[MEncoder-users] Help with mencoder

Jonathan Busby jonathanbusby at gmail.com
Mon Mar 7 01:11:55 CET 2011 

What was the specific error?

Jonathan

On Sun, Mar 6, 2011 at 3:16 PM, JD <jd1008 at gmail.com> wrote:

> 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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