Re: Pyglet 1.2 Avbin 10 - video play from MKV - black screen

[Nathan]

You should begin by downloading the pyglet source code and looking at examples/media_player.py

media_player.py isn't perfect, but it usually works pretty well.  If it gives you a black screen as well, maybe you could make a small sample .mkv file that you could share so I could try to debug the issue.

~ Nathan

On Wed, Mar 13, 2013 at 3:45 PM, Tomas <top...@gmail.com> wrote:

I use simple as possible code to create a video player:

source = pyglet.media.load("some_file.mkv")

format = source.video_format

if not format:

    print 'No video track in this source.'

    sys.exit(1)

player = pyglet.media.Player()

player.queue(source)

player.play()

window = pyglet.window.Window(width=format.width, height=format.height)

@window.event

def on_draw():

    #window.clear()

    player.get_texture().blit(0, 0)

pyglet.app.run()

Screen size is adjusted according to video, but texture is empty (or black?) With AVI there is no such problem and everything works fine. MKV contains video which is encoded with h264

on_draw() event is handled to. No other warnings or any kind of messages.

Any thoughts where to begin?

Thanks,  T.

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[Tomas]

I've tried with 5 or 6 mkv files (different a/v codecs). Result is the same.

FFplay, VLC, mplayer plays those file flawless.

[Nathan]

Can you give me access to a small mkv file that I could test with?

~ Nathan

[Tomas]

Any file from torrent. I don't have any small files - smallest about 4gb.

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[Nathan]

Quick status update: I have uncovered some pretty fundamental flaws in the original design of the AVbin API have affected the decoding of ANY codec that is more complicated than basic in-order frame encoding.

I've been working for a few weeks on the issue, and have ended up rewriting a lot of the AVbin API and Pyglet module that's using it.  I'm getting somewhat close to completion (I hope).  I'll be starting some new threads on this mailing list as I get a little closer to completion.

~ Nathan

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