The Python code sample applies the following stages: I just couldn't figure out how to apply the mapping with ffmpeg-python module. The Python code sample, uses subprocess module, instead of using ffmpeg-python. Since we are using stderr for the video output, we need to avoid any printing to stderr, so we are adding -hide_banner -loglevel error arguments. Instead of mapping the output to files, we may map the output to stderr and stdout: ffmpeg -hide_banner -loglevel error -f lavfi -i testsrc=size=192x108:rate=1:duration=10 -f lavfi -i sine=frequency=400:r=16384:duration=10 -vcodec rawvideo -pix_fmt rgb24 -map 0:v -f:v rawvideo pipe:2 -acodec pcm_s16le -ar 16384 -ac 1 -map 1:a -f:a s16le pipe:1 -report The above command creates synthetic video and synthetic audio, and maps the raw video to vid.yuv file, and maps the raw audio to aud.pcm file.įor testing, execute the above command, and keep vid.yuv and aud.pcm as references. The following FFmpeg CLI command may be used as reference: ffmpeg -y -f lavfi -i testsrc=size=192x108:rate=1:duration=10 -f lavfi -i sine=frequency=400:r=16384:duration=10 -vcodec rawvideo -pix_fmt rgb24 -map 0:v -f:v rawvideo vid.yuv -map 1:a -acodec pcm_s16le -ar 16384 -ac 1 -f:a s16le aud.pcm įor creating a simple demonstration of the concept, the example uses synthetic video and audio as input. Process = out_n_async(pipe_stdout=True)įor splitting the video and audio, you may map the video output to stderr pipe and map the audio output to stdout pipe. It is not clear how many bytes to read information, and most importantly, what is in these bytes of audio, or is it video? input_stream = ffmpeg.input(in_url) Misunderstanding appears when there is both video and audio in the stream.
I studied an example with getting a numpy array from audio and video separately (when either one or the second is present in the stream)Īnd everything works successfully. Ideally, I would like to get 1 numpy array per data type per unit of time. I'm trying to implement a data parsing process (video and audio) from an ffmpeg stream for each frame. I was not able to reopen the question and maybe formulate it in more detail. I already created a similar thread How to extract video and audio from ffmpeg stream in python, but within the framework of the consultations received, I could not implement what I asked about.
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