Encoding recommendations
In addition to settings found on this page, you may want to include the following general video settings.
crf
crf:Integer
API Versions: V2
Parent: outputs
Valid Values: 1-51
Compatible Job Types: VOD
Example: 26
Description:
CRF is a bitrate-control setting, and sets a constant ratefactor. This is closely related to constant quantizer encoding, though CRF mode generally achieves better compression than constant Q encoding by reducing the quantizer quality on "less important" frames. Read more about crf.
The Zencoder Quality setting determines an appropriate CRF for a given video. So if you set both Quality and CRF, the CRF setting will override Quality.
Valid values are 0-51, with lower values being better quality. Generally speaking, you shouldn't have to go below 16; 16 is nearly lossless for most files. Around 24 usually looks pretty good. Around 35 looks pretty compressed.
{
"input": "s3://zencodertesting/test.mov",
"outputs": [
{
"crf": "26"
}
]
}