multiple values 'map'

[BramFr]

Hey,

is there any way to have multi values options like map?

ffmpeg.output(streams_input, path_movie_mp4, **ffmpeg_kwargs).global_args('-map', '0').global_args('-map', '0:m:language:eng').run()

or

ffmpeg.output(streams_input, map=0, map='0:m:language:eng', path_movie_mp4, **ffmpeg_kwargs).run()

I`ll create a python script that will run on a directory within a lot of mkv files. I want to convert every mkv file to mp4. But i do not want any audio language only eng and dutch.

TypeError: output() got multiple values for keyword argument 'map'

[Kotters]

Mapping is handled by ffmpeg-python. You can see this by running ffmpeg.output().compile(). The API Reference documentation shows you how to specify which streams you want to have mapped to your output. Here's an example of how I've used ffmpeg-python to select streams for batch conversion:

outputVid = inputFile['v:0'].filter_('subtitles', subfile, si=subIndex)
outputAud = inputFile['a:0']

ffmpegRun = ffmpeg.output(outputVid, outputAud, outFilename, **ffmpegFlags).run()

You can see here I've specified the first video stream and the first audio stream. Input nodes expose their streams through a dict, and you can specify them using FFMPEG's stream identifiers.

[BramFr]

Mapping is handled by ffmpeg-python. You can see this by running ffmpeg.output().compile(). The API Reference documentation shows you how to specify which streams you want to have mapped to your output. Here's an example of how I've used ffmpeg-python to select streams for batch conversion:

outputVid = inputFile['v:0'].filter_('subtitles', subfile, si=subIndex)
outputAud = inputFile['a:0']

ffmpegRun = ffmpeg.output(outputVid, outputAud, outFilename, **ffmpegFlags).run()

You can see here I've specified the first video stream and the first audio stream. Input nodes expose their streams through a dict, and you can specify them using FFMPEG's stream identifiers.

I understand. But sometimes i have 3 outputAud and the other time just only one. it's not a dict that i can use same as **ffmpegFlags

[modbender]

I have 4 streams (video, audio, subtitles, attachments) to copy, so I need

'map': '0:s?',
'map': '0:t',

but dict doesn't support duplicates so it ignores 0:s? and only takes 0:t

I tried

stream = stream.global_args('-map', '0:s?')
stream = stream.global_args('-map', '0:t')

but it says trailing options found which will be ignored.

[sophiefitzpatrick]

I solved multiple map values with:

# The raw command I'm recreating in python using ffmpeg-python library: 
# ffmpeg -i example.webm -i example.ogg -map 0:v -map 1:a -shortest output.mp4

# handles multiple input
video = ffmpeg.input(in_path_video)
audio = ffmpeg.input(in_path_audio)

# handles multiple -map flags
output_video = video['v']
output_audio = audio['a']

ffmpeg
      .filter([video, audio], 'overlay', 10, 10)
      .output(
           output_video,
           output_audio,
           out_path,
           shortest=1,
       )
       .run(
           capture_stdout=True,
           capture_stderr=True,
       )

# for debugging - what do my args look like?       
command_args = ffmpeg.output(output_video, output_audio, out_path, shortest=1)
print(ffmpeg.get_args(command_args))

# printed args - as you can see everything I specified in my bash command is there
[u'-i', 'example.webm', u'-i', 'example.ogg', u'-map', u'0:v', u'-map', u'1:a', u'-shortest', u'1', 'output.mp4']

[PiotrDabkowski]

This lib is much less intuitive than command line for tricky cases.