Opened 13 years ago
Last modified 9 years ago
#357 open enhancement
Trying to transcode a vbk file to wav
| Reported by: | himanshu | Owned by: | Michael Niedermayer |
|---|---|---|---|
| Priority: | wish | Component: | undetermined |
| Version: | git-master | Keywords: | VBK |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
Hi Team,
I was trying to transcode a vbk file to a wav file. But I encoutered an error log pasted below. Also I verified that the file is not corrupt by playing the same in CallPilot Player and it plays fine.
C:\Users\himanshu.bhardwaj\Desktop\FFMpegTest>ffmpeg -y -i C:\Users\himanshu.bhardwaj\Desktop\FFMpegTest\v060102.vbk -acodec pcm_mulaw C:\Users\himanshu.bhardwaj\Desktop\FFMpegTest\output.wav
ffmpeg version N-31548-g78accb8, Copyright (c) 2000-2011 the FFmpeg developers built on Jul 17 2011 22:41:27 with gcc 4.6.1 configuration: --enable-gpl --enable-version3 --enable-memalign-hack --enable- runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 51. 11. 0 / 51. 11. 0
libavcodec 53. 8. 0 / 53. 8. 0
libavformat 53. 6. 0 / 53. 6. 0
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 27. 0 / 2. 27. 0
libswscale 2. 0. 0 / 2. 0. 0
libpostproc 51. 2. 0 / 51. 2. 0
C:\Users\himanshu.bhardwaj\Desktop\FFMpegTest\v060102.vbk: Invalid data found when processing input
Attachments (2)
Change History (13)
by , 13 years ago
| Attachment: | v060102.vbk added |
|---|
comment:2 by , 13 years ago
| Component: | FFmpeg → undetermined |
|---|---|
| Keywords: | WAV removed |
| Priority: | normal → wish |
| Reproduced by developer: | set |
| Status: | new → open |
| Type: | defect → enhancement |
| Version: | unspecified → git-master |
Is the Nortel CallPilot able to convert the vbk file to wav? If yes, could you upload the wav file?
comment:6 by , 13 years ago
I am very new to media processing.
So what I understand from the last statement is that, I would be needing a voice codec which supports 17 kbps. This needs to be integrated in ffmpeg which can do the processing then.
comment:8 by , 13 years ago
So far, we don't even have information about what voice codec is used in a vbk file, so a fix is currently unlikely.
If it really is similar to G.726 or G.728 (the bitrate suggests this) it may not be impossible though.
There is some indication somebody would be able to share the necessary information about the codec:
https://www.odesk.com/jobs/Reverse-Engineer-Nortel-VBK-Audio-Format_~~f501f11679f3f6bb
follow-up: 10 comment:9 by , 9 years ago
Without dlls and exe of reference implementation there is no way this will ever be fixed.
comment:10 by , 9 years ago
Replying to richardpl:
Without dlls and exe of reference implementation there is no way this will ever be fixed.
You don't think audio is G.728?
Sample file used for testing