Apostrophes are escaped a little too much

Hello, I’m not 100% sure this is an issue with this library or if it’s something else, but basically I am attempting to use the ‘subtitles’ filter by feeding it an mkv file, ffmpeg always crashes and when I printed the stream arguments I got the below: ['-i', "tes't.mkv", '-filter_complex', "[0]subtitles=tes\\\\\\\\\\\\\\'t.mkv[s0]", '-map', '[s0]', "tes't.mkv2.mkv"]

This is for a file called tes't.mkv

This is a script I recreated this with:

import ffmpeg
import sys

file_path = "tes't.mkv"

def convert_video(file_path):
    #Create a stream
    stream = ffmpeg.input(file_path)
    #Apply subtitle filter
    stream = ffmpeg.filter_(stream,'subtitles',str(file_path))
    #Output file
    stream = ffmpeg.output(stream, file_path + '2.mkv')
    #Get to work
    print(ffmpeg.get_args(stream))

convert_video(file_path)

If I attempt to run this stream then ffmpeg crashes with the below error:

[Parsed_subtitles_0 @ 0x5591972f24a0] Unable to open tes\'t.mkv
[AVFilterGraph @ 0x5591972cd1c0] Error initializing filter 'subtitles' with args 'tes\\\'t.mkv'
Error initializing complex filters.
No such file or directory
Traceback (most recent call last):
  File "test.py", line 16, in <module>
    convert_video(file_path)
  File "test.py", line 14, in convert_video
    ffmpeg.run(stream)
  File "/home/baa/.local/lib/python3.6/site-packages/ffmpeg/_run.py", line 212, in run
    raise Error('ffmpeg', out, err)
ffmpeg._run.Error: ffmpeg error (see stderr output for detail)

[lzkzls]

Hi, has this problem been solved? I have the same problem.

[JurgenDJ]

Running against the same issue when trying to scale down. Simplified code example:

inputstream = ffmpeg.input(infile, ss='00:00:10.000', t='00:00:20.000')# start after 10s, sequence of 20s duration
# v0 = inputstream['v'].filter_('scale',"320:240") # this doesn't work, resulting in get_args item: '[0:v]scale=320\\\\\\\\\\\\:240[s0]'
v0 = inputstream['v'].filter_('scale',"320x240") # this works, resulting in get_args item '[0:v]scale=320x240[s0]'
a0 = inputstream['a']
outstream = ffmpeg.output(v0,a0, outfile, acodec='aac', audio_bitrate='96K',vcodec='libx265', crf='23' )

print(outstream.get_args())
outstream.run()

I’m actually trying to scale conditionally (only scale down for if source has bigger dimensions), for that I need to enter a more complex scaling value which involves expressions as found on https://trac.ffmpeg.org/wiki/Scaling