[FFmpeg-user] MKV To MP4

Mathieu Malaterre mathieu.malaterre at gmail.com
Thu Dec 3 11:01:17 EET 2020


On Thu, Dec 3, 2020 at 9:51 AM John Henderson via ffmpeg-user
<ffmpeg-user at ffmpeg.org> wrote:
> Hi there,
> I am not sure whether this is a windows media player issue or FFMPEG. I am
> using ffmpeg to capture the screen and record audio, whilst playing games.
> It does a great job and I save the file as an mkv. I can convert the file
> to mp4 and all seems fine. However when I try to play the file  with
> windows media player version 12.019 etc. I get "network is too busy to play
> file at original quality" and it just sits there doing nothing. If i open
> windows media player classic, it plays the mp4 file perfectly with no
> problems at all. This is the ffmpeg command I used to convert the mkv file
> to mp4
> ffmpeg -i laptop.mkv -c copy laptop.mp4

I would at least give it another try using:

-movflags +faststart

* https://trac.ffmpeg.org/wiki/Encode/H.264#AdditionalInformationTips
=> faststart for web video

> Is it possible that it may be the command I used to create the MKV file
> shown below.
> "/k ffmpeg.exe -y -probesize 10M -rtbufsize 1500M -f dshow -i audio=""" &
> Audio_name & """ -acodec pcm_s16le -f gdigrab -framerate 60 -i desktop
> -vcodec libx264 -qp 0 -threads 0 -crf 18 -preset ultrafast -tune
> zerolatency " myFile.mkv"
> Or is it windows media player 12.0 ??
> Any help with this will be really appreciated. Thanks
> All the best,
> John
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