Tootfinder

Quick tip: if `ffmpeg` shows the incorrect frame count when processing videos, just toss it through a quick `mkvmerge`.
```
for i in video*; do mkvmerge "$i" -o"temp_$i"; done
```
#mkvmerge #ffmpeg

Any #ffmpeg experts here? I want to do one simple thing: make certain colors transparent (then alphaextract to feed into tesseract #OCR). That's it. The colorkey filter is perfect, but it seems to be an absolute impossibility if you want more than one color transparent.