advance use for api

[erfantkerfan]

Hi
I want to send a progress bar percent and time estimation to my frontend app.
is it possible to get that in another python app and send it via socket to the frontend app?
could you demonstrate how?

[althonos]

Hi @erfantkerfan

I changed the signature of ffpb.main so that you can pass it a tqdm.tqdm subclass. With this, you should be able to write a custom subclass that interacts with your frontend.

[modbender]

Could you give an example of for extracting only the progress number?

[erfantkerfan]

I don't have the time to explain it fully but I used something like this

command = "ffprobe -v error -hide_banner -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 -i \"" + str(
         self.file_name) + "\""
         ffprobe_process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
                                        universal_newlines=True, shell=True)
         out, err = ffprobe_process.communicate()
         reg = re.search('\d*\.\d*', str(err) + str(out))

above command to get the total time

thread = threading.Thread(target=self.start_convert,
                                   args=(self.file_name, modified_file_name_hq, modified_file_name_240p))
thread.start()
         while thread.is_alive():
             self.progress_hq['value'] = parse_seconds(self.ffmpeg_time_hq) / self.total_duration * 100
             self.progress_240p['value'] = parse_seconds(self.ffmpeg_time_240p) / self.total_duration * 100
             self.root.update()

and used to above command to update the tkinnter interface

[althonos]

To use a custom tqdm.tqdm subclass:

class ProgressBar(tqdm.tqdm):
    def update(self, n):
        super().update(n)
        # now put here whatever code you need to update your 
        # GUI or whatever

        # self.n is the current progress
        # self.total is the total

ffpb.main(["-i", "input.mp4", "output.mkv", tqdm=ProgressBar)

[pablofiumara]

I needed to add self to make that work. Final code:

import tqdm
class ProgressBar(tqdm.tqdm):
    def update(self, n):
        super().update(n)
        print(self.n)
        print(self.total)