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Zkusil jsem video soubory vytvořené mým "proslaveným (zde) programem VIDEO > MPEG-4. Dopadlo to neslavně. Že jsou mp4 z Mencoderu nekorektní jsem tušil. Ale problém je i s videokodekem H264 a zvukem AAC vytvořeným Mencoderem. Vlastně jediným korektním souborem je AVI/XVID/MP3 (viz výpisy).

MP4 s videokodekem XVID a zvukem mp3

mircy@linux:~/Documents> mkvmerge mp4-x* -o o.mkv
mkvmerge v1.6.5 ('Watcher Of The Skies') built on May  3 2006 02:21:36
'mp4-xvid-mp3.mp4': Using the Quicktime/MP4 demultiplexer.
Warning: Quicktime/MP4 reader: MPEG4 track 1 is missing the esds atom/the decoder config. Skipping this track.
Warning: Quicktime/MP4 reader: Unknown/unsupported FourCC '.mp3' for track 2.
Warning: 'mp4-xvid-mp3.mp4': No tracks will be copied from this file. This usually indicates a mistake in the command line.

Error: No streams to output were found. Aborting.
mircy@linux:~/Documents

MP4 s videokodekem h264 a zvukem aac

mircy@linux:~/Documents> mkvmerge mp4-h* -o o.mkv
mkvmerge v1.6.5 ('Watcher Of The Skies') built on May  3 2006 02:21:36
'mp4-h264-aac.mp4': Using the Quicktime/MP4 demultiplexer.
Warning: Quicktime/MP4 reader: MPEG4 part 10/AVC track 1 is missing its decoder config. Skipping this track.
Warning: Quicktime/MP4 reader: The AAC track 2 is missing the esds atom/the decoder config. Skipping this track.
Warning: 'mp4-h264-aac.mp4': No tracks will be copied from this file. This usually indicates a mistake in the command line.

Error: No streams to output were found. Aborting.
mircy@linux:~/Documents

AVI s videokodekem h264 a zvukem aac

mircy@linux:~/Documents> mkvmerge avi-h* -o o.mkv
mkvmerge v1.6.5 ('Watcher Of The Skies') built on May  3 2006 02:21:36
'avi-h264-aac.avi': Using the AVI demultiplexer. Opening file. This may take some time depending on the file's size.

Error: 'avi-h264-aac.avi' track 0: You are trying to put AVC/h.264 video from an AVI or a similar VfW (Video for Windows) compatible source into a Matroska file in the so-called 'VfW compatibility mode'. Please note that this is not the official way to store AVC/h.264 video in Matroska. Therefore proper playback of such files cannot be guaranteed, and we strongly urge you to use the native Matroska-mode.
At the moment mkvmerge does not support converting from VfW-mode AVC/h.264 tracks to native Matroska-mode AVC/h.264 tracks. You can, however, first import the video track into a MP4 file with e.g. 'MP4Box' (use Google). Then you can use mkvmerge and put the video into a Matroska file.
If you're trying to get AVC/h.264 from an AVI into Matroska then the commands you need to use are:
 avi2raw avc.avi raw.264
 mp4box -fps 23.976 -add raw.264 avc.mp4

If you really know what you are doing then you can force mkvmerge to put this AVC/h.264 track into a Matroska file even in VfW mode if you add '--engage allow_avc_in_vfw_mode' to the command line. You can do that in mmg with the 'Add command line options' menu entry in the 'Muxing' menu.
mircy@linux:~/Documents

AVI s videokodekem xvid a zvukem aac

mircy@linux:~/Documents> mkvmerge avi-x*aac* -o o.mkv
mkvmerge v1.6.5 ('Watcher Of The Skies') built on May  3 2006 02:21:36
'avi-xvid-aac.avi': Using the AVI demultiplexer. Opening file. This may take some time depending on the file's size.
'avi-xvid-aac.avi' track 0: Using the MPEG-4 part 2 video output module.

Error: 'avi-xvid-aac.avi' track 1: Unknown/unsupported audio format 0x706d for this audio track.
mircy@linux:~/Documents

AVI s videokodekem xvid a zvukem mp3

mircy@linux:~/Documents> mkvmerge avi-x*mp3* -o o.mkv
mkvmerge v1.6.5 ('Watcher Of The Skies') built on May  3 2006 02:21:36
'avi-xvid-mp3.avi': Using the AVI demultiplexer. Opening file. This may take some time depending on the file's size.
'avi-xvid-mp3.avi' track 0: Using the MPEG-4 part 2 video output module.
'avi-xvid-mp3.avi' track 1: Using the MPEG audio output module.
The file 'o.mkv' has been opened for writing.
progress: 100%
The cue entries (the index) are being written...
Muxing took 1 second.
mircy@linux:~/Documents

Otázka 1. Je možno vytvořit AVI s H264 a ACC zvukem, a ten pak přemuxovat do MKV?

Otázka 2. Zvuk vytvořený Mencoderem pomocí Faac je co? Podle Mkvmerge je to Unknown.

Otázka 3. Jak vyrobit korektní MKV s H264/AAC v Linuxu - jde to - jak to děláte - Váš příkaz. Mp4 vytvořené Windows programy se v Mkvmerge převádí korektně.

Otázka 4. Děláte MPEG-4 s H264 - zkušenosti, postup.

Nevím, zda jsou ty problémy ve mně, nebo v Mencoderu. Nechtěl by mi někdo pomoci jako spoluautor?