Do you have a good guide for balancing quality and size? I’ve searched but never found something that really nails it for me. I have until now just been keeping everything as it streamed off the dvd or bluray in mpeg4 or h264 in an mkv and yeah, time to re-encode in to something more reasonably sized.
Yes, I wrote a python script that uses FFMPEG and detects the bitrate of the file and determines approximately what CQ to use. If the original file has a low bitrate, by reencoding it with a high CQ you can actually increase the file size (lol).
Normal CQ = 28
Aggressive CQ = 34
# Thresholds to detect ultra-low-bitrate inputs (use more aggressive encoding)
# (width, height) → min sensible bitrate (bps). If stream <= threshold, use aggressive profile.
LOW_BITRATE_THRESHOLDS = [
((3840, 2160), 13_000_000), # 4K ≤13 Mbps → use aggressive encoding
((2560, 1440), 8_000_000), # 1440p
((1920, 1080), 5_000_000), # 1080p
((1280, 720), 2_500_000), # 720p
((854, 480), 1_200_000), # 480p
]
Do you have a good guide for balancing quality and size? I’ve searched but never found something that really nails it for me. I have until now just been keeping everything as it streamed off the dvd or bluray in mpeg4 or h264 in an mkv and yeah, time to re-encode in to something more reasonably sized.