Hello,
We would like to use the H264 encoder of Jetson to encode a YUV 4:4:4 (Y444 or NV24) with lossless feature and High444 predictive profile but we have some issues with the result: for both NV24 and Y444, the encoder is reading the buffer as a YUV 4:2:0 instead of a YUV 4:4:4 while the NvBuffer provided is allocated as a YUV444!..
In checking the H264 output, we can notice that the profile is not PREDICTIVE but INTRA with YUV 4:2:0 as shown in the ffplay command output below:
$ ffplay test.h264
...
Input #0, h264, from 'test.h264': 0KB vq= 0KB sq= 0B f=0/0
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Intra), yuv420p(progressive), 1280x720, 25 fps, 25 tbr, 1200k tbn
nan M-V: nan fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0
To reproduce with Jetson 36.3 or 35.4.1:
# Generate a YUV 4:4:4 multi-planar file (Y444
gst-launch-1.0 videotestsrc num-buffers=10 ! video/x-raw,format=Y444,width=1280,height=720 ! filesink location=/tmp/test.yuv
# Encode with multi-planar
./video_encode /tmp/test.yuv 1280 720 H264 /tmp/test.h264 --elossless -p high444
# Generate a YUV 4:4:4 semi-planar file (NV24)
gst-launch-1.0 videotestsrc num-buffers=10 ! video/x-raw,format=NV24,width=1280,height=720 ! filesink location=/tmp/test.yuv
# Encode the file
./video_encode /tmp/test.yuv 1280 720 H264 /tmp/test.h264 --elossless -p high444 --sp
Then, check the output with ffplay:
ffplay /tmp/test.h264
The expected output would be:
# Encode the YUV 4:4:4 multi-planar (Y444) with x264
gst-launch-1.0 filesrc location=/tmp/test.yuv ! rawvideoparse format=y444 width=1280 height=720 ! x264enc quantizer=0 pass=4 ! filesink location=/tmp/test.h264
# Check expected output:
# -> Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1200k tbn
ffplay /tmp/test.h264
Can you double check this issue?
Thank you very much!
Best regards,
Alex