*
----------------------------
Thanks & Regards
Mohit Dhingra
+919611190435*
On 15 April 2012 20:08, eolin...@gmail.com <eolin...@gmail.com> wrote:
> >>>Thanks for your reply :-) I didn't know that the mailing list is not
> that active.
>
> This project misses of a leader since the actual leader have left the
> project for personal reason and found nobody to replace him. It is damage
> because this project is great and powerful. The roadmap is rich and the
> 1.2.0 alpha1 is very interesting and promising. However, this project have
> a lack of a good and a modern documentation with a lot of practice samples.
> So the command line could be awful with so much options and lost the user
> and the software engineer. Even the new of the output of the last version
> (1.17) is not updated on the blog/official website.And I don't speak how to
> have the last version on the official website :-( A lot of things should be
> done before to restart on good news bases. The fact that 's an open source
> project do that he could live again easily with a motivated team. I am
> quiet sure that it could restart quickly. Nothing is lost. Crossed fingers.
>
>
Oh, I see.
Also, Can I help out in some way? I have some hands on on OS stuff, but I
am not a part of the open source project.
> >>< -R n[,f1[,f2]]
> 0 Constant bitrate (CBR) encoding. [default]
>
> Ahah. You have yourself the answer at your question. You don't need to
> precise CBR because this value is by default. It is only useful when you
> are using two pass by sample.
>
>
> >>>"-o test" indicates the output file name, right? That I have already
> included. I don't care about the output file format, it could be any format
> which the other computer (client) can play, and no worries about the
> quality as well.
>
> Okay. Here how I see things :
>
> In one pass for sample using ffmpeg, (you could use xvid too for the same
> result) :
>
> transcode -i Blood_Diamond.avi -o Blood_Diamond_Mod.avi -y ffmpeg, ffmpeg
> -F mpeg4 -w 5000 -N0X55 -E 44100,16,2
>
> I explain :
>
> -i Blood_Diamond.avi # the input file
> -o Blood_Diamond_Mod.avi # the output file
> -y ffmpeg, ffmpeg # utilisation of ffmpeg for video and for audio (I am
> not sure that the second is needed obligatory)
> -F mpeg4 # utilisation of codec mpeg4 of ffmpeg=> divx or xvid ?
> -w 5000 # specification of a bitrate of 5000
> -NOX55 # specification of output audio in MP3
> -E 44100,16,2 # samplerate at 44100, 16 bits, 2 channels (stereo). If
> you'd like the same change by -E 0,0,2 or 0,0,1 (for mono)
>
>
> In two pass and you 'll understand better how to use the R options (to my
> humble advice, I' m just an user) :
>
> transcode -i Blood_Diamond.avi -o /dev/null -y ffmpeg,null -F mpeg4 -w
> 5000 -R 1
>
> transcode -i Blood_Diamond -o Blood_Diamond_Mod.avi -y ffmpeg,ffmpeg -F
> mpeg4 -w 5000 -N0X55 -E 44100,16,2 -R 2
>
> Here you have moreover :
>
> -R 1 # first pass
> -R 2 # second pass
> -o /dev/null # for the first pass a tempory output
>
> Note : we don't matter about audio in the first pass so it why we don't
> specify a audio codec in -y ffmpeg,null
>
> If you have some errors running this command (the first or the both),
> could you please put the output of the terminal. Thanks.
> Hopes this helps you.
>
>
It ran, but I still don't have a constant bit rate stream.
Here is what I did,
1.
transcode -i Blood_Diamond.avi -o /dev/null -y ffmpeg,null -F mpeg4 -w 5000
-R 1 -N 0x55
2.
transcode -i Blood_Diamond.avi -o Blood_Diamond_Mod.avi -y ffmpeg,ffmpeg -F
mpeg4 -w 5000 -E 44100,16,2 -R 2 -N 0x55
Now, streaming the output video.
vlc -vvv Blood_Diamond_Mod.avi --sout
'#rtp{dst=10.112.19.153,port=1234,sdp=rtsp://10.112.10.53:8080/test.sdp}'
But with bwm-ng tool, when I am monitoring the bandwidth, it comes out be
variable.
Same thing with
transcode -i Blood_Diamond.avi -o Blood_Diamond_Mod.avi -y ffmpeg, ffmpeg
-F mpeg4 -w 5000 -N 0x55 -E 44100,16,2
I do have the option to transcode from vlc as well, there I get a constant
bit rate stream also, but it's not able to transcode it at more than 20
Mbps.
> 2012/4/15 Mohit Dhingra <mohitdhing...@gmail.com>
>
>> Thanks for your reply :-) I didn't know that the mailing list is not that
>> active.
>>
>> About Input file:
>>
>>
>> ---------------------------------------------------------------------------------------------------------------------------
>> cadlab:/srv/streaming # tcprobe -i Blood_Diamond.avi
>> [tcprobe] RIFF data, AVI video
>> [tcprobe] summary for Blood_Diamond.avi, (*) = not default, 0 = not
>> detected
>> import frame size: -g 720x416 [720x576] (*)
>> frame rate: -f 25.000 [25.000] frc=3
>> audio track: -a 0 [0] -e 48000,0,2 [48000,16,2] -n 0x55 [0x2000]
>> (*)
>> bitrate=122
>> kbps
>>
>> length: 206153 frames, frame_time=40 msec,
>> duration=2:17:26.119
>>
>> -------------------------------------------------------------------------------------------------------------------------
>>
>> So, As I told you, I want lots of constant bit rate streams (starting
>> from 1 Mbps to 100 Mbps, 5000 was just an example to test, but it doesn't
>> seem to produce constant bit rate, that's why I posted. )
>>
>> I used "-R 0" because man page says
>>
>> -R n[,f1[,f2]]
>> 0 Constant bitrate (CBR) encoding. [default]
>> The codec tries to achieve constant bitrate output. This
>> means, each encoded frame is mostly the same size. This type of encoding
>> can help in maintaining constant filling of hardware buffer on set top
>> players or smooth streaming over networks. By the way, Constant bitrate is
>> often obtained sacrifying quality during high motion scenes.
>>
>> "-o test" indicates the output file name, right? That I have already
>> included.
>>
>> So, basically I want to upscale the video (by padding bits or stuff like
>> that) and I want to stream over the network. I don't care about the output
>> file format, it could be any format which the other computer (client) can
>> play, and no worries about the quality as well. If there is something I am
>> misinterpreting, please let me know, I would like to clarify as well.
>>
>>
>> *
>> ----------------------------
>> Thanks & Regards
>> Mohit Dhingra
>> *
>>
>>
>> On 15 April 2012 01:32, eolin...@gmail.com <eolin...@gmail.com> wrote:
>>
>>> And you don't speak about audio ? Did you have one and in which format
>>> will be in the output file ?
>>>
>>> 2012/4/14 eolin...@gmail.com <eolin...@gmail.com>
>>>
>>> Hi Mohit,
>>>>
>>>> Be patient this mailing list is not very active . :-(
>>>>
>>>> Could you give us more explanations on your input file ?
>>>> tcprobe -i Blood_Diamond.avi
>>>>
>>>> I don't know if it is a translation error of my part but I don't
>>>> understand what do you like to obtain. what/where is your output file and
>>>> his format ? Why do you use a bitrate of 5000 if you want to have a 100
>>>> mbps ? Why do you use the option R 0 ? one pass or more ?
>>>>
>>>
>>> Regards.
>>>>
>>>> @+
>>>>
>>>>
>>>> 2012/4/14 Mohit Dhingra <mohitdhing...@gmail.com>
>>>>
>>>>> This is for the experimental purpose, I am not worried about the video
>>>>> quality. I just want to convert the video to 100 Mbps, so that I can
>>>>> stream
>>>>> it and test the system performance. Any inputs please..
>>>>>
>>>>> *
>>>>> ----------------------------
>>>>> Thanks & Regards
>>>>> Mohit Dhingra
>>>>> *
>>>>>
>>>>>
>>>>> On 13 April 2012 23:33, Mohit Dhingra <mohitdhing...@gmail.com> wrote:
>>>>>
>>>>>> *Hello All,*
>>>>>>
>>>>>> I need to generate constant bit rate stream, starting from 1 Mbps to
>>>>>> 100 Mbps bit rate. I tried using transcode for the same:
>>>>>>
>>>>>> transcode -i Blood_Diamond.avi -w 5000,15 -o test -y ffmpeg -F mpeg4
>>>>>> -R 0
>>>>>>
>>>>>> But, it doesn't generate constant bit rate stream. What are the
>>>>>> options that I am missing? Thanks in advance!
>>>>>>
>>>>>> *
>>>>>> ----------------------------
>>>>>> Thanks & Regards
>>>>>> Mohit Dhingra
>>>>>> *
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Olivier
>>>> Cenwen un elfe sur la banquise/ an elve on the ice
>>>> Mon blog perso sur le multimédia, Ubuntu, Linux et OpenShot :
>>>> http://linuxevolution.wordpress.com/
>>>> Le forum d'Openshot où vous me trouverez : http://openshotusers.com/
>>>> http://openshotusers.com/forum/index.php
>>>> Nothing is lost until the last second.
>>>> The family motto : When we want, we can.
>>>> Astuces, Actualités, Logiciels, bref sur tout ce que je ne fais
>>>> d'articles dessus
>>>> Google+<https://plus.google.com/u/0/111472725110173916234/posts>
>>>>
>>>>
>>>
>>>
>>> --
>>> Olivier
>>> Cenwen un elfe sur la banquise/ an elve on the ice
>>> Mon blog perso sur le multimédia, Ubuntu, Linux et OpenShot :
>>> http://linuxevolution.wordpress.com/
>>> Le forum d'Openshot où vous me trouverez : http://openshotusers.com/
>>> http://openshotusers.com/forum/index.php
>>> Nothing is lost until the last second.
>>> The family motto : When we want, we can.
>>> Astuces, Actualités, Logiciels, bref sur tout ce que je ne fais
>>> d'articles dessus
>>> Google+<https://plus.google.com/u/0/111472725110173916234/posts>
>>>
>>>
>>
>
>
> --
> Olivier
> Cenwen un elfe sur la banquise/ an elve on the ice
> Mon blog perso sur le multimédia, Ubuntu, Linux et OpenShot :
> http://linuxevolution.wordpress.com/
> Le forum d'Openshot où vous me trouverez : http://openshotusers.com/
> http://openshotusers.com/forum/index.php
> Nothing is lost until the last second.
> The family motto : When we want, we can.
> Astuces, Actualités, Logiciels, bref sur tout ce que je ne fais d'articles
> dessus Google+ <https://plus.google.com/u/0/111472725110173916234/posts>
>
>
