ffmpeg:encoding:gpu_encoding
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| ffmpeg:encoding:gpu_encoding [2024/06/11 08:04] – peter | ffmpeg:encoding:gpu_encoding [2025/02/17 15:23] (current) – peter | ||
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| ====== ffmpeg - Encoding - GPU Encoding ====== | ====== ffmpeg - Encoding - GPU Encoding ====== | ||
| + | |||
| + | [[ffmpeg: | ||
| + | |||
| + | ---- | ||
| + | |||
| + | <code bash> | ||
| + | ffmpeg -i " | ||
| + | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| ===== Convert videos to H.265 / HEVC using ffmpeg and GPU hardware encoding ===== | ===== Convert videos to H.265 / HEVC using ffmpeg and GPU hardware encoding ===== | ||
| Line 7: | Line 18: | ||
| ffmpeg -i " | ffmpeg -i " | ||
| + | |||
| + | |||
| + | # This is hardware decoding and software encoding. | ||
| + | ffmpeg -hwaccel vaapi -hwaccel_device / | ||
| </ | </ | ||
| Line 37: | Line 52: | ||
| * **-i " | * **-i " | ||
| * **-vaapi_device / | * **-vaapi_device / | ||
| - | * **-vf ' | + | * **-vf ' |
| * The encoders only accept input as VAAPI surfaces. If the input is in normal memory, it will need to be uploaded before giving the frames to the encoder - in the ffmpeg utility, the hwupload filter can be used for this. | * The encoders only accept input as VAAPI surfaces. If the input is in normal memory, it will need to be uploaded before giving the frames to the encoder - in the ffmpeg utility, the hwupload filter can be used for this. | ||
| * It will upload to a surface with the same layout as the software frame, so it may be necessary to add a format filter immediately before to get the input into the right format (hardware generally wants the nv12 layout). | * It will upload to a surface with the same layout as the software frame, so it may be necessary to add a format filter immediately before to get the input into the right format (hardware generally wants the nv12 layout). | ||
| * The **hwupload** filter also requires a device to upload to, which needs to be defined before the filter graph is created which is done with **-vaapi_device**. | * The **hwupload** filter also requires a device to upload to, which needs to be defined before the filter graph is created which is done with **-vaapi_device**. | ||
| * The **scale_vaapi=w=1920: | * The **scale_vaapi=w=1920: | ||
| - | * Use **-vf ' | + | * Use **-vf ' |
| + | * Use **-vf ' | ||
| + | * See further below for other pixel formats.. | ||
| * **-map 0:v** selects the Video streams from the inputs which will go into the output. | * **-map 0:v** selects the Video streams from the inputs which will go into the output. | ||
| * **-metadata: | * **-metadata: | ||
| Line 80: | Line 97: | ||
| * **-c:a copy** copies the Audio streams without modification to the output. | * **-c:a copy** copies the Audio streams without modification to the output. | ||
| * **-c:s copy** copies the Subtitle streams without modification to the output. | * **-c:s copy** copies the Subtitle streams without modification to the output. | ||
| - | * **-rc_mode CQP** sets the rate control mode to COP. | + | * **-rc_mode CQP** sets the rate control mode to CQP. |
| - | * COP works well. | + | * CQP works well. |
| * < | * < | ||
| Run the following to see all possible modes: <code bash> | Run the following to see all possible modes: <code bash> | ||
| Line 114: | Line 131: | ||
| </ | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ===== Using other pixel formats ===== | ||
| + | |||
| + | Check which pixel formats are supported: | ||
| + | |||
| + | <code bash> | ||
| + | ffmpeg -pix_fmts | ||
| + | </ | ||
| + | |||
| + | returns | ||
| + | |||
| + | < | ||
| + | Pixel formats: | ||
| + | I.... = Supported Input format for conversion | ||
| + | .O... = Supported Output format for conversion | ||
| + | ..H.. = Hardware accelerated format | ||
| + | ...P. = Paletted format | ||
| + | ....B = Bitstream format | ||
| + | FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL BIT_DEPTHS | ||
| + | ----- | ||
| + | IO... yuv420p | ||
| + | IO... yuyv422 | ||
| + | ... | ||
| + | ... | ||
| + | IO... nv12 | ||
| + | IO... p010le | ||
| + | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | <WRAP info> | ||
| + | **NOTE:** When using a different pixel format, usually the following options will need to be set: | ||
| + | |||
| + | * -vf ' | ||
| + | * -vf ' | ||
| + | * -vf ' | ||
| + | |||
| + | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ==== Encode with 8-bit ==== | ||
| + | |||
| + | ^Format^Chroma sampling^Packed or planar^Bits per channel^ | ||
| + | |NV12|4: | ||
| + | |||
| + | <code bash> | ||
| + | ffmpeg -i " | ||
| + | |||
| + | ffmpeg -i " | ||
| + | </ | ||
| + | |||
| + | ==== Encode with 10-bit ==== | ||
| + | |||
| + | ^Format^Chroma sampling^Packed or planar^Bits per channel^ | ||
| + | |P010|4: | ||
| + | |||
| + | <code bash> | ||
| + | ffmpeg -i " | ||
| + | |||
| + | ffmpeg -i " | ||
| + | </ | ||
| + | |||
| + | ==== Encode with 16-bit ==== | ||
| + | |||
| + | ^Format^Chroma sampling^Packed or planar^Bits per channel^ | ||
| + | |P010|4: | ||
| + | |||
| + | <code bash> | ||
| + | ffmpeg -i " | ||
| + | |||
| + | ffmpeg -i " | ||
| + | </ | ||
ffmpeg/encoding/gpu_encoding.1718093058.txt.gz · Last modified: 2024/06/11 08:04 by peter