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lemondreas

Member

Registered: 2011-05-11

Posts: 32

[vivaldi-ffmpeg-codecs] preloaded libffmpeg.so breaks ffmpeg tasks

AUR Package: vivaldi-ffmpeg-codecs, also opera-ffmpeg-codecs

For weeks i'm playing arround with NativeMessaging in chrome-based
browser, as explained here:
https://developer.chrome.com/extensions/nativeMessaging

As host i use a python script, wich handles the messages, coming from
browser actions. In particular i want to send url of video sites, grab
the video file and convert by ffmpeg.

This works fine if i execute the script in terminal or by
NativeMessaging in chromium. But in vivaldi/opera only as long as
*-ffmpeg-codecs isn't installed.

As far as i understand, the *-ffmpeg-codecs packages provide
libffmpeg.so wich is LD_PRELOADed, so i think something is wrong with
the preloaded libffmpeg.so in the *-ffmpeg-codecs packages for vivaldi
and opera.

Here is the code from Python host:

cmd = ['/usr/bin/ffmpeg', '-y', '-i', '/home/user/Downloads/test.m4a',
'-c', 'copy', '-f', 'mp4', '/home/user/Downloads/test.temp.m4a']
p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE, stdin=subprocess.PIPE)

stdout, stderr = p.communicate()
if p.returncode != 0:
   msg = stderr.strip().split('\n')[-1]
   logging.error(msg)

The Output from logging.error():
ERROR:root:Did you mean file:/home/user/Downloads/test.m4a?

Same goes for tasks with ffprobe:

ffprobe -show_streams 'file:/home/user/Downloads/test.webm'
ERROR:root: WARNING: unable to obtain file audio codec with ffprobe

Is this a bug?
Why is chromium doing well but vivaldi/opera not?
Is there a workarround to ignore LD_PRELOAD for ffmpeg tasks?

I tried it already in the vivaldi forum and they send me here.
https://forum.vivaldi.net/topic/17134/p … strange/17

opera-developer-ffmpeg-codecs and vivaldi-snapshot-ffmpeg-codecs are also tested.

Last edited by lemondreas (2017-06-04 15:31:30)

lemondreas

Member

Registered: 2011-05-11

Posts: 32

Re: [vivaldi-ffmpeg-codecs] preloaded libffmpeg.so breaks ffmpeg tasks

Big Thanks to BlackIkeEagle, who helped me in getting a workarround:

    if 'LD_PRELOAD' in os.environ:
        del os.environ['LD_PRELOAD']

btw:
here ist my project
https://github.com/le-mon/vid2mp3

Last edited by lemondreas (2017-06-06 20:41:29)