Part Number: DRA746
Tool/software: Linux
Hi TI team,
Video 1080p and 60fps is not smooth issue still can be seen. Analyzed from our system team cpu is not high at that time, so it is not CPU loading issue. Can you please help analysis from TI end with gstreamer trace attached. Base on the limitation for attachment side, uploaded video to transfer.harman.com/.../NPeZzE9M3a0rcQSXHDPnFi
(Please visit the site to view this file)
Please see the detail from our developer:
Played “Lamberghini 1080 x 1920.mp4” which is 1080p and 60fps on MMT board via pipeline below and playback is not smooth.
gst-launch-1.0 filesrc location=/tmp/USB1-1.2-sdb1/Lamberghini\ \ \ 1080\ x\ 1920.mp4 ! decodebin ! videoconvert ! waylandsink
We found a lot of buffer from decoder dropped in videoconvert plugin, here is log which is from attachment shows buffer dropped.
0:00:00.776962844 [333m 1016[00m 0xb54027b0 [37mDEBUG [00m [00m basetransform gstbasetransform.c:2038:default_submit_input_buffer:<videoconvert0>[00m handling buffer 0x1f4678 of size 3110400, PTS 0:00:00.250000000 and offset NONE
0:00:00.777206675 [333m 1016[00m 0xb54027b0 [37mDEBUG [00m [00m basetransform gstbasetransform.c:2380:gst_base_transform_chain:<videoconvert0>[00m dropped a buffer, marking DISCONT
We tried to disable QoS in videoconvert, the playback is smooth by playing video via pipeline below:
gst-launch-1.0 filesrc location=/tmp/USB1-1.2-sdb1/Lamberghini\ \ \ 1080\ x\ 1920.mp4 ! decodebin ! videoconvert qos=false ! waylandsink
It seems decoded buffer from decoder is late and resulting qos event to drop buffers in videoconvert, and CPU usage is only around 30% while playing that video.
One more comment, there are lots of services are running on our board, if stops some of them, the performance of playing that video would be got improved. However, no matter stop services or not, the CPU usage is not high.