Hello everyone and thanks for the great tools!
I have problems with playing certain mkv files and it started a few weeks ago. I first thought it was a decoder or renderer problem. I tested the files with a lot of tools (not just mkvinfo & ffprobe) and played it in various players (of course also VLC).
The problem manifests by freezing the frame & dropping the audio for a second and then playing really fast. This happens every few seconds.
I only post here, because the ONLY difference I could find was that the files in questions are merged with a newer version of mkvmerge (mkvmerge v83.0 ‘Circle Of Friends’ 64-bit) and the videos merged with older version work fine.
I am still not sure what the problem exactly is, but I have ruled out a lot of other possibilities like HD failure, Level incompatibility and others.
I can play videos with much higher bitrate than the problematic ones just fine.
I am grateful for any new ideas/input. I will happily test anything (reasonable 
).
Here is the relevant part of VLCs debug output.
wasapi debug: reset
main debug: Buffering 74%
main debug: Buffering 76%
main debug: Buffering 77%
main debug: Buffering 78%
main debug: Buffering 80%
main debug: Buffering 81%
main debug: Buffering 82%
main debug: Buffering 84%
main debug: Buffering 85%
main debug: Buffering 86%
main debug: Buffering 88%
main debug: Buffering 89%
main debug: Buffering 90%
main debug: Buffering 92%
main debug: Buffering 93%
main debug: Buffering 94%
main debug: Buffering 96%
main debug: Buffering 97%
main debug: Buffering 98%
main debug: Stream buffering done (3000 ms in 30 ms)
main debug: end of video preroll
main debug: Received first picture
main debug: Decoder wait done in 120 ms
mmdevice debug: state changed: 1
mkv debug: found nothing, go up
main warning: playback way too early (-1589284): playing silence
main debug: inserting 76285 zeroes
main warning: picture is too late to be displayed (missing 702 ms)
main warning: picture is too late to be displayed (missing 1680 ms)
mkv debug: found nothing, go up
main warning: playback way too early (-1997680): playing silence
main debug: inserting 95888 zeroes
main warning: picture is too late to be displayed (missing 2022 ms)
main warning: picture is too late to be displayed (missing 2022 ms)
main warning: picture is too late to be displayed (missing 1942 ms)
mkv debug: found nothing, go up
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541437678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541469678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541501678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541533678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541565678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541597678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541629678 for FFmpeg
main debug: discarded audio buffer
main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 3000000)
main error: Could not convert timestamp 8541661678 for FFmpeg
