[MEncoder-users] Help with mencoder

Mon Mar 7 00:54:30 CET 2011

In that case you can just do a re-mux :

mencoder Zachar*.flv -ovc copy  -oac copy -o Zach_all.avi

Jonathan

On Sun, Mar 6, 2011 at 2:57 PM, JD <jd1008 at gmail.com> wrote:

> Thank you Jonathan.
> They are indeed all of the same resolution and scale and same frame rate,
> even same audio frequency and rate.
>
> Cheers,
>
> JD
>
>
>
> On 03/06/2011 02:37 PM, Jonathan Busby wrote:
>
>> Also, you'd have to use the -vf expand filter in conjunction with the
>> scale
>> filter to get a fixed resolution.
>>
>> Jonathan
>>
>> On Sun, Mar 6, 2011 at 4:15 PM, Jonathan Busby<jonathanbusby at gmail.com
>> >wrote:
>>
>>  I forgot to mention that they all have to have the same resolution;
>>> otherwise you're going to have to use the -vf scale filter on them
>>> individually and then do a stream copy assuming you've fixed the
>>> framerate
>>> of all the sub-videos.
>>>
>>> Jonathan
>>>
>>>
>>> On Sun, Mar 6, 2011 at 4:11 PM, Jonathan Busby<jonathanbusby at gmail.com
>>> >wrote:
>>>
>>>  You can't use the text based "cat" command to combine structured binary
>>>> video files -- it just doesn't work that way.
>>>> You have to re-encode (transcode) your source videos into a new video.
>>>>
>>>> Here is an example that would work for you :
>>>>
>>>> mencoder Zachar*.flv -ovc x264 -x264encopts crf=18 -oac mp3lame
>>>> -lameopts
>>>> preset=insane -o Zach_all.avi
>>>>
>>>>
>>>> Jonathan
>>>>
>>>>
>>>>
>>>>
>>>> On Sat, Mar 5, 2011 at 3:09 PM, JD<jd1008 at gmail.com>  wrote:
>>>>
>>>>  Hi,
>>>>> I wanted to combine 12 flash video files (from youtube)
>>>>> into a single avi file.
>>>>> So I did
>>>>>
>>>>> cat at Zachar*.flv>  Zach_all.flv
>>>>>
>>>>> $ mencoder Zach_all.flv -o Zach_all.avi -forceidx -ovc copy -oac pcm
>>>>>
>>>>> The output shows skipping frames, and
>>>>> missing aspect information, as you see below.
>>>>>
>>>>> What do I need to do to fix that, so thet when I am transcoding into
>>>>> .avi,
>>>>> I do not get these skips and missing aspect info?
>>>>>
>>>>>
>>>>>
>>>>> MEncoder SVN-r31628-4.4.5 (C) 2000-2010 MPlayer Team
>>>>> success: format: 0  data: 0x0 - 0x8378f0a
>>>>> libavformat file format detected.
>>>>> [flv @ 0x92d07a0] Estimating duration from bitrate, this may be
>>>>> inaccurate
>>>>> [lavf] stream 0: video (h264), -vid 0
>>>>> [lavf] stream 1: audio (aac), -aid 0
>>>>> VIDEO:  [H264]  480x270  0bpp  29.917 fps  119.2 kbps (14.5 kbyte/s)
>>>>> [V] filefmt:44  fourcc:0x34363248  size:480x270  fps:29.917
>>>>>  ftime:=0.0334
>>>>>
>>>>>
>>>>> ==========================================================================
>>>>> Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
>>>>> AUDIO: 44100 Hz, 2 ch, s16le, 49.5 kbit/3.51% (ratio: 6184->176400)
>>>>> Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
>>>>>
>>>>>
>>>>> ==========================================================================
>>>>> videocodec: framecopy (480x270 0bpp fourcc=34363248)
>>>>> Writing header...
>>>>> ODML: Aspect information not (yet?) available or unspecified, not
>>>>> writing
>>>>> vprp header.
>>>>> Writing header...
>>>>> ODML: Aspect information not (yet?) available or unspecified, not
>>>>> writing
>>>>> vprp header.
>>>>> Pos:   0.7s     21f ( 0%) 14.38fps Trem:   0min   0mb  A-V:0.067
>>>>> [0:1411]
>>>>> Skipping frame!
>>>>> Pos:   1.1s     33f ( 0%) 18.45fps Trem:   0min   0mb  A-V:0.068
>>>>> [150:1411]
>>>>> Skipping frame!
>>>>> Pos:   6.0s    182f ( 0%) 38.81fps Trem:  65min 1014mb  A-V:0.067
>>>>> [148:1411]
>>>>> Skipping frame!
>>>>> Pos:  23.5s    706f ( 0%) 43.90fps Trem:  70min 1142mb  A-V:0.067
>>>>> [106:1411]
>>>>> Skipping frame!
>>>>> Pos:  38.4s   1153f ( 0%) 44.83fps Trem:  68min 1147mb  A-V:0.067
>>>>> [113:1411]
>>>>> Skipping frame!
>>>>> Pos:  57.4s   1723f ( 0%) 44.84fps Trem:  66min 1117mb  A-V:0.068
>>>>> [124:1411]
>>>>> Skipping frame!
>>>>> Pos:  76.9s   2306f ( 1%) 44.36fps Trem:  65min 1089mb  A-V:0.067
>>>>> [128:1411]
>>>>> Skipping frame!
>>>>> Pos:  98.4s   2950f ( 1%) 44.17fps Trem:  65min 1092mb  A-V:0.067
>>>>> [126:1411]
>>>>> Skipping frame!
>>>>> Pos: 117.5s   3522f ( 1%) 43.68fps Trem:  65min 1086mb  A-V:0.067
>>>>> [128:1411]
>>>>> Skipping frame!
>>>>> Pos: 132.5s   3972f ( 2%) 43.76fps Trem:  66min 1092mb  A-V:0.067
>>>>> [127:1411]
>>>>> Skipping frame!
>>>>> Pos: 153.7s   4608f ( 2%) 44.14fps Trem:  66min 1104mb  A-V:0.067
>>>>> [126:1411]
>>>>> Skipping frame!
>>>>> Pos: 173.1s   5190f ( 2%) 43.84fps Trem:  68min 1133mb  A-V:0.067
>>>>> [120:1411]
>>>>> Skipping frame!
>>>>> Pos: 190.3s   5705f ( 3%) 44.08fps Trem:  67min 1122mb  A-V:0.067
>>>>> [121:1411]
>>>>> Skipping frame!
>>>>> Pos: 211.7s   6347f ( 3%) 43.80fps Trem:  66min 1114mb  A-V:0.068
>>>>> [124:1411]
>>>>> Skipping frame!
>>>>> Pos: 228.7s   6856f ( 3%) 43.84fps Trem:  66min 1113mb  A-V:0.067
>>>>> [124:1411]
>>>>> Skipping frame!
>>>>> Pos: 248.1s   7436f ( 4%) 44.06fps Trem:  65min 1110mb  A-V:0.067
>>>>> [125:1411]
>>>>> Skipping frame!
>>>>> Pos: 265.3s   7954f ( 4%) 43.82fps Trem:  66min 1120mb  A-V:0.067
>>>>> [123:1411]
>>>>> Skipping frame!
>>>>>
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>>>>>
>>>>>
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