[FFmpeg-user] Howto specify needed options for ffmpeg

[Thomas Seilund]

On 9/23/20 10:42 PM, Carl Eugen Hoyos wrote:
> Am Mi., 23. Sept. 2020 um 17:24 Uhr schrieb Thomas Seilund via
> ffmpeg-user <ffmpeg-user at ffmpeg.org>:
>
>> Now I write to udp and not to a local file with this command:
>>
>> raspivid -t 0 -b 10000000 -n -o udp://239.255.42.42:5004
>> Connecting to 239.255.42.42:5004...connected, sending video...
>>
>>
>> On the same host I read from udp with this command - video is never
>> displayed
>>
>> ffplay -f h264 -i udp://239.255.42.42:5004
> In general, you should not force the input format.
>
> You should be able to record the udp stream with tcpdump,
> you can then investigate the output file.

I will try to investigate. It was my idea to force the input format. How 
come that is not a good idea?

>
>> ffplay version N-97152-g52523b6963 Copyright (c) 2003-2020 the FFmpeg
>> developers built with gcc 8 (Raspbian 8.3.0-6+rpi1)
>>    configuration: --extra-libs='-lpthread -lm' --enable-gpl
>> --enable-libass --enable-libfreetype --enable-libmp3lame
>> --enable-libvorbis --enable-libx264 --disable-doc --enable-nonfree
> Is this binary distributed somewhere?
I used apt-get install on Raspberry Pi.
>
> Carl Eugen
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