[FFmpeg-user] Error and understanding issue: using ffmpeg to real time publish FLV file to Red5 and real time download FLV from Red5

[Qianliang Zhang]

About 1, input.flv's codecs ?

About 2, maybe you can try ffmpeg -i
"rtmp://localhost/oflaDemo/streams/hobbit_vp6.flv
live=1" -c copy
dump.flv


On Sat, Aug 30, 2014 at 12:34 AM, Kajari Ghosh Dastidar <kajarigd at gmail.com>
wrote:

> Hello!
> I am new to ffmpeg, and trying to understand how to use it publish a live
> stream to a server, and how to record a live stream from a server. After
> reading online tutorials and visiting few forums, I got a brief overview of
> how to get it done. But, I think my understanding is not fully correct.
> Also, the commands I am running, are giving errors. Below I have listed
> down what I am trying to do, how I am doing it and why.
>
> OS: Windows 8, RTMP Server: Red5, Video File format: FLV, I want to:
> Read/Write FLV files from and to Red5 by live streaming.
>
> 1. To publish FLV file from local I am using this command at Command Line:
>
>     ffmpeg -re -i input.flv -acodec copy -vcodec copy -f flv
> rtmp://ocalhost/oflaDemo/streams
>
> My understanding: This command will upload input.flv to the server location
> C:\Program Files\red5\webapps\oflaDemo\streams. So, after the command is
> done running, I expect in this server location a new file input.flv will be
> created. Is this correct?
>
> When I am running this command I am getting the following error and no file
> is getting created on the server side:
>
>     [flv @ 03c6a660] Failed to update header with correct duration.
>     [flv @ 03c6a660] Failed to update header with correct filesize.
>     frame= 1567 fps= 24 q=-1.0 Lsize=    3064kB time=00:01:05.43 bitrate=
> 383.6kbits
>     /s
>     video:2232kB audio:767kB subtitle:0kB other streams:0kB global
> headers:0kB muxin
>     g overhead: 2.183349%
>
> Can you help me understand what I am doing wrong? What should be correct
> command in this case to achieve what I want?
>
> 2. Now, I am using the following command to livestream read a FLV file from
> the server into my local:
>
>     ffmpeg -re -i rtmp://localhost/oflaDemo/streams/hobbit_vp6.flv -c copy
> dump.flv
>
> My understanding: File hobbit_vp6.flv will be downloaded into my local
> directory and will get saved as dump.flv. And this will be live streaming.
> This will be like, recording a video stream from the server. Is this
> correct?
>
> When I am running this command I am getting the following error and no file
> is getting created on the local:
>
>     Closing connection: NetStream.Play.StreamNotFound
> rtmp://localhost/oflaDemo/streams/hobbit_vp6.flv: Unknown error occurred
>
> Can you help me understand what I am doing wrong? What should be correct
> command in this case to achieve what I want?
>
> Note: I was not aware of this mailing list before. Hence, have posted this
> question in stackoverflow as well:
>
> http://stackoverflow.com/questions/25567675/error-and-understanding-issue-using-ffmpeg-to-real-time-publish-flv-file-to-red
>
> Thanks,
> Kajari
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