[MEncoder-users] Merging H.264/AAC movies [HELP]

[James Hastings-Trew]

Henk Schoneveld wrote:
> Sebi Onofrei wrote:
>   
>> Hello people,
>>
>> I tried but with no success yet to merge 2 H.264/AAC movies into one 
>> output, using this command:
>>
>> "mencoder -of lavf -lavfopts 
>> format=mp4:i_certify_that_my_video_stream_does_not_use_b_frames -oac 
>> copy -ovc copy first.mov second.mov -o merged.mov"
>>
>> The mencoder output after running the above configuration looks like 
>> this:
>> -----------
>> MEncoder 1.0rc1-4.1.2 (C) 2000-2006 MPlayer Team
>> CPU: Intel(R) Xeon(R) CPU           X3210  @ 2.13GHz (Family: 6, 
>> Model: 15, Stepping: 11)
>> CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>> Compiled with runtime CPU detection.
>> success: format: 0  data: 0x0 - 0xe3ed3
>> Quicktime/MOV file format detected.
>> VIDEO:  [avc1]  1024x768  24bpp  30.000 fps    0.0 kbps ( 0.0 kbyte/s)
>> [V] filefmt:7  fourcc:0x31637661  size:1024x768  fps:30.00  ftime:=0.0333
>> ** MUXER_LAVF 
>> *****************************************************************
>> You have certified that your video stream does not contain B frames.
>> REMEMBER: MEncoder's libavformat muxing is presently broken and will 
>> generate
>> INCORRECT files in the presence of B frames. Moreover, due to bugs 
>> MPlayer
>> will play these INCORRECT files as if nothing were wrong!
>> ******************************************************************************* 
>>
>> OK, exit
>> videocodec: framecopy (1024x768 24bpp fourcc=31637661)
>> Audio format 0x6134706d is incompatible with '-oac copy', please try 
>> '-oac pcm' instead or use '-fafmttag' to override it.
>>
>> Exiting...
>> -----------
>>
>> Then I tried to force a new tag with '-fafmttag 0xff', and there is a 
>> floating point exception:
>> ----------
>> videocodec: framecopy (1024x768 24bpp fourcc=31637661)
>> Forcing output audio format tag to 0xff.
>> audiocodec: framecopy (format=ff chans=2 rate=48000 bits=16 B/s=192000 
>> sample-0)
>> VIDEO CODEC ID: 28
>> AUDIO CODEC ID: 15003, TAG: 0
>> Writing header...
>> [mp4 @ 0x85a7c54]Warning, using MS style audio codec tag, the file may 
>> be unplayable!
>> [mp4 @ 0x85a7c54]track 1: sample duration is not set
>> Floating point exception
>> ----------
>>
>> Can anyone help or give me hints about how should I configure mencoder 
>> to merge H.264/AAC movies?
>> Or at least is it even possible to do so?
>>
>> Thank you.
>>
>> With kind regards,
>> Sebi Onofrei
>> _______________________________________________
>> MEncoder-users mailing list
>> MEncoder-users at mplayerhq.hu
>> https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>>     
>
> Have a look at http://gpac.sourceforge.net/doc_mp4box.php
> MP4Box -add file1.mov#video -cat file2.mov#video -add file1.mov#audio
> -cat file2.mov#audio newfile.mp4 will probrably do what  you want
>
> If you get sync issues, you can resolve this with MP4Box -delay 1=200
> newfile.mp4 if in this case audio would be 200ms behind video
>
> Henk Schoneveld
>   
One problem with MP4Box's delay parameter is that not all mp4 players 
honor the delay tag, Quicktime included.