Subtitles: How to extract EIA-608 / EIA-708 subtitles from an MP4 or MKV? - Video https://www.tweaking4all.com/forum/video/subtitles-how-to-extract-eia-608-eia-708-subtitles-from-an-mp4/ Tweaking4All.com Discussion Board en-US Tue, 21 Jul 2026 01:50:45 +0000 wpForo 60 RE: Subtitles: How to extract EIA-608 / EIA-708 subtitles from an MP4? https://www.tweaking4all.com/forum/video/subtitles-how-to-extract-eia-608-eia-708-subtitles-from-an-mp4/#post-5801 Sun, 30 Mar 2025 07:45:57 +0000 Note: Works with MKV files as well. 😊 

]]> Video Hans https://www.tweaking4all.com/forum/video/subtitles-how-to-extract-eia-608-eia-708-subtitles-from-an-mp4/#post-5801 Subtitles: How to extract EIA-608 / EIA-708 subtitles from an MP4 or MKV? https://www.tweaking4all.com/forum/video/subtitles-how-to-extract-eia-608-eia-708-subtitles-from-an-mp4/#post-5800 Fri, 28 Mar 2025 11:37:27 +0000 Sometimes one runs into that weird (HDTV) video file with an obscure subtitle format which ffmpeg and ffprobe do not even see but your media player (I use IINA on my Mac) and Media Info do show these subtitle tracks marked as EIA-608 and/or EIA-708.

An example screenshot of Media Info:

673

So how do we extract this subtitle to an SRT file?

Seem ffmpeg can actually do something with this file. Extract the subtitle like so:

ffmpeg -f lavfi  -i "movie='YourVideoFilename.mp4' " -map 0:s:0 eia608_subs.srt

** Mind the double and single quotes ...

This will result in a proper SRT file (with a potentially formatting tags).

Note: -map 0:s:0 will select the first EIA-608 subtitle.
If there are multiple you can select the next one with -map 0:s:1, and the next one with -map 0:s:2, etc.

]]> Video Hans https://www.tweaking4all.com/forum/video/subtitles-how-to-extract-eia-608-eia-708-subtitles-from-an-mp4/#post-5800