How to extract AVC track from MKV?

[gbates]

Hello

When I try to extract it with mkvextract.exe it says:
"Error: Extraction of track number 1 with the CodecID 'V_MPEG4/ISO/AVC' is not supported."

Maybe someone will know how to do that properly?

Best regards

[multicone]

It's not possible yet. Demuxing to raw h.264 is not a good option, and mkvextract can not create MP4 files.

[Haali]

You could use nero mp4 muxer i think.

[gbates]

Thanks for your answers.

It worked with a nero muxer, not perfect but still enough.

thanks

[pcjco04]

I also would like to demux the H.264 video from a MKV created by x264 CLI in order to create a MP4 instead.

I have no idea how to use the nero muxer. I assume I have to install Nero Recode (Trial) , but do I have to use the Nero GUI or is it possible to use this muxer in another way ?

[berrinam]

I presume Haali meant that you use the nero mp4 muxer directshow filter (through graphedit; you connect an mkv splitter to an mp4 muxer). Also, I just want to make sure that you are aware that you can create mp4 directly from x264 CLI

[pcjco04]

I use to output .MP4 files with x264 CLI but I was trying the .MKV output.

The problem is that I have problems with these output matroska files. Once remux through mkvmerge 1.5.0 (to add audio stream for example) they become unplayable with MPC (crash when seeked).
As I already delete the source and cannot recode, I was trying to get the MP4 from this MKV to see if mkvmerge could do better with it.

I tried the following graph with graphedit :

Haali Splitter (input .mkv) --> Nero AVC Muxer --> File Writer (output to .mp4)

But it stops saving the output after few megabytes. This short mp4 file is playable with MPC but unrecognized by mkvmerge.

Maybe the Nero AVC Muxer has problem with my h.264 stream
( --ref 5 --bframes 3 --b-pyramid --filter -1:-1 --bitrate %BITRATE% --pass 2 --stats "x264_stat.log" --qcomp 0.75 --ipratio 1.10 --pbratio 1.40 --analyse "all" --weightb --me "umh" --subme 6 --8x8dct )

[Ajaja2005]

Haali Splitter (input .mkv) --> Nero AVC Muxer --> File Writer (output to .mp4)
But it stops saving the output after few megabytes.
Did you deactivate "Synchronize streams" in Nero AVC Muxer properties?

[pcjco04]

Thanks, deactivate "Synchronize streams" allows to mux the whole file.