Burn subs and "scale" a video in ffmpeg?

[Unknown01]

Can ffmpeg do these 2 things at the same time (among others)?

Convert a "softsubbed" (subs can be disabled) to "hardsub" (subs are burned into the video and CAN NOT be disabled) and scale a video?



With scaling i mean that i put for example, 1000 width and let ffmpeg choose the correct height to match the width i input.

I read there is a "scale" function but when i use it in conjunction with other features (cutting video, converting to other format, etc) i get an error so i have to manually input both width and height.

[JVRaines]

You should be able to do this with a filterchain comprising the subtitle and scale filters. Specifying -1 for either height or width will result in the scale filter preserving input aspect ratio.

What command(s) are you using and what is the error message?

[Budman1]

Some versions of FFMpeg will error on the -1 if the resulting rounded dimension is unacceptable such as an odd number for an AVC codec. In the below example I used 722:-1 as the size since the original video was 854x480 (1.779). A width of 720 would have resulted in a rounded 405 as the height and it causes an error.

The string for adding subtitles is also shown for adding subtitles before resizing or resizing and then adding the subtitles (Larger).