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Question: getting raw data out of RGA filters #181

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opened 2025-12-23 10:35:19 +01:00 by backuprepo · 3 comments
backuprepo commented 2025-12-23 10:35:19 +01:00
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Originally created by @oryjkov on GitHub (Jun 13, 2025).

I would like to set up an ffmpeg pipeline that uses RGA filters to scale and crop a video and produce 2 outputs.

  1. hevc_rkmpp -> mp4 file. This works just fine.
  2. vpp_rkrga (format bgr24) -> raw file output. This one fails as it seems that vpp_rkrga has the data in hw buffer and I don't know how to get it out of it.

I managed to make it work with vpp_rkrga -> mjpeg_encoder -> my program -> jpeg decoder.

This works fine, but it seems silly to have JPEG in the middle. Anyway to avoid it?

Originally created by @oryjkov on GitHub (Jun 13, 2025). I would like to set up an ffmpeg pipeline that uses RGA filters to scale and crop a video and produce 2 outputs. 1. `hevc_rkmpp -> mp4 file`. This works just fine. 2. `vpp_rkrga (format bgr24) -> raw file output`. This one fails as it seems that vpp_rkrga has the data in hw buffer and I don't know how to get it out of it. I managed to make it work with `vpp_rkrga -> mjpeg_encoder -> my program -> jpeg decoder`. This works fine, but it seems silly to have JPEG in the middle. Anyway to avoid it?
backuprepo 2025-12-23 10:35:19 +01:00
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backuprepo commented 2025-12-23 10:35:21 +01:00
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@nyanmisaka commented on GitHub (Jun 13, 2025):

... -vf vpp_rkrga=format=bgr24,hwmap=mode=read,format=bgr24 -f rawvideo /path/to/bgr24.rgb
@nyanmisaka commented on GitHub (Jun 13, 2025): ```console ... -vf vpp_rkrga=format=bgr24,hwmap=mode=read,format=bgr24 -f rawvideo /path/to/bgr24.rgb ```
backuprepo commented 2025-12-23 10:35:21 +01:00
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@oryjkov commented on GitHub (Jun 13, 2025):

oh wow, thank you, I'll give this a try

@oryjkov commented on GitHub (Jun 13, 2025): oh wow, thank you, I'll give this a try
backuprepo commented 2025-12-23 10:35:22 +01:00
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@oryjkov commented on GitHub (Jun 13, 2025):

Wonderful, this works. Thanks a lot, appreciate the help.

@oryjkov commented on GitHub (Jun 13, 2025): Wonderful, this works. Thanks a lot, appreciate the help.
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Reference: starred/ffmpeg-rockchip#181
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