[FFmpeg-user] [FFMPEG] Audio/Video Syncing

[Guillermo Martinez]

Hi Everyone,

Good morning.

I would like to follow-up if there are other solutions I do based on the
logs and information I have provided? Thanks!

Regards,

Guillermo

On 1/15/2016 4:27 PM, Guillermo Martinez wrote:
> Hi Carl,
>
> Good afternoon.
>
> Thank you very much for the reply.
>
> On 1/13/2016 9:49 PM, Carl Eugen Hoyos wrote:
>> Guillermo Martinez <94dlve1izy52e5t <at> gmail.com> writes:
>>
>>> ffmpeg -y -ihttp://192.168.0.11:8090/VIDEO_CAM1.mpg  
>>> -itsoffset 1.0 -ihttp://192.168.0.11:8090/AUDIO.mp2  
>>> -map 0:0 -map 1:0 test.mp4
>> Complete, uncut console output missing.
> Sorry about that. The following are console outputs from the client 
> with and without the "*itsoffset*" option:
> ==========================================================================================
> *1. **ffmpeg -y -i **http://192.168.0.11:8090/VIDEO_CAM1.mpg**-i 
> **http://192.168.0.11:8090/AUDIO.mp2**-map 0:0 -map 0:0 -t 15 test.mp4 
> 2> ffmpeg_client_without_itsoffset.txt*
>         - without the "itsoffset" option
>         - 
> https://www.dropbox.com/s/hfo2newv7x4o12t/ffmpeg_client_without_itsoffset.txt?dl=0
>
> ***2. **ffmpeg -y -i 
> **http://192.168.0.11:8090/VIDEO_CAM1.mpg**-itsoffset 1.0 -i 
> **http://192.168.0.11:8090/AUDIO.mp2**-map 0:0 -map 0:0 -t 15 test.mp4 
> 2> ffmpeg_client_with_itsoffset.txt*
>         - with the "itsoffset" option
>         - 
> https://www.dropbox.com/s/dirfkb3yndwtjni/ffmpeg_client_with_itsoffset.txt?dl=0
> ==========================================================================================
>
> I would also like to share my "*ffserver.conf*" and "*input ffmpeg 
> commands*"
> ==========================================================================================
> *1. ffserver.conf
> * https://www.dropbox.com/s/cf3kgyfimq6dgcr/ffserver.conf?dl=0*
> *
> *2. ffmpeg input commands (to ffserver)*
> https://www.dropbox.com/s/mdl5gufzuc59wmz/start.ffmpeg.sh?dl=0
> ==========================================================================================
>
> Hope this helps in getting further insight.
>
>> Unfortunately, I suspect your http sources do not provide timestamps, 
>> so there is no easy solution;-( 
> I see. The stream that seems to always start at *dts=0* is the audio 
> stream.
>
> Please refer to the following outputs of ffprobe:
> ==========================================================================================
> *1. ffprobe -i http://192.168.0.11:8090:AUDIO.mp2 -show_frames*
>         - https://www.dropbox.com/s/xb5t88rc3vdyc0y/ffprobe_audio.txt?dl=0
>         - pkt_dts and pkt_pts always start at 0
>
> *2. ffprobe -i http://192.168.0.11:8090:VIDEO_CAM1.mpg -show_frames*
>         - https://www.dropbox.com/s/ywxgznv8xjbqozj/ffprobe_video.txt?dl=0
>         - pkt_dts and pkt_pts always start non-zero
> ==========================================================================================
>
> I think that the solution is to add timestamp to the audio stream. But 
> I already tried
> using the "*use_wallclock_as_timestamp*" option in ffmpeg audio feed. 
> Nothing happened.
> Is there any other way to do this?
>
> I am very sorry for the inconvenience. I am not much of a programmer, 
> but more
> of an enthusiast. I am using FFmpeg in my home for personal security 
> and surveillance.
>
> Regards,
>
> Guillermo Martinez
>
>> Carl Eugen
>>
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>



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