KRClark wrote:
Here are issues I am seeing since updating the firmware last night.
(snip) …
MKV files:
This seems to be compeletely broken.
- They take about 3 times as long as they used to before they start playing initially.
- The time counter does not update correctly, as it hesitates for up to 3 seconds at times, and then updates randomly. Sometimes it updates 5 counts over 2 seconds. Sometimes it simply stops updating at all. The problems seem to be repeatable up to the 30-35 second count, but get more glitchy/random after that.
- At exactly 26 seconds (by the counter) the file stops playing back properly. It starts playing in something between 1/4 and 1/2 speed, but also pauses or skips frames at random, and there is no audio while this is happening.
- After the issue in 3, if I tap the control for Fast Forward and press Play again immediately, the file completely pause for about 10-15 seconds as if it is buffering data, then plays back again, though from a bit forward of where it was. Unfortunately, 26 seconds later the pattern repeats. Tapping Rewind and Play has a similar effect sometimes, but only works randomly.
- Trying to skip forward (FF followed by Next) causes various issues at random. Sometimes it just skips to the next file. Sometimes it buffers and continues playing as per 4. Sometimes it skips forward 10 minutes as expected, but immediately goes into the slow down issue from 3, and will not come out of that mode no matter what I do. Sometimes it works as per 3 and 4.
- Even though my setup has “Off” selected for the Subtitles setting, the MKV files always start up showing Subtitle number 1. I can manually turn them off again during playback, but this should not be happening in the first place. This does not happen with any other file type.
(snip) …
I’ve spent a few hours now trying to pin down why 1.04.10 seems to have problems playing some MKV’s over the LAN (I use Windows file shares to a Win7 x64 PC, not DLNA). Note that I say *SOME* MKV’s. Not all MKV’s in my library are having problems as I’ll explain below.
Like you, I have experienced the situation where FF/RW causes a pause of 15-20 seconds before play resumes. However, I noticed this is only with a collection TV series I obtained from my brother. Otherwise they play fne with no stuttering or audio dropout. They are low bit-rate (~1 Mbps) Xvid encodings and MediaInfo reports the writing application was an old version of MKVmerge 2.2. I do not know what my brother’s process/tool flow was for ripping and compressing these videos. In contrast, when I try FF/RW on all my full bit-rate blu-ray and DVD MKV rips, none of them exhibit the FF/RW pause problem!! Furthermore, I used various versions of MKVmerge 4.x (header compression always disabled) to split some of these MKV’s into multiple file chunks (no compression so they are all still full bit-rate) and none of these files exhibit the pause problem. Based on this limited set of evidence, perhaps the FF/RW pause problem is associated with files touched by older versions of MKVmerge.
Regarding the stuttering and audio dropout in #3, I’m having mixed results here as well (again, playing via LAN shares). All the videos I am about to refer to are full bit-rate blu-ray rips. They have video bit-rates of 20 Mbps to 30 Mbps and range in size from 15 Gb to 30 GB. None have been compressed or gone through any splitting. They all played fine with 1.03.29B and 1.03.39B. What I’m seeing is some of these MKV’s will stutter and drop audio within a few minutes of beginning playback. Some MKV’s will play longer before stuttering than others. Some are very prone to stuttering, while others will only stutter a few times and then play stutter-free. If I try to FF/RW after the stuttering begins, playback resumes OK for less than a minute, then often continues to stutter and drop audio. But not all my MKV’s have this problem! Some play just fine with no stuttering at all.
So I’ve been trying to figure out why some of my full-rate blu-ray MKV’s have the stutter problem while others don’t. I’ve been using MediaInfo to look at each file’s characteristics. But so far, I cannot find a common thread among the MKV’s that stutter.
The most interesting MKV’s I have were ripped with both MakeMKV and DVDfab. My Cloverfield MKV’s ripped with MakeMKV (v1.58 and v1.60) suffer from the stuttering problem with 1.04.10 and 1.03.49. However, my Cloverfield MKV ripped with DVDfab 8 does not stutter with any of the latest FW versions!! As a side-note, Cloverfield has a relatively high video bit-rate that averages 31 Mbps.
So I almost came to the conclusion that the last two FW updates are somehow incompatible with full-rate MKV’s created by MakeMKV. But then I tried another movie, Pride & Glory, where I also had both a MakeMKV and DVDfab version. Both versions of Pride & Glory played stutter-free under 1.04.10!
At this point, I still don’t know why some MKV’s stutter under 1.04.1 while others don’t. The only thing I can say for certain is I’m only seeing stuttering on some high bit-rate (20 Mbps to 30 Mbps) blu-ray MKV’s. Some, but not all, of the MKV’s ripped by MakeMKV stutter. None of the MKV’s ripped by DVDfab stutter.