Hi Randy, > From: randy [mailto:lxr1234@xxxxxxxxxxx] > Sent: Thursday, January 02, 2014 12:35 PM > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hello > > I have follow the README of the v4l2-mfc-encoder from the > http://git.infradead.org/users/kmpark/public-apps > it seems that I can use the mfc encoder in exynos4412(using 3.5 kernel > from manufacturer). So it is not the mainline kernel. Could you give a link to this kernel? I have doubts that this kernel is using the open source driver. The driver present in that kernel could be a significantly modified driver. > But I have a problem with the contain of the README and I can't get the > key frame(the I-frame in H.264). It said that "6. Enqueue CAPTURE > buffers. > 7. Enqueue OUTPUT buffer with first frame. > 8. Start streaming (VIDIOC_STREAMON) on both ends." > so I shall enqueue buffer before start stream, to enqueue a buffer, I > need to dequeue first, but without start stream, it will failed in both > side. I think I don't understand this. You should enqueue the buffers and then start streaming. I think dequeueing is not mentioned here. First enqueue then dequeue. > In this way I start OUTPUT(input raw video) stream first then dequeue > and enqueue the first frame, then I start the CAPTURE(output encoded > video) frame, dequeue CAPTURE to get a buffer, get the data from buffer > then enqueue the buffer. The first frame of CAPTURE is always a > 22 bytes > frame(I don't know whether they are the same data all the time, but > size is the same from m.planes[0].bytesused), but it seems not a key > frame. > > What is the problem, and how to solve it. > > P.S I don't test the Linux 3.13-rc4, as the driver is not ready for > encoder before. > > Thank you > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iQEcBAEBAgAGBQJSxU74AAoJEPb4VsMIzTzi2oEH/1JJqfeZhMwogvWSVz+M3J4Y > 2Bnej0RBBKF0Gu508IWrHy9t+DPg3c3wJt1M0j+GtUsv2Q+Jl2vlmDTLV/Gafzo6 > xywye4raHpqHreFv4Q55SIseDbfV79eO84uv4RuV/fXEuPpo1MlZf9SOGCiAfoQI > ozxqoOPD2l2VaSA/351gtT93lkOREF2EnmVf2Wa31WWHw0LV3aoY9/OosxOiY9Fy > mVHHpYheDwHXdPfrxHXWKEA5GOJ7h0ozc66MPe7JInKSGdUcDrdrFxdSVwyZ/21B > Oc2Aw9RMd85NwjXBc9hYH++3f73tcVhzMCF7Swyb+bsn4Mzyr64Bn4VsYaDqiCc= > =HCKX > -----END PGP SIGNATURE----- Best wishes, -- Kamil Debski Samsung R&D Institute Poland -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
