Step 1. Open VideoProc Converter AI and import the M3U8 file folder to it. Launch this program, click "Video Converter" and "+Video Folder" to add your M3U8 folder which consists of several .ts files. Step 2. Choose MP4 as the target format. Now, click "Video" at the bottom and select "MP4". I want to remux a mkv file into mp4. I used the following command. ffmpeg -i "input.mkv" -c:v copy -c:a copy -map 0:0 -map 0:1 -map 0:2 -map 0:3 -c:s mov_text "output.mp4" Problem: The subtitles in the output.mp4 file are way too small. Also, the subtitles of the mp4 file are unaffected when I try to make them bigger from vlc preferences. If your Chromecast already appears in the menu, click on it in the list. Open a video file in VLC and click the "Play" button. Use the Media > Open File menu or just drag and drop a video file from your file manager onto the VLC window. After you try to play the video, you'll see an "Insecure site" prompt. Click "View certificate" to view your When I use VLC to play the dvd, I can select the subtitles I want (English, Spanish, etc.) without an issue. But when I go to convert the dvd to an mkv or mp4, I choose that same subtitle option and convert/save, but the subtitles are not available in the final converted file. I've checked Preferences / subtitles to make sure that they're not UniConverter's auto subtitle generator is more user-friendly with a simple drag-and-drop interface, and it also supports a wider range of video and audio file formats. Free Download Free Download . Part 2. Can VLC Automatically Generate Subtitles. VLC is a widely used free and open-source multimedia player that is compatible with multiple This subtitled_video.mp4 will show subtitles in VLC 3.0.4, but I have to explicitly right-click and choose Subtitle/Sub Track/Track 1 - [English] in VLC. Opening subtitled_video.mp4 in Firefox 60 will show no subtitles, nor a button/context menu to enable them. At this point, let's note that Firefox does have some UI for subtitles: Alternative Ways of Converting MKV Files to MP4. VLC isn’t the only tool you can use to convert MKV files to MP4. Here are some other alternatives you can use to achieve it. Also Read: Best Video Players For iPad. 1. Movavi Video Converter The video and audio streams are encoded using codecs such as libx264 and vorbis etc. Since mkv and mp4 can both hold the same codecs (as far as I'm aware) you can losslessly convert an mp4 file into an mkv file in order to take advantage of the additional functionality mkv can provide, such as better support for subtitles etc. AVvs.