Problem with stuttering in video 4k h264(hw)

Hey, everybody.

Found a problem on ODROID N2 when playing 4K h264.

jellyfish-140-mbps-4k-uhd-h264 and above all stutter.
There’s no smoothness.

4K h265 works fine.
Tried both stable and night builds - all the same.
Playing over network - via NFS or SMB, all the same.
LG OLED 65C9 TV.

Test for hours at 50 and 60 hertz shows wild frame rates (see screenshots).
At 30, there’s no more frame skips.

What should I do?

Use a lower bitrate?

1 Like

It’s already low on the test with the watch. But he’s skipping frames.

Forget the jellyfish. There’s a bitrate, crookedly coded.
But where the frame skips at 50 and 60 hertz come from. Amlogic can’t h264 over 30 hertz?

S922x specification:
H.264 AVC HP@L5.1 up to 4Kx2K@30fps
H.264 MVC up to 1080P@60fps
H.265 HEVC MP-10@L5.1 up to 4Kx2K@60fps

Thank you. I opened the datasheet on the S922x - that’s exactly what it is.
Everywhere on the sites is written without sharing h265.
The question is closed.

sorry in advance for being a bit out-of-topic: which test videos did you use in your photos (the ones with the 30/50/60 “clock”)?

This is where you can look.
Section number four.

1 Like

I didn’t know that there is H264 4K video, the size must be so huge! Is there finally an interest to encode 4k in H264 against H265?


I feel that there is no benefit to use H264 4K, but for the picture quality, it depends of the bitrate chosen during the encode so…

thanks alot, awesome selection of test videos!

I uploaded a H264 4K@30hz sample video Dubai.mp4 248MB,
Play with latest nightbuild(20200605) on N2, a lot skips.

General
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (mp42/mp41)
File size                                : 248 MiB
Duration                                 : 2 min 6 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 16.4 Mb/s
Encoded date                             : UTC 2015-09-16 11:11:06
Tagged date                              : UTC 2015-09-16 11:11:36
TIM                                      : 00:00:00:00
TSC                                      : 30000
TSZ                                      : 1001
IsTruncated                              : Yes

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L5.1
Format settings                          : CABAC / 3 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 3 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 2 min 6 s
Bit rate                                 : 98.0 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 29.970 (30000/1001) FPS
Minimum frame rate                       : 29.970 FPS
Maximum frame rate                       : 30.000 FPS
Standard                                 : NTSC
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.394
Language                                 : English
Encoded date                             : UTC 2015-09-16 11:11:06
Tagged date                              : UTC 2015-09-16 11:11:06
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 2 min 6 s
Source duration                          : 2 min 6 s
Bit rate mode                            : Variable
Bit rate                                 : 317 kb/s
Maximum bit rate                         : 438 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 4.80 MiB (2%)
Source stream size                       : 4.80 MiB (2%)
Language                                 : English
Encoded date                             : UTC 2015-09-16 11:11:06
Tagged date                              : UTC 2015-09-16 11:11:06

It works normal on my side on N2.
Check that HDMI Multich PCM chosen in audio settings.

Would you try it on vim3? I have 2 N2 and 1 vim3, on N2, if I check off disable gui scaling then OK, but on vim3, still lots skips

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