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4

As you are hardcoding subtitles, the video (with the subtitles added) will be re-encoded. You can use the CRF rate control method to modulate the quality of the output. So, start with ffmpeg -i grdedFinal.mov -vf subtitles=portSbs.srt -crf 18 -c:a copy gradedFinalwithSubs.mov If the quality's not acceptable, lower that value till it is - in exchange ...


2

Here is the structure of a .sup subtitle file and a link to the splitter I created. Information is either from linked reference or my own research. The .sup subtitle splitter I created. http://forum.doom9.org/showthread.php?p=1737122 SupRip github page with sup related code. You can read more specifics about each section here that I don't discuss. ...


2

Everywhere I have worked uses proprietary software, but many professionals use Swift: http://www.grassvalley.com/products/swift_create


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Most episodic (network and cable) TV is captioned by service bureaus who use proprietary software. Some of the big players are VITAC, NCI, and WGBH, and there are several more. They all provide various levels of service, and some rely more heavily on automation / voice recognition etc than others. This is all offline captioning and the goal is accuracy in ...


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If you convert the .srt files to .ass, then you can have a lot more control over how the subtitles appear. To convert use ffmpeg: ffmpeg -i input.srt output.ass This will give you an .ass subtitle file. You'll see in the header of that file that there will be details about font, size, placement colour and so on. Here's an example from Wikipedia: ...


1

There are two aspects to your query - 1)setting one of the subtitle streams as the default and 2)automatically displaying it during playback.I'm not aware of a method to force a player to display subtitles if that facility has been turned off in its settings. For the first facility, try mkvpropedit from MKVToolNix to set the default flag for a subtitle ...


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You can try adding the original_size filter option, such as: -vf "ass=test_subs.ass:original_size=768x576" Specify the size of the original video, the video for which the ASS file was composed. For the syntax of this option, check the Video size section in the ffmpeg-utils manual. Due to a misdesign in ASS aspect ratio arithmetic, this is ...


1

I found some ASS files, like this sample, which contain a Video Aspect Ratio tag but it seems to not make a difference in ffmpeg hardcoding. The workaround I can think of right now is to create a complex filter where you create a transparent RGBA canvas of 1024x576; burn the subtitles onto them, scale the result to 768x576 or 720x576, depending on your ...



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