No data written to stdin or stderr from ffmpeg

问题

I have a dummy client that is suppose to simulate a video recorder, on this client i want to simulate a video stream; I have gotten so far that i can create a video from bitmap images that i create in code.

The dummy client is a nodejs application running on an Raspberry Pi 3 with the latest version of raspian lite.

In order to use the video I have created, I need to get ffmpeg to dump the video to pipe:1. The problem is that I need the -f rawvideo as a input parameter, else ffmpeg can't understand my video, but when i have that parameter set ffmpeg refuses to write anything to stdio

ffmpeg is running with these parameters

ffmpeg -r 15 -f rawvideo -s 3840x2160 -pixel_format rgba -i pipe:0 -r 15 -vcodec h264 pipe:1

Can anybody help with a solution to my problem?

--Edit

Maybe i sould explain a bit more. The system i am creating is to be set up in a way, where instead of my stream server ask the video recorder for a video stream, it will be the recorder that tells the server that there is a stream.

回答1:

I have have slowed my problem on my own. (-:

i now have 2 solutions.

1. Is to change my -f rawvideo to -f data that works for me anyways.
2. I can encode my bitmaps as jpeg in code and pipe my jpeg images to stdin. This also requires me to change the ffmpeg parameters to -r 4 -f mjpeg -i pipe:0 -r 4 -vcodec copy -f mjpeg pipe:1 and is by far the slowest thing i have ever done. and i can't use a 4k input

thanks @Mulvya for trying to help.

@eFox Thanks for editing my stupid spelling and grammar mistakes

来源：https://stackoverflow.com/questions/47790255/no-data-written-to-stdin-or-stderr-from-ffmpeg