<div dir="ltr">For that size of frame, 20ms is a pretty darn good time IMO. šWe see 10ms (ish) on things in the 1280x720 range.<div> </div><div>Since your input stream is only 25fps, the encoder will be able to provide near real-time output, with just a 20ms delay before writing each frame.</div> <div> </div><div>If you were trying to do 60fps then you wouldn't be able to do "real time" at all since you'd be falling behind 5ms every frame.</div></div><div class="gmail_extra"> <div class="gmail_quote"> On Thu, Mar 27, 2014 at 5:57 AM, Nik Orlov <<a href="mailto:nikitos1550@yandex.ru" target="_blank">nikitos1550@yandex.ru</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hello! I have ubuntu-desktop 13.10 amd64 on core i7 4770 (Haswell, HD graphics 4600). I have installed vaapi (libva from sources 1.3.0). There is h264encode test. I have started it: user@video-ubuntu:~/VAAPI/libva-1.3.0/test/encode$ ./h264encode -w 3840 -h 1080 -framecount 1 -f 25 Source frame is 3840x1080 and will code clip to 3840x1088 with crop INPUT:Try to encode H264... INPUT: RateControl š: VBR INPUT: Resolution š : 3840x1080, 1 frames INPUT: FrameRate š š: 25 INPUT: Bitrate š š š: 24883200 INPUT: Slieces š š š: 1 INPUT: IntraPeriod š: 30 INPUT: IDRPeriod š š: 60 INPUT: IpPeriod š š : 1 INPUT: Initial QP š : 26 INPUT: Min QP š š š : 0 INPUT: Source YUV š : AUTO generated INPUT: Coded Clip š : /tmp/test.264 INPUT: Rec š Clip š : Not save reconstructed frame libva info: VA-API version 0.35.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/local/lib/dri/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 misc headers Support 1 RefPicList0 and 1 RefPicList1 Loading data into surface 15.....Complete surface loading š š š |00000000(485835 bytes coded) PERFORMANCE: š Frame Rate š š š š š : 0.06 fps (1 frames, 16500 ms (16500.00 ms per frame)) PERFORMANCE: š Compression ratio š š: 12:1 PERFORMANCE: š š UploadPicture š š š: 16444 ms (16444.00, 99.66% percent) PERFORMANCE: š š vaBeginPicture š š : 0 ms (0.00, 0.00% percent) PERFORMANCE: š š vaRenderHeader š š : 0 ms (0.00, 0.00% percent) PERFORMANCE: š š vaEndPicture š š š : 3 ms (3.00, 0.02% percent) PERFORMANCE: š š vaSyncSurface š š š: 32 ms (32.00, 0.19% percent) PERFORMANCE: š š SavePicture š š š š: 0 ms (0.00, 0.00% percent) PERFORMANCE: š š Others š š š š š š : 21 ms (21.00, 0.13% percent) (Multithread enabled, the timing is only for reference) And other way user@video-ubuntu:~/VAAPI/libva-1.3.0/test/encode$ ./h264encode -w 3840 -h 1080 -framecount 2500 -f 25 Source frame is 3840x1080 and will code clip to 3840x1088 with crop INPUT:Try to encode H264... INPUT: RateControl š: VBR INPUT: Resolution š : 3840x1080, 2500 frames INPUT: FrameRate š š: 25 INPUT: Bitrate š š š: 24883200 INPUT: Slieces š š š: 1 INPUT: IntraPeriod š: 30 INPUT: IDRPeriod š š: 60 INPUT: IpPeriod š š : 1 INPUT: Initial QP š : 26 INPUT: Min QP š š š : 0 INPUT: Source YUV š : AUTO generated INPUT: Coded Clip š : /tmp/test.264 INPUT: Rec š Clip š : Not save reconstructed frame libva info: VA-API version 0.35.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/local/lib/dri/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 misc headers Support 1 RefPicList0 and 1 RefPicList1 Loading data into surface 15.....Complete surface loading š š š \00002499(719089 bytes coded) PERFORMANCE: š Frame Rate š š š š š : 53.70 fps (2500 frames, 46555 ms (18.62 ms per frame)) PERFORMANCE: š Compression ratio š š: 11:1 PERFORMANCE: š š UploadPicture š š š: 16364 ms (6.55, 35.15% percent) PERFORMANCE: š š vaBeginPicture š š : 2 ms (0.00, 0.00% percent) PERFORMANCE: š š vaRenderHeader š š : 18 ms (0.01, 0.04% percent) PERFORMANCE: š š vaEndPicture š š š : 1098 ms (0.44, 2.36% percent) PERFORMANCE: š š vaSyncSurface š š š: 21385 ms (8.55, 45.93% percent) PERFORMANCE: š š SavePicture š š š š: 8759 ms (3.50, 18.81% percent) PERFORMANCE: š š Others š š š š š š : -1071 ms (1717986.49, 9225574.54% percent) (Multithread enabled, the timing is only for reference) So, when test encodes more frames time for encoding 1 frame is about 20ms. Why it is so? My primary question, if I want to encode video in real time (It means camera sends me frame each 40ms), what time for encoding 1 frame I will get? As I understand programm sends some data to GPU, GPU encodes video and then send me encoded data back. How much time takes sending data to GPU and back? Maybe it will possible to encode each frame in real time, or maybe it isn`t possible, but It is possible to keep some buffer (for example for 25 frames - 1 sec of video) and than encode ot very fast. -- îÉË ďŇĚĎ× mailto:<a href="mailto:nikitos1550@yandex.ru">nikitos1550@yandex.ru</a> _______________________________________________ Libva mailing list <a href="mailto:Libva@lists.freedesktop.org">Libva@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/libva" target="_blank">http://lists.freedesktop.org/mailman/listinfo/libva</a> </blockquote></div> </div>