 and.avi containers don’t always can keep subtitles inside.
Dec 2, 2011 - Hi guys, I've searched for a while and tried many softs but nothing has worked yet. To begin here's a part of the mediainfo: Format: MPEG-TS.
This may require additional specifications and standards. More information about the formats can be found on in Wikipedia. Extract subtitles from containerFirst, we need to check streams for their indexes in our video.
Just run ffmpeg with -i “video file” as an argument: ffmpeg -i video.mkv.Stream # 0:0: Video: h264 (High), yuv420p(progressive), 960x544, SAR 4:3 DAR 40:17, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)Stream # 0:1(eng): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)Stream # 0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/sStream # 0:3(ger): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/sStream # 0:4(eng): Subtitle: subrip (default)Stream # 0:5(ger): Subtitle: subripNow, we see two subtitle streams called #0:4 and #0:5. They are in.srt (subrip) format. We can use their indexes (0:4, 0:5) to extract them. Let’s extract first subtitle track. It is called Stream #0:4: ffmpeg -i video.mkv -map 0:4 -vn -an subtitles.srt.Stream mapping:Stream #0:4 ( #0:0 (subrip (srt) - subrip (srt) ( #0:0 (subrip (srt) - ass (ssa)) ( #0:0 (copy) ( #0:0 (copy)Stream #0:1 - #0:1 (copy)Stream #0:2 - #0:2 (copy)Stream #1:0 ( #0:3 (copy) (.
Ffmpeg Remove Subtitles
Summary of the bug:When transoding/reencoding video ffmepg loses the CC data that was embedded within the actual video stream itself. This type of CC is referred to as EIA-608/EIA-708 and is muxed to the video stream following guidelines in SCTE 128 from my research. If you use '-c:v copy' the CC remains intact.
Ffmpeg Extract Text
I'm capturing live video from the gige port of a Motorola DSR-6100 IRD that is putting out UDP multicast TS.This PDF give more details regarding how this method of CC works:Here are the files produced from the below command. They are larger than the 10MB requested so I've hosted them on my site, here are the direct links.- Original(18.2MB)- Reencoded(8.9MB)There is another open source project that seems to have figured out how to pull this CC data from video. I'm not sure if this should constitute a new ticket, but the 'lavfi' method in the revision doesn't work exactly right on a -Captioned MOV file. FFMPEG didn't extract anything regardless of seeing the input track.