[Question]: How to set hwaccel to StreamGear for utilizing GPU, Using the option ?

[PraveenSuryawanshi-Dev]

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Describe your Question

"-hwaccel auto" before the inputs (-i ) tries to use hardware accelerated but when applied stream_params goes in last which makes problem for ffmpeg and does not utilize GPU.

Terminal log output(Optional)

fmpeg.exe', '-y', '-i', 'sample-mp4-file-small.mp4', '-vcodec', 'libx264', '-vf', 'format=yuv420p', '-aspect', '4:3', '-crf', '20', '-tune', 'zerolatency', '-preset', 'veryfast', '-acodec', 'copy', '-map', '0', '-s:v:0', '320x240', '-b:v:0', '115k', '-b:a:0', '128k', '-map', '0', '-s:v:1', '640x480', '-b:v:1', '500k', '-b:a:1', '96k', '-map', '0', '-s:v:2', '1280x720', '-b:v:2', '500k', '-b:a:2', '128k', '-map', '0', '-s:v:3', '1920x1080', '-b:v:3', '500k', '-b:a:3', '128k', '-bf', '1', '-sc_threshold', '0', '-keyint_min', '30', '-g', '30', '-seg_duration', '5', '-use_timeline', '1', '-use_template', '1', '-adaptation_sets', 'id=0,streams=v id=1,streams=a', '-f', 'dash', '-hwaccel', 'auto', 'dash_out.mpd'

Python Code(Optional)

# Activate Single-Source Mode with valid video input
            stream_params = {
                "-hwaccel": "auto",
                "-video_source": video_src,
                # "-livestream": True,
                "-streams": [
                    {"-resolution": "640x480", "-video_bitrate": "500k"},
                    {"-resolution": "1280x720", "-video_bitrate": "500k"},
                    {"-resolution": "1920x1080", "-video_bitrate": "500k"},
                ],
            }
            # describe a suitable manifest-file location/name and assign params
            streamer = StreamGear(
                output=save_path, format="dash", logging=True, **stream_params
            )
            # trancode source
            streamer.transcode_source()
            # terminate
            streamer.terminate()

VidGear Version

0.3.0

Python version

3.9.12

Operating System version

Windows 10 x64

Any other Relevant Information?

No response

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[abhiTronix]

@PraveenSuryawanshi-Dev Actually, -hwaccel auto is a flag for decoder not for encoder, and StreamGear is a encoder API. Use hardware accelerated FFmpeg encoders like CUDA's NVENC instead with StreamGear API. Here's a example: https://abhitronix.github.io/vidgear/latest/gears/streamgear/rtfm/usage/#usage-with-hardware-video-encoder