To be fair, Roku's OS/firmware programming team is inept at best, and though it is clearly capable of coding SoC-specific fixes (based on past model-specific firmware development), obviously has not done so with these RTD131 x issues, perhaps because Roku has utterly de-prioritized local/LAN playback (look at the abysmal state of RMP development/etc), otherwise this should/would have been easily addressed soon after the 4800's launch. Roku have shown no real interest (beyond the obligatory request for details) in fixing/addressing this issue for nearly 2 years, and so it remains unfixed - not unlike other similar issues such as the x.265/HEVC +EAC3 color/contrast distortion issues, also impacted by tagging/encoding library. If other models of Roku players work fine with DTS MKV files, then Roku should be able to fix this issue with the an FYI, but this DTS stuttering issue (with MKVs depending on tagging/encoding library) has existed with the 4800 since launch (fall 2020) and impacts ALL new models using the Realtek RTD131 x SoC family - this includes the Ultra LT/Ultra (4801/4800/4802), Express 4K/4K+ (3940/3941), and the Streaming Stick 4K/4K+ (3820/3821). Hopefully Roku will solve this issue on the 4800X, because I shouldn't have to remux all of my MKVs using Avidemux. The transcoding of the audio would have to be done by the DLNA server app (Mezzmo). I don't think the Roku Ultra can transcode audio, despite what is mentioned in this thread. I tried forcing the Roku to transcode the DTS into Dolby Digital by disabling DTS in the audio output settings, but I get no audio.
#UNIVERSAL MEDIA SERVER STUTTERING SOFTWARE#
And I am using a Roku Ultra 4800X with the latest software version, 11. I am streaming them from my DLNA server app, Mezzmo. It is only the Roku Media Player that has trouble with these DTS MKVs. All other media players I have used play all of my MKV files fine. Both Handbrake and Avidemux use the Lavf58 encoder, so those apps create working MKV files. DTS MKV files created using the Lavf58 encoder (Libav format) work fine. My troubleshooting appears to show that DTS MKV files created using the libEBML and libMatroska writing library (MKVToolNix format) have the stuttering problem in Roku Media Player. This thread has been very helpful in troubleshooting, especially your tips, I've opened a support request with Roku support (Support Request # 5811779), so I will see where that goes. I am experiencing this same problem with DTS MKV files and video stutter.
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