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

[Steven Liu]

2017-08-01 12:13 GMT+08:00 Steven Liu <lingjiujianke at gmail.com>:
> 2017-07-31 14:45 GMT+08:00 qw <applemax82 at 163.com>:
>> 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" <lingjiujianke at gmail.com> wrote:
>>>2017-07-10 20:24 GMT+08:00 qw <applemax82 at 163.com>:
>>>> 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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>>
>>
>>
>>
>>
>>
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