admin管理员组

文章数量:1417550

I'm facing the issue while testing hw accelirated decoding in Chromium. After some investigation I found out that at the start of decoding Chromuim calls VIDIOC_STREAMON ioctl first and the starts to transmit buffers by calling VIDIOC_QBUF for OUTPUT (filled with data for hw decoder) buffer. And such sequence leads to inappropriate buffer management in v4l2 video decoder driver. For comparison, Gstreamer uses reverse sequence, when it sends buffers with VIDIOC_QBUF first and then runs streaming via calling VIDIOC_STREAMON. And in case of decoding with Gsteamer there are no any problems with queueing buffers in decoder driver.

So my question is, is it valid to use such a sequence for v4l2, when VIDIOC_STREAMON ioctl is called before VIDIOC_QBUF?

P.S.: I read the docs ( ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF and ioctl VIDIOC_QBUF, VIDIOC_DQBUF ) but didn't find the answer to my question there.

本文标签： gstreamerUsing VIDIOCSTREAMON and VIDIOCQBUFStack Overflow

版权声明：本文标题：gstreamer - Using VIDIOC_STREAMON and VIDIOC_QBUF - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1745267900a2650714.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。