Collection of private batch scripts used for ffmpeg processing (video and audio)
A table describing common FFmpeg video conversion parameters and how their values affect quality and conversion speed:
| Parameter | Description | Quality (Higher/Lower) | Speed (Faster/Slower) |
|---|---|---|---|
-crf |
Constant Rate Factor (quality for x264/x265) | Lower value (e.g. 18) = Higher quality, larger file; Higher value (e.g. 28) = Lower quality, smaller file | Lower value = Slower (more data to process); Higher value = Faster |
-preset |
Encoding speed/efficiency tradeoff | veryslow = Best quality for size; ultrafast = Lower quality |
ultrafast = Fastest; veryslow = Slowest |
-profile:v |
H.264/H.265 profile (features used) | high = Best quality/features; baseline = Most compatible, less quality |
Minimal impaact |
-pix_fmt |
Pixel format (color sampling) | yuv420p = Standard for web, good quality; yuv444p = Higher quality, less compatible |
yuv420p = Faster; yuv444p = Slower |
-b:v |
Video bitrate (CBR) | Higher value = Higher quality | Lower value = Faster (less data); Higher = Slower |
-maxrate |
Maximum allowed bitrate (VBR) | Higher value = Potentially higher quality peaks | Lower value = Faster |
-bufsize |
Rate control buffer size | Larger buffer = Smoother quality, more consistent | Larger = Slightly slower |
-g |
GOP size (distance between I-frames) | Shorter GOP (lower value) = Higher quality for seeking, bigger files | Longer GOP = Faster encoding, smaller files |
-c:v |
Video codec (e.g. libx264, libx265) | libx265 = Better compresion, same quality at lower bitrate |
libx264 = Faster encoding; libx265 = Slower |
-threads |
Number of CPU threads | No direct impact | More threads = Faster encoding (if supported) |
-vf |
Video filters (scaling, color, etc.) | Higher quality filters (e.g. lanczos scaling) |
Simpler filters (e.g. bilinear) = Faster |
Further parameters
| Parameter | Description |
|---|---|
-map_metadata |
to have resulting video files without metadata info use -1 |