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• FFMPEG API : how to use lossless h264 encoding ?

  17 octobre 2012, par user1282931

  what settings are necessary to use h264 lossless encoding ? I'm not talking about ffmpeg commandline tool, but about the c api.

  I manage to encode video with lossy h264, but I don't know how to set the encoder to lossless.?

  I code in MSVC++ and use precompiled libraries. online i found some .ffpreset files (for example libx264-lossless_max.ffpreset) which don't seem to be part of the precompiled version i use (at least they are not in the presets folder). I'm not sure whether ffpreset files are somehow compiled into the library, or whether they can be loaded into the encoder somehow ? if so, how would I use such a preset file ?

• Set the width of text in FFMPEG

  7 juin 2020, par Super Gadgets

  I am currently stuck with ffmpeg issue, I have an online video editor where users can add text and edit it.

  



  So I make an overlay div over the tag to let the user see exactly what the video will look like after render.

  



  But here is the issue : How can I get the css and let ffmpeg apply it on the text, the css will be the div where the transcription is how width, height , margins , colors ...

  



  Here is an example of a box :

  



  <div style="width:100px;text-align:center;top:10px;left:10px> TEXT HERE <div>&amp;#xA;

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  P.s : I tried Aegisub, force_style but no options seems to offer setting the width of the box.

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  Is there any way to do this ? Thank you.

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