About the reasons that trigger video transcoding

[Sailence 0]

When I try to play a video with "Format profile: High@L5.2," transcoding is triggered. I use the ffmpeg command "ffmpeg -i "input.mp4" -c copy -bsf:v h264_metadata=level=51 "output.mp4"" to convert it to Level 5.1, and it plays without transcoding. Using other video players (such as MXplayer), you can play videos with "Format profile: High@L5.2" normally. What causes this? How can I play videos with "Format profile: High@L5.2" directly?

Android tablet：OnePlus pad 3

Android version：15

System version：OxygenOS 15.0.1.801

Emby for Android version：3.5.12

General
Complete name                  : C:\Users\q0pu\Desktop\ls\test.mp4
Format                         : MPEG-4
Format profile                 : Base Media
Codec ID                       : isom (isom/iso2/avc1/mp41)
File size                      : 1.16 GiB
Duration                       : 4 min 13 s
Overall bit rate               : 39.3 Mb/s
Frame rate                     : 59.940 FPS
Writing application            : Lavf61.9.107

Video
ID                             : 1
Format                         : AVC
Format/Info                    : Advanced Video Codec
Format profile                 : High@L5.2
Format settings                : CABAC / 4 Ref Frames
Format settings, CABAC         : Yes
Format settings, Reference fra : 4 frames
Codec ID                       : avc1
Codec ID/Info                  : Advanced Video Coding
Duration                       : 4 min 13 s
Bit rate                       : 39.0 Mb/s
Width                          : 3 840 pixels
Height                         : 2 160 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 59.940 (60000/1001) FPS
Color space                    : YUV
Chroma subsampling             : 4:2:0
Bit depth                      : 8 bits
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 0.078
Stream size                    : 1.15 GiB (99%)
Writing library                : AVC Coding
Language                       : English
Color range                    : Limited
Color primaries                : BT.709
Transfer characteristics       : BT.709
Matrix coefficients            : BT.709
Codec configuration box        : avcC

emby_android_1760911870868.txt

[Luke 42077]

Quote

When I try to play a video with "Format profile: High@L5.2," transcoding is triggered.

Hi there, did you explore the stats feature in the video player to learn why it was transcoding? What did it say?

[Sailence 0]

5 hours ago, Luke said:

Hi there, did you explore the stats feature in the video player to learn why it was transcoding? What did it say?
你好，你探索过视频播放器中的统计功能来了解为什么进行转码吗？它说了什么？

“Stats for Nerds” As shown in the figure below.

Emby server ffmpeg-transcode log.

ffmpeg-transcode-89e03c19-43ff-4f82-8529-0daeb3dc9ff5_1.txt