Am Montag, den 16.06.2014, 10:24 +0200 schrieb Hans Verkuil: > On 06/13/2014 06:08 PM, Philipp Zabel wrote: > > This disables forcing IDR frames at GOP size intervals on CODA7541 and CODA960, > > which is only needed to work around a firmware bug on CodaDx6. > > Instead, the V4L2_BUF_FLAG_KEYFRAME v4l2 buffer flag is cleared before marking > > the source buffer done for dequeueing. Userspace can set it before queueing a > > frame to force an IDR frame, to implement VFU (Video Fast Update). > > I'd like to see an RFC for this feature. Rather than 'misuse' it, I think this > should be standardized. I have nothing against using KEYFRAME in order to > implement VFU (in fact, I like it!), but it should be documented and well-defined. Thanks, I'll prepare a separate RFC for this. The other possibility would be to use a V4L2_ENC_CMD for this feature. One thing I'm not sure about is how to signal to userspace that this feature is available when using the KEYFRAME clearing. With encoder commands, TRY_COMMAND could be used. But when using the buffer KEYFRAME bits, I suppose a flag would have to be introduced somewhere? regards Philipp -- 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
