FLAC support (for video)

[Former user]

Many BD-remuxes and rips over the internet comes in MKV container with FLAC tracks. It would be nice to allow target audio codec FLAC for video transcoding.

[Petr Nejedly]

please post ffmpeg -i of a file like that

[Former user]

[matroska,webm @ 015fcf70] max_analyze_duration reached [matroska,webm @ 015fcf70] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 1000.00 (1000/1) Input #0, matroska,webm, from 'c:\sample.mkv': Metadata: title : Kara no Kyoukai - Cinema Intro 7 Duration: 00:01:23.12, start: 0.000000, bitrate: N/A Stream #0.0(jpn): Video: h264, yuv420p, 1920x1080, PAR 1:1 DAR 16:9, 23.97 fps, 1k tbr, 1k tbn, 180k tbc Metadata: title : H.264 Stream #0.1(jpn): Audio: flac, 48000 Hz, 6 channels, s32 Metadata: title : FLAC 5.1 Stream #0.2(eng): Subtitle: ass Metadata: title : Styled Subs Stream #0.3: Attachment: [0][0][0][0] / 0x0000 Metadata: filename : Another.ttf At least one output file must be specified

Also, you can download this file

http://dl.dropbox.com/u/2487793/incoming/sample.mkv

or

http://blame.org.ua/sample.mkv

[Former user]

[matroska,webm @ 015fcf70] max_analyze_duration reached
[matroska,webm @ 015fcf70] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 1000.00 (1000/1)
Input #0, matroska,webm, from 'c:\sample.mkv':
  Metadata:
    title           : Kara no Kyoukai - Cinema Intro 7
  Duration: 00:01:23.12, start: 0.000000, bitrate: N/A
    Stream #0.0(jpn): Video: h264, yuv420p, 1920x1080, PAR 1:1 DAR 16:9, 23.97 fps, 1k tbr, 1k tbn, 180k tbc
    Metadata:
      title           : H.264
    Stream #0.1(jpn): Audio: flac, 48000 Hz, 6 channels, s32
    Metadata:
      title           : FLAC 5.1
    Stream #0.2(eng): Subtitle: ass
    Metadata:
      title           : Styled Subs
    Stream #0.3: Attachment: [0][0][0][0] / 0x0000
    Metadata:
      filename        : Another.ttf
At least one output file must be specified

Also, you can download this file

http://dl.dropbox.com/u/2487793/incoming/sample.mkv

or

http://blame.org.ua/sample.mkv

P.S.: in previous post was problem with formatting, so I reposted.

[Former user]

Also, pay atention - ffmpeg not showing this, but FLAC track is 24bit. This is also quite a common practice. And if I remember right then downsampling to 16bit needed.

[Petr Nejedly]

didn't do anything about bit rate, they all seem to work on my Samsung. One thing that doesn't work it high rate FLAC audio (e.g. 96k) - it cannot be resampled to 48k as FFmpeg doesn't support it and AC3 allows max 48k so the stream cannot be transcoded to AC3@96k. Tried AAC as the target container but FFmpeg is having issues with aac encoder, maybe they'll enhance it in future -> then it's just the matter of updating profiles.xml to transcode to aac.

[Former user]

Ok, then we'll have to wait for the ffmpeg fix. I'll try to test it myself later, it's kinda interesting.