Odroid C2 mpeg4 hardware accelleration

kimbaz · October 8, 2018 at 6:52 PM

Hello,

I noticed that the mpeg4 video files are played using software acceleration on my C2.

Does anyone know if there is a specific reason why they are not hw accelerated like h264 or h265?

Thank you
Regards

**chewitt** · October 8, 2018 at 10:43 PM Official Post

MPEG-4 is a container format so I'd guess the video is encoded with an unsupported bit-depth like 10-bit H.264 (the H.264 standard and thus all hardware built to follow the standard specifies 8-bit content) and it falls back to software decode.

mediainfo for the file or a Kodi debug log during playback will confirm the hunch.

kimbaz · October 9, 2018 at 12:34 AM

Thanks chewitt I'll double check it.

kimbaz · October 9, 2018 at 6:57 PM

I just got this information from the media info during the playback:
Video decoder: ff-mpeg4 (SW)
Pixel format: yuv420p
...: yadif=1:-1:1
Video track: 640x256 px, 2.50 AR, 25.000 FPS
...

**smp** · October 9, 2018 at 7:17 PM

Quote from kimbaz

I just got this information from the media info during the playback:

MediaInfo download | SourceForge.net

kimbaz · October 9, 2018 at 7:52 PM

smp thanks.

Here is the video output

Code

Format/String                    : AVI
Format/Info                      : Audio Video Interleave
OverallBitRate/String            : 1 543 kb/s
Encoded_Application/String       : VirtualDubMod 1.5.10.2 (build 2540/release)
Encoded_Library/String           : VirtualDubMod build 2540/release

Video
ID/String                        : 0
Format/String                    : MPEG-4 Visual
Format_Profile                   : Advanced Simple@L5
Format_Settings                  : BVOP2 / QPel
Format_Settings_BVOP/String      : 2
Format_Settings_QPel/String      : Yes
Format_Settings_GMC/String       : No warppoints
Format_Settings_Matrix/String    : Default (MPEG)
MuxingMode                       : Packed bitstream
CodecID                          : XVID
CodecID/Hint                     : XviD
BitRate/String                   : 1 150 kb/s
Width/String                     : 640 pixels
Height/String                    : 256 pixels
DisplayAspectRatio/String        : 2.500
FrameRate/String                 : 25.000 FPS
ColorSpace                       : YUV
ChromaSubsampling/String         : 4:2:0
BitDepth/String                  : 8 bits
ScanType/String                  : Progressive
Compression_Mode/String          : Lossy
Bits-(Pixel*Frame)               : 0.281
Encoded_Library/String           : XviD 1.0.3 (UTC 2004-12-20)

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**chewitt** · October 11, 2018 at 4:39 AM Official Post

Odd. Can you pastebin a Kodi debug log.

kimbaz · October 23, 2018 at 9:27 PM

Hi chewitt I just checked the video player settings and the mpeg4 hw acceleration is enabled (by default) only for HD+ content (hw decoder for H265/H264 is always enabled). I read (but unfortunately I can't find the post) that enabling it also for SD can cause issues with the H264 decoder.

Do you think it has been fixed on libreelec 8.2.5.

**chewitt** · October 24, 2018 at 6:21 AM Official Post

No idea, but there's so much dumb crap in the 3.14 kernel it's completely possible.

kimbaz · October 24, 2018 at 9:37 PM

I understand