FLAC Support

[Thangalin]

Wish list: FLAC audio file support.

[Olivier Girard (eolinwen)]

Done.but i don't know if Ffmpeg manage it. And i think (and nearly sure ) that Transcode can 't do it too.

[Andy Finch (fincha)]

FLAC files play ok in melt, but get imported as an image file type in Openshot.

[Andy Finch (fincha)]

I've found a way (via MLT) to improve the methods we use to identify the file type, which results in FLAC files being imported properly (the new method also allows us to get extra information about the files, so we can provide more info about the file).

This will have to wait a while though, as we're in the final stages of the 1.3 release.

[Thangalin (thangalin-deactivatedaccount)]

Looking forward to it, Andy.

Thank you!

[Jonathan Thomas (jonoomph)]

It looks like MLT and even FFmpeg identify the FLAC format as having no length. So, even if we can get the file identified correctly, it will probably still crash OpenShot when it thinks it's a longer file than it really is. I know Kdenlive also suffers from this bug.

[Andy Finch (fincha)]

Additional code in thumbnail.py such as the below (indentation will probably get lost), will allow flac files to be imported properly. I haven't submitted it as a patch yet, as I wanted to spend more time testing it all out, but it seems to work.

 audio_index = self.p.get_int("audio_index")
    video_index = self.p.get_int("video_index")
    audio_property = "meta.media.%s.codec.long_name" % audio_index
    if self.p.get(audio_property):
     audio_codec = self.p.get(audio_property)
    else:
     audio_codec = ""

    video_property = "meta.media.%s.codec.long_name" % video_index
    if self.p.get(video_property):
     video_codec = self.p.get(video_property)
     print self.p.get("meta.media.colorspace")
    else:
     video_codec = ""

    if self.p.get_frame():
     frame = self.p.get_frame()
     frequency = frame.get_int("frequency")
     channels = frame.get_int("channels")

    # determine if this is an image
    is_image = False
    if self.p.get_length() == 15000 and video_index == 0 and audio_index == 0:
     # images always have exactly 15000 frames
                                is_image = True
     self.file_type = "image"

[Andy Finch (fincha)]

Essentially, images files should have audio_index & video_index = 0, whereas one or other (or both) will be set to 1 for video/audio files.

[moimael (moimael)]

Is it fixed in 1.4 master ?

[Andy Finch (fincha)]

It's not, I need to look at it again, I think there might have been some file length issues.

[Andy Finch (fincha)]

This is now added to the trunk. You cannot seek within the file, this seems to be a ffmpeg limitation, but Openshot will now import them properly with the correct file length and play them on the timeline.