[Libva] CBR encoding fails

[Zhao, Yakui]

On Sun, 2014-07-20 at 11:34 -0600, Artem Makhutov wrote:
> Hello,
> 
> I am trying to do CBR encoding of a video.
> 
> I am using lates git master of libva and libva-intel-drivers.
> 
> Before commit "745340dd013399f64507de73401ab3adb712dad5 in intel-drivers (Encoding: Use the different delimeter to pass packed_rawdata and slice_header based on VAConfigAttribEncPackedHeaders attribute)" it just segfaults in intel_mfc_brc_prepare.
> After this commit I am getting this:
> 
> h264encode -w 1920 -h 1080 --srcyuv /tmp/123.yuv -f 25 -n 0 --rcmode CBR --bitrate 8500000
> Source YUV file /tmp/123.yuv with 1376 frames
> Source frame is 1920x1080 and will code clip to 1920x1088 with crop

Thanks for reporting this issue.

Will you please try to use the avcenc tool and see whether the CBR
encoding can work for you? The following is the CBR command:
   >avcenc width height source_input output fb=XXX mode=0/1/2( 0 means
that  the clip is encoded with all-I frames. 1 means that it is encoded
with I and P frames. 2 means that it is encoded with I/P/B frames).

For some history reasons there exist two encoding test_case in
libva(avcenc and h264encode). For the libva-intel-driver, it will be
better that the avcenc tool is preferred. After some
features/enhancements are added in the libva-intel-driver, avcenc will
be updated.

Thanks.
    Yakui

> 
> 
> INPUT:Try to encode H264...
> INPUT: RateControl  : CBR
> INPUT: Resolution   : 1920x1080, 1376 frames
> INPUT: FrameRate    : 25
> INPUT: Bitrate      : 8500000
> INPUT: Slieces      : 1
> INPUT: IntraPeriod  : 30
> INPUT: IDRPeriod    : 60
> INPUT: IpPeriod     : 1
> INPUT: Initial QP   : 26
> INPUT: Min QP       : 0
> INPUT: Source YUV   : FILE:/tmp/123.yuv (fourcc NV12)
> INPUT: Coded Clip   : /tmp/test.264
> INPUT: Rec   Clip   : Not save reconstructed frame
> 
> 
> libva info: VA-API version 0.35.2
> libva info: va_getDriverName() returns 0
> libva info: Trying to open /usr/lib64/va/drivers/i965_drv_video.so
> libva info: Found init function __vaDriverInit_0_35
> libva info: va_openDriver() returns 0
> Use profile VAProfileH264High
> Support rate control mode (0x12):CBR CQP
> Support VAConfigAttribEncPackedHeaders
> Support packed sequence headers
> Support packed picture headers
> Support packed slice headers
> Support packed misc headers
> Support 1 RefPicList0 and 1 RefPicList1
> WARNING: packed slice_header data is missing for some slice under packed SLICE_HEADER mode
> encode_frames:vaEndPicture (2013) failed,exit
> 
> Also any stable releases segfaults when trying to encode CBR.
> 
> Any chance to fix it?
> 
> Thanks, Artem
> 
>