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  1. #!/bin/sh
  2. # FIXME: Handle audio
  3. set -e
  4. INPUT=../src/omni/show0/earth.mp4
  5. LOGO=../../content/icon_small.png
  6. OUTPUT=../tmp/omni/show0/earth.webm
  7. HEIGHT=360
  8. VBITRATE=256000
  9. mkdir -p $(dirname "$OUTPUT")
  10. # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
  11. # + scale+watermark trick based on http://stackoverflow.com/a/10937357
  12. # + Add 1s latency (deadline)
  13. ffmpeg -hide_banner -threads auto -y -re \
  14. -i "$INPUT" \
  15. -i "$LOGO" \
  16. -filter_complex \
  17. "[0:v]scale=-1:$HEIGHT[bg];
  18. [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20" \
  19. -an \
  20. -pix_fmt yuv420p \
  21. -codec:v vp8 -quality realtime -deadline 1000000 -cpu-used 4 \
  22. -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
  23. -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
  24. -max-intra-rate 0 \
  25. -qmin 4 -qmax 56 \
  26. -f webm "$OUTPUT"