Re: [Libav-user] can ffmpeg support add audio/video stream dynamically

[Steven Liu]

2017-07-31 14:45 GMT+08:00 qw :
> Hi,
>
>>> I have one question about ffmpeg's one key function. If ffmpeg fetch one
>>> rtmp stream from one rtmp server and no audio stream is available at the
>>> beginning, then ffmpeg only detect video stream without audio stream.
>>> However, after several minutes, one audio stream existed in rtmp stream,
>>> how
>>> ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
>>> dynamically, or ffmpeg functions/structures need to be reset?
>>do you mean probesize?
>
>
> what i mean is, does ffmpeg take the following cases into consideration:
> 1) audio stream is sent in rtmp stream at the beginning, and after sometime
> such as 5 minutes or 1 hours, one new video stream is added in rtmp stream
> 2) video stream is sent in rtmp stream at the beginning, and after sometime
> such as 5 minutes or 1 hours, one new audio stream is added in rtmp stream
>
> does ffmpeg support the above cases?
Maybe not :)
>
>
>
>
> At 2017-07-12 14:18:27, "Steven Liu"  wrote:
>>2017-07-10 20:24 GMT+08:00 qw :
>>> Hi,
>>>
>>> I have one question about ffmpeg's one key function. If ffmpeg fetch one
>>> rtmp stream from one rtmp server and no audio stream is available at the
>>> beginning, then ffmpeg only detect video stream without audio stream.
>>> However, after several minutes, one audio stream existed in rtmp stream,
>>> how
>>> ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
>>> dynamically, or ffmpeg functions/structures need to be reset?
>>do you mean probesize?
>>>
>>> Thanks!
>>>
>>> Regards
>>>
>>> Andrew
>>>
>>>
>>>
>>>
>>>
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>
>
>
>
>
>
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Re: [Libav-user] can ffmpeg support add audio/video stream dynamically

[Steven Liu]

2017-08-01 12:13 GMT+08:00 Steven Liu :
> 2017-07-31 14:45 GMT+08:00 qw :
>> Hi,
>>
 I have one question about ffmpeg's one key function. If ffmpeg fetch one
 rtmp stream from one rtmp server and no audio stream is available at the
 beginning, then ffmpeg only detect video stream without audio stream.
 However, after several minutes, one audio stream existed in rtmp stream,
 how
 ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
 dynamically, or ffmpeg functions/structures need to be reset?
>>>do you mean probesize?
>>
>>
>> what i mean is, does ffmpeg take the following cases into consideration:
>> 1) audio stream is sent in rtmp stream at the beginning, and after sometime
>> such as 5 minutes or 1 hours, one new video stream is added in rtmp stream
>> 2) video stream is sent in rtmp stream at the beginning, and after sometime
>> such as 5 minutes or 1 hours, one new audio stream is added in rtmp stream
>>
>> does ffmpeg support the above cases?
> Maybe not :)
Ah, you can alloc a new stream and remux a new format to fix this?
>>
>>
>>
>>
>> At 2017-07-12 14:18:27, "Steven Liu"  wrote:
>>>2017-07-10 20:24 GMT+08:00 qw :
 Hi,

 I have one question about ffmpeg's one key function. If ffmpeg fetch one
 rtmp stream from one rtmp server and no audio stream is available at the
 beginning, then ffmpeg only detect video stream without audio stream.
 However, after several minutes, one audio stream existed in rtmp stream,
 how
 ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
 dynamically, or ffmpeg functions/structures need to be reset?
>>>do you mean probesize?

 Thanks!

 Regards

 Andrew





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>>
>>
>>
>>
>>
>>
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Re: [Libav-user] can ffmpeg support add audio/video stream dynamically

[qw]

Hi,


>> I have one question about ffmpeg's one key function. If ffmpeg fetch one
>> rtmp stream from one rtmp server and no audio stream is available at the
>> beginning, then ffmpeg only detect video stream without audio stream.
>> However, after several minutes, one audio stream existed in rtmp stream, how
>> ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
>> dynamically, or ffmpeg functions/structures need to be reset?
>do you mean probesize?



what i mean is, does ffmpeg take the following cases into consideration:
1) audio stream is sent in rtmp stream at the beginning, and after sometime 
such as 5 minutes or 1 hours, one new video stream is added in rtmp stream
2) video stream is sent in rtmp stream at the beginning, and after sometime 
such as 5 minutes or 1 hours, one new audio stream is added in rtmp stream


does ffmpeg support the above cases?







At 2017-07-12 14:18:27, "Steven Liu"  wrote:
>2017-07-10 20:24 GMT+08:00 qw :
>> Hi,
>>
>> I have one question about ffmpeg's one key function. If ffmpeg fetch one
>> rtmp stream from one rtmp server and no audio stream is available at the
>> beginning, then ffmpeg only detect video stream without audio stream.
>> However, after several minutes, one audio stream existed in rtmp stream, how
>> ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
>> dynamically, or ffmpeg functions/structures need to be reset?
>do you mean probesize?
>>
>> Thanks!
>>
>> Regards
>>
>> Andrew
>>
>>
>>
>>
>>
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>> Libav-user@ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
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Re: [Libav-user] can ffmpeg support add audio/video stream dynamically

[Steven Liu]

2017-07-10 20:24 GMT+08:00 qw :
> Hi,
>
> I have one question about ffmpeg's one key function. If ffmpeg fetch one
> rtmp stream from one rtmp server and no audio stream is available at the
> beginning, then ffmpeg only detect video stream without audio stream.
> However, after several minutes, one audio stream existed in rtmp stream, how
> ffmpeg to do with the case? Can ffmpeg functions add the new audio stream
> dynamically, or ffmpeg functions/structures need to be reset?
do you mean probesize?
>
> Thanks!
>
> Regards
>
> Andrew
>
>
>
>
>
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> Libav-user@ffmpeg.org
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