new option to extract as mp3? is this possible? #2

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@rg3 commented on GitHub (Nov 1, 2010):

The internal code in youtube-dl allows for postprocessing, so anybody can implement a postprocessor to extract the audio from the video file using an external tool (like obeythepenguin said, youtube-dl just downloads the raw video file without looking at its internal format). I'd gladly merge that code into the program if someone is willing to maintain that part. I haven't implemented any postprocessing yet because I don't postprocess any video.

I'm leaving the issue open just in case someone wants me to merge it.

@rg3 commented on GitHub (Nov 1, 2010): The internal code in youtube-dl allows for postprocessing, so anybody can implement a postprocessor to extract the audio from the video file using an external tool (like obeythepenguin said, youtube-dl just downloads the raw video file without looking at its internal format). I'd gladly merge that code into the program if someone is willing to maintain that part. I haven't implemented any postprocessing yet because I don't postprocess any video. I'm leaving the issue open just in case someone wants me to merge it.

deekerman commented

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@rg3 commented on GitHub (Nov 1, 2010):

Originally by "rmunn":

In the meantime, one easy way to extract the audio from a downloaded video file is to use Audacity (http://audacity.sourceforge.net/). Open the .mp4 in Audacity and it will automatically extract the audio for you -- then just do File -> Export and save it as an .mp3. (Remember to download the LAME DLL for Audacity so it can save MP3's, of course (see http://audacity.sourceforge.net/help/faq?s=install&item=lame-mp3 for details).

@rg3 commented on GitHub (Nov 1, 2010): Originally by "rmunn": In the meantime, one easy way to extract the audio from a downloaded video file is to use Audacity (http://audacity.sourceforge.net/). Open the .mp4 in Audacity and it will automatically extract the audio for you -- then just do File -> Export and save it as an .mp3. (Remember to download the LAME DLL for Audacity so it can save MP3's, of course (see http://audacity.sourceforge.net/help/faq?s=install&item=lame-mp3 for details).

deekerman commented

via http://www.catonmat.net/blog/how-to-extract-audio-tracks-from-youtube-videos/

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@rg3 commented on GitHub (Nov 1, 2010):

Originally by anonymous:

ffmpeg.exe -i My_Chemical_Romance_-_Famous_Last_Words.flv famous_last_word.mp3

@rg3 commented on GitHub (Nov 1, 2010): Originally by anonymous: ffmpeg.exe -i My_Chemical_Romance_-_Famous_Last_Words.flv famous_last_word.mp3 via http://www.catonmat.net/blog/how-to-extract-audio-tracks-from-youtube-videos/

deekerman commented

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@rg3 commented on GitHub (Nov 1, 2010):

Originally by anonymous:

And add -ab parameter to ffmpeg to set the audio bitrate (default is 64k).

ffmpeg -ab 192k -i <input.file> <output.file>

@rg3 commented on GitHub (Nov 1, 2010): Originally by anonymous: And add -ab parameter to ffmpeg to set the audio bitrate (default is 64k). ffmpeg -ab 192k -i <input.file> <output.file>

deekerman commented

2026-02-20 20:59:14 -05:00

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@rg3 commented on GitHub (Nov 1, 2010):

Originally by anonymous:

Or with mplayer:

$ mplayer -dumpaudio -dumpfile out.mp3

Maybe to add a generic postprocessor that calls external programs like mplayer, ffmpeg or what ever. The command should also accept "variables" similar to the litteral titel formating rules, e.g

$ youtube-dl http://www.youtube.com/watch?v=foobar -i "mplayer -dumpaudio %(filename)s -dumpfile %(title)s.mp3"

Maybe it is just the work of adding some lines to the program ...

Alex

@rg3 commented on GitHub (Nov 1, 2010): Originally by anonymous: Or with mplayer: $ mplayer -dumpaudio <video-file> -dumpfile out.mp3 Maybe to add a generic postprocessor that calls external programs like mplayer, ffmpeg or what ever. The command should also accept "variables" similar to the litteral titel formating rules, e.g $ youtube-dl http://www.youtube.com/watch?v=foobar -i "mplayer -dumpaudio %(filename)s -dumpfile %(title)s.mp3" Maybe it is just the work of adding some lines to the program ... Alex

deekerman commented

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@lx5415 commented on GitHub (Dec 19, 2010):

I've written a program (PC) to extract an mp3 from the video file. If anyone is interested email me lx5415@gmail.com

@lx5415 commented on GitHub (Dec 19, 2010): I've written a program (PC) to extract an mp3 from the video file. If anyone is interested email me lx5415@gmail.com

deekerman commented

2026-02-20 20:59:14 -05:00

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@rg3 commented on GitHub (Dec 19, 2010):

The issue tracker is no place for promoting your own software. mplayer can trivially extract the audio from the video file, and it works on many platforms. The issue at hand here is if someone is willing to code a postprocessor that uses it, or other software, to extract the MP3 and integrate it with youtube-dl.

@rg3 commented on GitHub (Dec 19, 2010): The issue tracker is no place for promoting your own software. mplayer can trivially extract the audio from the video file, and it works on many platforms. The issue at hand here is if someone is willing to code a postprocessor that uses it, or other software, to extract the MP3 and integrate it with youtube-dl.

deekerman commented

2026-02-20 20:59:14 -05:00

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@lx5415 commented on GitHub (Dec 19, 2010):

i forgot to mention that it is free and open and it uses youtube_dl. I am in no way trying to sell anything. I am just trying to contribute to the open source community. This may or may not be warranted in this forum. Sorry!

@lx5415 commented on GitHub (Dec 19, 2010): i forgot to mention that it is free and open and it uses youtube_dl. I am in no way trying to sell anything. I am just trying to contribute to the open source community. This may or may not be warranted in this forum. Sorry!

deekerman commented

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@chrisbra commented on GitHub (Feb 16, 2011):

https://github.com/chrisbra/youtube2audio uses youtube-dl or clive to extract videos from youtube and convert it to mp3 or ogg.

Christian

@chrisbra commented on GitHub (Feb 16, 2011): https://github.com/chrisbra/youtube2audio uses youtube-dl or clive to extract videos from youtube and convert it to mp3 or ogg. Christian

deekerman commented

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@dz0ny commented on GitHub (Feb 20, 2011):

Hi simple implementation can be found at https://github.com/dz0ny/YoutubeDl-Server

@dz0ny commented on GitHub (Feb 20, 2011): Hi simple implementation can be found at https://github.com/dz0ny/YoutubeDl-Server

deekerman commented

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@ph03 commented on GitHub (Feb 21, 2011):

I'd loved to see an option that rg3 suggested that calls a given program with the downloaded file after succesful download. I automatically download some videos every day but want to reencode them at night for my Android phone with optimal settings and this would be very easy using such an option. I think i'll implement it by myself and let you know if it works.

@ph03 commented on GitHub (Feb 21, 2011): I'd loved to see an option that rg3 suggested that calls a given program with the downloaded file after succesful download. I automatically download some videos every day but want to reencode them at night for my Android phone with optimal settings and this would be very easy using such an option. I think i'll implement it by myself and let you know if it works.

deekerman commented

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@dz0ny commented on GitHub (Feb 21, 2011):

Implement class
class ToFFmpegMP4(youtubedl.PostProcessor):
def run(self, inf):
command = "/usr/bin/ffmpeg -i '%s' -vcodec libx264 -vpre slow -vpre ipod640 -b 2048k -acodec libfaac -ab 96k '%s' && rm '%s' &" % (inf["filepath"] ,VideoPath + "/" + inf["title"] + ".mp4", inf["filepath"])
os.system(command) ## WARNING shell injection
return inf

then add
ffmpeg = ToFFmpegMP4()
fd.add_post_processor(ffmpeg)

again see my project, for more complete example https://github.com/dz0ny/YoutubeDl-Server/blob/master/youtubedl-server.py

@dz0ny commented on GitHub (Feb 21, 2011): Implement class class ToFFmpegMP4(youtubedl.PostProcessor): def run(self, inf): command = "/usr/bin/ffmpeg -i '%s' -vcodec libx264 -vpre slow -vpre ipod640 -b 2048k -acodec libfaac -ab 96k '%s' && rm '%s' &" % (inf["filepath"] ,VideoPath + "/" + inf["title"] + ".mp4", inf["filepath"]) os.system(command) ## WARNING shell injection return inf then add ffmpeg = ToFFmpegMP4() fd.add_post_processor(ffmpeg) again see my project, for more complete example https://github.com/dz0ny/YoutubeDl-Server/blob/master/youtubedl-server.py

deekerman commented

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@rg3 commented on GitHub (Feb 21, 2011):

dz0ny,

Why don't you clean that part of the code a little bit, avoid the command injection problem and submit a postprocessor to be integrated with the program, activated by a command line switch?

That way every youtube-dl user would benefit from the postprocessor.

@rg3 commented on GitHub (Feb 21, 2011): dz0ny, Why don't you clean that part of the code a little bit, avoid the command injection problem and submit a postprocessor to be integrated with the program, activated by a command line switch? That way every youtube-dl user would benefit from the postprocessor.

deekerman commented

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@dz0ny commented on GitHub (Feb 21, 2011):

@rg3 would something like this, be sufficient?

Transcoding Options (uses ffmpeg):
-T FILE_TYPE, --transcode_to=FILE_TYPE
                    transcode to specific video or audio format (example:
                    mp3 mp4 mov mkv)
--transcode_extra=ARGS
                    pass additional parameters to ffmpeg (example: -vcodec
                    libx264 -vpre slow -vpre ipod640 -b 2048k -acodec
                    libfaac -ab 96k)

@dz0ny commented on GitHub (Feb 21, 2011): @rg3 would something like this, be sufficient? ``` Transcoding Options (uses ffmpeg): -T FILE_TYPE, --transcode_to=FILE_TYPE transcode to specific video or audio format (example: mp3 mp4 mov mkv) --transcode_extra=ARGS pass additional parameters to ffmpeg (example: -vcodec libx264 -vpre slow -vpre ipod640 -b 2048k -acodec libfaac -ab 96k) ```

deekerman commented

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@ph03 commented on GitHub (Feb 22, 2011):

@dz0ny I would rather also like to be able to call a costum command with the downloaded file like

-i COMMAND, --excecute=COMMAND
excecutes the command given by the string COMMAND by
replacing '%f' with the downloaded file name.

I think this would be more flexible as everyone can call his own commands (e.g., not only for transcoding but to schedule other events on downloaded files, e.g., movement etc). I need it because I would like to be able to do two pass encodings which would not be possible with your single ffmpeg transcode command. But the -T option should still be usefull in many situations.

@ph03 commented on GitHub (Feb 22, 2011): @dz0ny I would rather also like to be able to call a costum command with the downloaded file like -i COMMAND, --excecute=COMMAND excecutes the command given by the string COMMAND by replacing '%f' with the downloaded file name. I think this would be more flexible as everyone can call his own commands (e.g., not only for transcoding but to schedule other events on downloaded files, e.g., movement etc). I need it because I would like to be able to do two pass encodings which would not be possible with your single ffmpeg transcode command. But the -T option should still be usefull in many situations.

deekerman commented

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@ph03 commented on GitHub (Feb 22, 2011):

B.t.w. yesterday I implemented my transcoder event as a postprocessor sucessfully in youtube-dl. However, I realized that the postprocessors are also called on already existing files due to the success state "True":

self.report_file_already_downloaded(filename)
return True

and for my application it made more sense to mark already downloaded files as not successful to not make the transcoder work on that file again.

@ph03 commented on GitHub (Feb 22, 2011): B.t.w. yesterday I implemented my transcoder event as a postprocessor sucessfully in youtube-dl. However, I realized that the postprocessors are also called on already existing files due to the success state "True": self.report_file_already_downloaded(filename) return True and for my application it made more sense to mark already downloaded files as not successful to not make the transcoder work on that file again.

deekerman commented

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@dz0ny commented on GitHub (Feb 22, 2011):

Hi just quick thought how about

Post download action:
-C COMMAND, --command=COMMAND
command to run after file has been downloaded
(example: "sh -c cp /tmp/

@dz0ny commented on GitHub (Feb 22, 2011): Hi just quick thought how about Post download action: -C COMMAND, --command=COMMAND command to run after file has been downloaded (example: "sh -c cp <filepath> /tmp/<title>.tmp && rm <filepath>" ) or implement command chaining -T mp4 --transcode_extra ... -T mkv --transcode_extra ...

deekerman commented

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@dz0ny commented on GitHub (Feb 22, 2011):

Check https://github.com/dz0ny/youtube-dl

youtube-dl http://www.youtube.com/watch?v=BRHRssf3B6o -T mp4 -C "rm <filepath>"
[youtube] Setting language
[youtube] BRHRssf3B6o: Downloading video webpage
[youtube] BRHRssf3B6o: Downloading video info webpage
[youtube] BRHRssf3B6o: Extracting video information
[download] Destination: BRHRssf3B6o.flv
[download] 100.0% of 966.33k at  103.70k/s ETA 00:00 
[transcode] Started transcoding of BRHRssf3B6o.flv to BRHRssf3B6o.mp4
[transcode] Completed transcoding of BRHRssf3B6o.flv to BRHRssf3B6o.mp4
[PostProcessor] Started command rm BRHRssf3B6o.flv
[PostProcessor] Finnished command rm BRHRssf3B6o.flv

@dz0ny commented on GitHub (Feb 22, 2011): Check https://github.com/dz0ny/youtube-dl ``` youtube-dl http://www.youtube.com/watch?v=BRHRssf3B6o -T mp4 -C "rm <filepath>" [youtube] Setting language [youtube] BRHRssf3B6o: Downloading video webpage [youtube] BRHRssf3B6o: Downloading video info webpage [youtube] BRHRssf3B6o: Extracting video information [download] Destination: BRHRssf3B6o.flv [download] 100.0% of 966.33k at 103.70k/s ETA 00:00 [transcode] Started transcoding of BRHRssf3B6o.flv to BRHRssf3B6o.mp4 [transcode] Completed transcoding of BRHRssf3B6o.flv to BRHRssf3B6o.mp4 [PostProcessor] Started command rm BRHRssf3B6o.flv [PostProcessor] Finnished command rm BRHRssf3B6o.flv ```

deekerman commented