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<blockquote data-quote="Lehmden" data-source="post: 1193485" data-attributes="member: 109222">Hi.Yes, but .ts files can be (at least HD recordings are) Mpeg4 files too. Can you try to mux one of your not playing mp4 files into Matroska container? It's easy to do with MKVToolnix and it's fast. So you can see if the issue is related to the codec or to the container (mp4, mkv,&nbsp; ts are container that don't say anything about the used codecs at all). If the mkv file will play and the mp4 file won't, it's an issue of the default splitter in your directshow system on &quot;Lennie&quot;. If the mkv also don't play it's a codec issue. In general it is wise to have as few codecs installed as possible. The Microsoft Codec is part of the OS and can not be removed (easily). LAVF is the most advanced codec today and can play nearly everything. That's why it is bundled with MP (1 and 2). Some time ago I have done some testing with mainconcept codecs too and they are not as good as LAVF but they are working. If you can not get rid of mainconcept codec because other apps needed them you may try to uninstall the LAVF codec (control panel - software) and see if the client then can play your mp4 videos with mainconcept.</blockquote>

[QUOTE="Lehmden, post: 1193485, member: 109222"] Hi. Yes, but .ts files can be (at least HD recordings are) Mpeg4 files too. Can you try to mux one of your not playing mp4 files into Matroska container? It's easy to do with MKVToolnix and it's fast. So you can see if the issue is related to the codec or to the container (mp4, mkv, ts are container that don't say anything about the used codecs at all). If the mkv file will play and the mp4 file won't, it's an issue of the default splitter in your directshow system on "Lennie". If the mkv also don't play it's a codec issue. In general it is wise to have as few codecs installed as possible. The Microsoft Codec is part of the OS and can not be removed (easily). LAVF is the most advanced codec today and can play nearly everything. That's why it is bundled with MP (1 and 2). Some time ago I have done some testing with mainconcept codecs too and they are not as good as LAVF but they are working. If you can not get rid of mainconcept codec because other apps needed them you may try to uninstall the LAVF codec (control panel - software) and see if the client then can play your mp4 videos with mainconcept. [/QUOTE]

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