[MEncoder-users] How to join avi files with x264 streams?

[Grozdan]

On Sat, May 8, 2010 at 11:48 AM, Josef Wolf <jw at raven.inka.de> wrote:
> On Fri, May 07, 2010 at 10:29:31AM -0500, Laine Lee wrote:
>> On 5/7/10 1:00 AM, "Josef Wolf" <jw at raven.inka.de> wrote:
>> > I have captured my old VHS recordings with mencoder and created x264 avi's
>> > using two-pass with those options:
>> >
>> >   -ovc x264 -x264encopts
>> > bitrate=800:pass=2:subq=7:frameref=15:subq=6:frameref=15:me=umh:partitions=all
>> > :8x8dct:direct_pred=auto:me_range=64:trellis=2:bframes=5:b_pyramid:weight_b:th
>> > reads=auto:nr=1000
>> >
>> > In the next step, I want to join some of those files. I tried:
>> >
>> >   mencoder -ovc copy -oac copy -o outfile.avi file1.avi file2.avi
>> >
>> > But the resulting file has some strange artefacts in the first ten seconds
>> > after the join position (that is, in the first ten seconds of file2.avi)
>> > which are _not_ present in the original file2.avi.
>> >
>> > Why does "-ovc copy" do any manipulations on the stream?
>> >
>> > Any ideas?
>>
>> Can you use "MP4Box -cat"?
>>
>> http://gpac.sourceforge.net/doc_mp4box.php
>
> jw at ubuntu:MP4Box -cat 01.avi -cat 02.avi t.avi
> H264/AVC Video format not supported in AVI - please extract to raw format
> first
> Error appending 01.avi: Feature Not Supported
>
> Do I have to re-encode into another format first? But then I would loose
> quality?

No, you have to do exactly as it says above. Extract the video from
the avi container. Done like this

MP4Box -aviraw video yourfile.avi

Do this for each file you have

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