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--- ffmpeg:hardware_acceleration_using_gpu:amd_gpu [2024/02/19 11:30] – peter
+++ ffmpeg:hardware_acceleration_using_gpu:amd_gpu [2024/05/15 00:03] (current) – peter
@@ Line 1: / Line 1: @@
 ====== ffmpeg - Hardware transcoding using GPUs - AMD GPU ======
+===== Basic method =====
 <code bash>
+ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i "input.mkv" -map 0:v -metadata:s:v:0 language=eng -map 0:a -metadata:s:a:0 language=eng -map 0:s? -metadata:s:s:0 language=eng -c:v hevc_vaapi -c:a copy -c:s copy -global_quality 28 "output.mkv"
 ffmpeg -i "input.mkv" -vaapi_device /dev/dri/renderD128 -vcodec hevc_vaapi -vf format='nv12|vaapi,hwupload' -map 0 -c:a copy -c:s copy -qp 23 "output.mkv"
 </code>
-<WRAP info>
-**NOTE:**
-  * **-vaapi_device /dev/dri/renderD128**, which is a shortcut to **-init_hw_device vaapi=vaapi0:/dev/dri/renderD128 -filter_hw_device vaapi0**, initializes a new hardware device of type vaapi.
-  * **-vcodec hevc_vaapi**
-  * **-vf 'format=nv12,hwupload'** creates the filtergraph and uses it to filter the stream.
-    * 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).
-    * 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**.
-</WRAP>
 ----
-<WRAP info>
+===== Step-by-step guide to the above mentioned method =====
-**NOTE:**  To figure out for which codecs GPU hardware video encoding acceleration can be used vainfo command provides some information:
+==== Determine which codecs can be used with GPU hardware video encoding acceleration ====
 <code bash>
@@ Line 59: / Line 50: @@
 </code>
-  * For all entries with a value of VAEntrypointEncSlice hardware encoding can be used.
+<WRAP info>
+**NOTE:**  For all entries with a value of **VAEntrypointEncSlice** hardware encoding can be used.
+In this case this shows the following as able to hardware encode: <code>
+      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSlice
+      VAProfileH264Main               :	VAEntrypointEncSlice
+      VAProfileH264High               :	VAEntrypointEncSlice
+      VAProfileHEVCMain               :	VAEntrypointEncSlice
+      VAProfileHEVCMain10             :	VAEntrypointEncSlice
+      VAProfileAV1Profile0            :	VAEntrypointEncSlice
+</code>
 </WRAP>
+----
+==== Check what vaapi encoders are supported by ffmpeg ====
+<code bash>
+ffmpeg -encoders | grep vaapi
+</code>
+returns:
+<code>
+ffmpeg version N-113695-g32538dafca Copyright (c) 2000-2024 the FFmpeg developers
+  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
+  configuration: --prefix=/home/peter/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/peter/ffmpeg_build/include --extra-ldflags=-L/home/peter/ffmpeg_build/lib --extra-libs='-lpthread -lm' --ld=g++ --bindir=/home/peter/bin --enable-gpl --enable-gnutls --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libsvtav1 --enable-libdav1d --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --extra-libs=-lpthread
+  libavutil      58. 39.100 / 58. 39.100
+  libavcodec     60. 39.101 / 60. 39.101
+  libavformat    60. 21.100 / 60. 21.100
+  libavdevice    60.  4.100 / 60.  4.100
+  libavfilter     9. 17.100 /  9. 17.100
+  libswscale      7.  6.100 /  7.  6.100
+  libswresample   4. 13.100 /  4. 13.100
+  libpostproc    57.  4.100 / 57.  4.100
+ V....D av1_vaapi            AV1 (VAAPI) (codec av1)
+ V....D h264_vaapi           H.264/AVC (VAAPI) (codec h264)
+ V....D hevc_vaapi           H.265/HEVC (VAAPI) (codec hevc)
+ V....D mjpeg_vaapi          MJPEG (VAAPI) (codec mjpeg)
+ V....D mpeg2_vaapi          MPEG-2 (VAAPI) (codec mpeg2video)
+ V....D vp8_vaapi            VP8 (VAAPI) (codec vp8)
+ V....D vp9_vaapi            VP9 (VAAPI) (codec vp9)
+</code>
+<WRAP info>
+**NOTE:**  This confirms that ffmpeg supports the following vaapi codecs:
+<code>
+ V....D av1_vaapi            AV1 (VAAPI) (codec av1)
+ V....D h264_vaapi           H.264/AVC (VAAPI) (codec h264)
+ V....D hevc_vaapi           H.265/HEVC (VAAPI) (codec hevc)
+ V....D mjpeg_vaapi          MJPEG (VAAPI) (codec mjpeg)
+ V....D mpeg2_vaapi          MPEG-2 (VAAPI) (codec mpeg2video)
+ V....D vp8_vaapi            VP8 (VAAPI) (codec vp8)
+ V....D vp9_vaapi            VP9 (VAAPI) (codec vp9)
+</code>
+</WRAP>
+----
+----
+<code bash>
+ffmpeg -i "input.mkv" -vaapi_device /dev/dri/renderD128 -vcodec hevc_vaapi -vf format='nv12|vaapi,hwupload' -map 0 -c:a copy -c:s copy -qp 23 "output.mkv"
+</code>
+<WRAP info>
+**NOTE:**
+  * **-vaapi_device /dev/dri/renderD128**, which is a shortcut to **-init_hw_device vaapi=vaapi0:/dev/dri/renderD128 -filter_hw_device vaapi0**, initializes a new hardware device of type vaapi.
+  * **-vcodec hevc_vaapi**
+  * **-vf 'format=nv12,hwupload'** creates the filtergraph and uses it to filter the stream.
+    * 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).
+    * 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**.
+  * **-map 0 -c:a copy -c:s copy**:  This causes to copy the audio streams and sub without modification to the new file.
+  * **-map 0:a -c:a copy**: This causes to copy the audio streams without modification to the new file.
+  * **-qp 23**:  The video quality.
+    * The lower the value, the better will be the video quality, but also the files will be larger.
+    * The default value is 25 which is fairly good.
+    * For high-definition videos a value between 21-23 works best and produces good results.
+</WRAP>
+----
@@ Line 136: / Line 219: @@
 ----
+===== References =====
+  * [[https://en.wikipedia.org/wiki/Video_Acceleration_API|vaapi]]