[MEncoder-users] Help with mencoder

Sun Mar 6 22:16:15 CET 2011

I DID indeed try that one as well.
Mencoder complained about my using -oac copy
and it suggested I use -oac pcm. SO I did do that
and the avi file was created. But when I
played the resulting avi file, it only played the very
first video of 12 videos, and it exited; as if that
was the end of the file. The size of the resulting
avi file was well over a gigabyte.

Cheers,

JD

On 03/06/2011 03:54 PM, Jonathan Busby wrote:
> 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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