[gst-devel] Convert .mkv containers into .mp4 containers playable on a PS3 using gst-launch

Sat Dec 8 11:30:31 CET 2007

It is possible (though somewhat exotic) for the muxer to become "stuck" if the
incoming streams do not have proper (= nicely sequential and balanced)
timestamps.  You could try to verify this by inserting an identity element
(after each queue) and see what it reports.
This would also tell how far (#buffers) the pipeline really got).

Also, matroskademux is not quite forthcoming in its error reporting.
If it runs into some error, it will pause its task without sending any
message/notification (unlike avimux in this regard)
[it does send an EOS which normally should clear downstream blocking and finish
things, but you never know ...]

Regards,
Mark.

Andreas Tunek wrote:
> Is there really no way to transcode a .mkv to a .mp4 using gst-launch?
> 
> 2007/12/3, Andreas Tunek <andreas.tunek at gmail.com>:
>> Using
>>
>> gst-launch -v filesrc location=heroes.s02e07.720p.hdtv.x264-nbs.mkv !
>> matroskademux name=d  ffmux_mp4 name=m ! filesink
>> location=heroes.s2.7.mp4 d.video_00 ! queue ! m.video_00 d.audio_00 !
>> queue ! m.audio_00
>>
>> it stops here:
>> Ställer in rörledningen till PAUSED...
>> Rörledningen utför PREROLL...
>> /pipeline0/queue0.sink: caps = video/x-h264,
>> codec_data=(buffer)01640033ffe1001867640033ac721c05005ba100000303e90000bb808f18319e01000468eebcb0,
>> width=(int)1280, height=(int)720, pixel-aspect-ratio=(fraction)1/1,
>> framerate=(fraction)1710843747/71356439
>> /pipeline0/queue0.src: caps = video/x-h264,
>> codec_data=(buffer)01640033ffe1001867640033ac721c05005ba100000303e90000bb808f18319e01000468eebcb0,
>> width=(int)1280, height=(int)720, pixel-aspect-ratio=(fraction)1/1,
>> framerate=(fraction)1710843747/71356439
>> /pipeline0/m.video_0: caps = video/x-h264,
>> codec_data=(buffer)01640033ffe1001867640033ac721c05005ba100000303e90000bb808f18319e01000468eebcb0,
>> width=(int)1280, height=(int)720, pixel-aspect-ratio=(fraction)1/1,
>> framerate=(fraction)1710843747/71356439
>>
>> Any help?
>>
>> 2007/12/1, Andreas Tunek <andreas.tunek at gmail.com>:
>>> Thanks for your help. Unfortunately I still have problems.....
>>>
>>> 2007/11/28, Edward Hervey <bilboed at gmail.com>:
>>>> On Wed, 2007-11-28 at 19:17 +0100, Andreas Tunek wrote:
>>>>> Hi Gstreamers
>>>>   We Stream the G !
>>>>
>>>>> I am sorry if this is the wrong list for this question, if so, please
>>>>> direct me to the correct list.
>>>>>
>>>>> I have a PS3 sitting next to my beautiful plasma TV. I use the PS3
>>>>> browser to download mpeg2 movies from my own server at home and view
>>>>> them using the PS3, but unfortunately most media I want to watch is
>>>>> not in mpeg2 format.
>>>>>
>>>>> The PS3 is supposed to be able to play h264 video and aac audio and is
>>>>> also supposed to be able to use the .mp4 container.
>>>>>
>>>>> Most of the media I would want to watch are .mkv files with h264
>>>>> encoded video and aac audio and I was wondering if anyone has any luck
>>>>> to remux the .mkv to a .mp4 using gst-launch? When I asked this on
>>>>> #gstreamer on freenode some helpful person (sorry, I forgot your
>>>>> name...) gave me this pipeline:
>>>>>
>>>>>  gst-launch filesrc location=heroes.s02e07.720p.hdtv.x264-nbs.mkv !
>>>>> matroskademux name=d  ffmux_mp4 name=m ! filesink
>>>>> location=heroes.s2.7.mp4 m.video00 ! queue ! video00 audio00 ! queue !
>>>>> d.audio00
>>>> Put your various parts one after the other and you'll see your (syntax)
>>>> error :
>>>>
>>>> filesrc ! matroskademux name=d
>>>> ffmux_mp4 name=m ! filesink
>>>>
>>>> Now you want to connect the two together.
>>>>  matroskademux has pads with names 'video_%02d' or 'audio_%02d', that
>>>> means that the first audio and video pad will be video_00 and audio_00.
>>>>  Using the same logic for ffmux_mp4, we have video_00 and audio_00
>>>>
>>>>  Which gives us :
>>>>
>>>> d.video_00 ! queue ! m.video_00
>>>> d.audio_00 ! queue ! m.audio_00
>>>>
>>>>
>>>>   I'll let you figure out where your errors were and reconstruct the
>>>> whole pipeline.
>>>>
>>> I made the following pipeline:
>>> gst-launch filesrc location=heroes.s02e07.720p.hdtv.x264-nbs.mkv !
>>> matroskademux name=d  ffmux_mp4 name=m ! filesink
>>> location=heroes.s2.7.mp4 d.video_00 ! queue ! m.video_00 d.audio_00 !
>>> queue ! m.audio_00
>>>
>>> I get a lot of warnings like
>>>
>>> ** (gst-launch-0.10:2695): WARNING **: Add decoder imc (86046) please
>>>
>>> ** (gst-launch-0.10:2695): WARNING **: Add decoder libgsm (86037) please
>>>
>>> ** (gst-launch-0.10:2695): WARNING **: Add decoder libgsm_ms (86049) please
>>>
>>> but then I get
>>>
>>> Ställer in rörledningen till PAUSED...
>>> Rörledningen utför PREROLL... (pipeline is doing Preroll)
>>>
>>> And this is all that is happening. The output file is 0 byte.
>>>
>>> Is there an error in my pipeline or is there another problem?
>>>
>>> I tried this on F8 wit Livna packages.
>>>
>>> Regards
>>> tuna
>>>
>>>>> However, when I run the above pipeline it complains that there is no
>>>>> video00-element.
>>>>>
>>>>> I am running Fedora 7 with freshrpms, but I can try it on F8 with Livna as well.
>>>>>
>>>>> Have anyone successfully remuxed files and played them on a PS3 using
>>>>> gst-launch? If so, could you please post the gst-launch pipeline you
>>>>> are using?
>>>>>
>>>>> Are there any other tools I should use, maybe there is something
>>>>> convenient I have missed?
>>>>>
>>>>> Best regards
>>>>>
>>>>> tuna
>>>>    Edward
>>>>
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