Reduce quality percentage wise?

Question

I have several movie files in a `mkv` container.`ffmpeg -i filename` gives me the following output: Stream #0.0(eng): Video: h264 (High), yuv420p, 1280x720, PAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Stream #0.1(eng): Audio: dca (DTS), 48000 Hz, 5.1, s16, 1536 kb/s (default) Stream #0.2(eng): Subtitle: [0][0][0][0] / 0x0000 (default) (forced)Unfortunately the file size is pretty big. I was wondering, if there is a way to reduce the file size percentage-wise? Something like: "Reduce file size by 10%"?I would prefer command line tools, such as `ffmpeg/avconv` or similar?

Answer 1

Yes, reduce the video data rate (bitrate) by 10%. If you can’t do it in FFMPEG, try in Handbrake.