Sometimes the dialogue drifts (especially during the river crossing scene). To shift the audio 1.5 seconds forward to match the new encode:

for episode in *.mkv; do ffmpeg -i "$episode" \ -vf "yadif=1,scale=1280:720" \ -c:v libx264 -crf 22 \ -c:a aac -b:a 128k \ -movflags +faststart \ "streaming_${episode%.mkv}.mp4" echo "Processed ${episode} — dinna fash yerself." done

ffmpeg -i outlander_s04e05_mountains.mkv -vf "zscale=transfer=linear,tonemap=hable,zscale=transfer=bt709,format=yuv420p" -c:v libx264 -crf 18 -preset slow fraser_ridge_sdr.mp4 Result: The blue ridge mountains actually look blue.