Upload to static file in flask project

def create():
    if request.method == 'POST':
            file = request.files["video"]
            stream = ffmpeg.input(file)
            stream = ffmpeg.hflip(stream)
            stream = ffmpeg.output(stream, app.root_path + '/' + app.config['UPLOAD_FOLDER'] + '/videos/dd.mp4')
            ffmpeg.run(stream)

-filter_complex: No such file or directory (error from ffmpeg)

Any solution for my problem? I try change directory and check directory before pass a path but error still same.

[depau]

I don’t know exactly how Flask deals with POSTed files but I think it gives you a file-like object you can read from. If so, you should call ffmpeg manually (i.e. p = subprocess.Popen(stream.compile(), stdin=subprocess.PIPE)), use stdin as input in ffmpeg (use pipe:1 as the file name, see this), then write to the pipe with a loop, i.e. (code not tested)

CHUNK_SIZE = 1024
data = file.read(CHUNK_SIZE)
while data:
    p.stdin.write(data)
    data = file.read(CHUNK_SIZE)

Check Flask’s documentation to see how to stream POST data like that.

[krrishdholakia]

@Honghe Did some further digging,

here’s what i’m getting:

pipe:0: Invalid data found when processing input

This is what my function looks like:

` @app.route(“/”, methods=[‘GET’, ‘POST’]) def hello_world(): print("request: ", request) print("request.files: ", request.files)

""" Convert Flask mp3 file to wav and save
Flask request.file is wrap request.file.stream
And request.file.stream ia type: tempfile.SpooledTemporaryFile
tempfile.SpooledTemporaryFile: Temporary file wrapper, specialized to switch from BytesIO \
or StringIO to a real file when it exceeds a certain size or when a fileno is needed.
:param file:
:return:
"""
file = request.files['file']
f_path = "upload_file.wav"
stream = ffmpeg.input('pipe:0')
stream = ffmpeg.output(stream, f_path, acodec='pcm_s16le', ac=1, ar='16k')
# TODO, prompt and log when overwrite
stream = ffmpeg.overwrite_output(stream)
# call ffmpeg manually (i.e. p = subprocess.Popen(stream.compile(), stdin=subprocess.PIPE)),

# stream.compile() Build command-line for invoking ffmpeg.
# subprocess.Popen() Execute a child program in a new process
p = subprocess.Popen(stream.compile(), stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
CHUNK_SIZE = 1024
data = file.read(CHUNK_SIZE)
print("data type: ", type(data))
p.stdin.write(data)
# while data:
#     p.stdin.write(data)
#     data = file.read(CHUNK_SIZE)
#     print("data type: ", type(data))
print(p.communicate())
# upload.upload_file_main('upload_file.wav')
return "<p>Hello, World!</p>"

`