View Issue Details

IDCategoryLast Update
0006960bugs2016-08-17 22:43
ReporterSadKoAssigned To 
Reproducibilityalways 
Status newResolutionopen 
Platformx86_64OSopenSUSE LinuxOS Version13.2
Product Version5.0-pre 
Fixed in Version 
Summary0006960: Ardour export invalid time in output container
DescriptionWhen exporting files larger than 4GB in format WAV, FLOAT, 48kHz (about 3-4 hours), the output time is trimmed.
Steps To ReproduceI've exported large file:
stat lesson3.wav
  File: ‘lesson3.wav’
  Size: 4546176088 Blocks: 8879264 IO Block: 4096 regular file
Device: 97fh/2431d Inode: 191103844 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ sadko) Gid: ( 100/ users)
Access: 2016-08-17 21:22:27.002244136 +0300
Modify: 2016-08-17 21:46:35.978958037 +0300
Change: 2016-08-17 21:46:35.978958037 +0300
 Birth: -

The ffprobe report:

Input #0, wav, from 'lesson3.wav':
  Duration: 00:10:54.19, bitrate: 55594 kb/s
    Stream #0:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 48000 Hz, 2 channels, flt, 3072 kb/s

All other player also see only 11 minutes of playback

The first 8Kbytes of the file with RIFF header is in attachment.
TagsNo tags attached.

Activities

SadKo

2016-08-17 19:11

reporter  

lesson3-hdr.wav (8,192 bytes)

x42

2016-08-17 19:40

administrator   ~0018386

That is a limitation of the wav file format.
https://en.wikipedia.org/wiki/WAV#Limitations

use w64 or some other capable supported format

SadKo

2016-08-17 20:46

reporter   ~0018387

Maybe it would be good to add warning/split file into sequence of two files?

paul

2016-08-17 22:43

administrator   ~0018388

We offer RF64 (Wave Compatible) format for users working with potentially long recordings or large files. This format stays compatible with WAV up to the size limit of WAV, then converts the file into RF64, which can be enormously bigger.

Unfortunately, we only offer this for audio data captured by Ardour, not during export.

I agree that Ardour should at least warn you that the data to be exported is too big for WAV format. Please file a separate bug for that.

paul

2016-08-17 22:43

administrator   ~0018389

Actually, don't worry about filing another bug report.

Issue History

Date Modified Username Field Change
2016-08-17 19:11 SadKo New Issue
2016-08-17 19:11 SadKo File Added: lesson3-hdr.wav
2016-08-17 19:40 x42 Note Added: 0018386
2016-08-17 20:46 SadKo Note Added: 0018387
2016-08-17 22:43 paul Note Added: 0018388
2016-08-17 22:43 paul Note Added: 0018389