Hi Javier, (Cc Kamil.) On Wed, Mar 14, 2012 at 12:22:43PM +0100, javier Martin wrote: > Hi, > I'm developing a V4L2 mem2mem driver for the codadx6 IP video codec > which is included in the i.MX27 chip. > > The capture interface of this driver can therefore return h.264 or > mpeg4 video frames. > > Provided that the size of each frame varies and is unknown to the > user, how is the driver supposed to react to a S_FMT when it comes to > parameters such as the following? > > pix->width > pix->height > pix->bytesperline > pix->sizeimage > > According to the documentation [1] I understand that the driver can > just ignore 'bytesperline' and should return in 'sizeimage' the > maximum buffer size to store a compressed frame. However, it does not > mention anything special about width and height. Does it make sense > setting width and height for h.264/mpeg4 formats? It does. This has been recently discussed, and there were a few ideas how to do this. But no final conclusion AFAIR. <URL:http://www.spinics.net/lists/linux-media/msg40905.html> Kamil: do you have plans to update the RFC? Kind regards, -- Sakari Ailus e-mail: sakari.ailus@xxxxxx jabber/XMPP/Gmail: sailus@xxxxxxxxxxxxxx -- 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
