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35 lines
1.6 KiB
Markdown
35 lines
1.6 KiB
Markdown
# Video decode memory sample
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The video decode memory sample illustrates a way to pass the data chunk-by-chunk sequentially to the FFMPEG demuxer which is then decoded on AMD hardware using rocDecode library.
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The sample provides a user class `FileStreamProvider` derived from the existing `VideoDemuxer::StreamProvider` to read a video file and fill the buffer owned by the demuxer. It then takes frames from this buffer for further parsing and decoding.
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## Prerequisites:
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* Install [rocDecode](https://rocm.docs.amd.com/projects/rocDecode/en/latest/install/rocDecode-build-and-install.html)
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* [FFMPEG](https://ffmpeg.org/about.html)
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```shell
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sudo apt install libavcodec-dev libavformat-dev libavutil-dev
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```
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## Build
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```shell
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mkdir video_decode_mem_sample && cd video_decode_mem_sample
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cmake ../
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make -j
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```
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## Run
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```shell
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./videodecodemem -i <input video file [required]>
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-o <output path to save decoded YUV frames [optional]>
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-d <GPU device ID - 0:device 0 / 1:device 1/ ... [optional - default:0]>
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-z <force_zero_latency - Decoded frames will be flushed out for display immediately [optional]>
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-sei <extract SEI messages [optional]>
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-crop <crop rectangle for output (not used when using interopped decoded frame) [optional - default: 0,0,0,0]>
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-m <output_surface_memory_type - decoded surface memory [optional - default: 0][0 : OUT_SURFACE_MEM_DEV_INTERNAL/ 1 : OUT_SURFACE_MEM_DEV_COPIED/ 2 : OUT_SURFACE_MEM_HOST_COPIED/ 3 : OUT_SURFACE_MEM_NOT_MAPPED]>
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``` |