VOB to AMR - Convert audio online
Conversion Results:
| # | Output File | Source File | Action |
|---|
How to convert VOB to AMR:
1. Click the "Choose Files" button to select multiple files from your local device, or click the "URL" button to choose an online file. The source file can also be video format. Video and audio file size can be up to 200M. You can use the file analyzer to get the source audio's detailed information such as track name, genre, bitrate, and sampling rate.
2. Set the target audio format, bitrate, and sample rate. The target audio format can be WAV, WMA, MP3, OGG, AAC, AU, FLAC, M4A, MKA, AIFF, OPUS, or RA.
3. Click the "Convert Now!" button to start batch conversion. It will automatically retry conversion on another server if one fails; please be patient while converting. The output files will be listed in the "Conversion Results" section. Click the icon to show the file QR code or save the file to cloud storage services such as Google Drive or Dropbox.
VOB vs AMR:
| Name | VOB | AMR |
| Full name | Video Object | Adaptive Multi-Rate |
| File extension | .vob | .amr, .3ga |
| MIME | video/dvd, video/x-ms-vob | audio/amr |
| Developed by | DVD Forum | 3GPP |
| Type of format | Media container | Audio compression format |
| Introduction | VOB (Video Object) is the container format in DVD-Video media. VOB can contain digital video, digital audio, subtitles, DVD menus and navigation contents multiplexed together into a stream form. Files in VOB format may be encrypted. | The Adaptive Multi-Rate (AMR or AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR was adopted as the standard speech codec by 3GPP in October 1999 and is now widely used in GSM and UMTS. |
| Technical details | Files in VOB format have a .vob filename extension and are typically stored in the VIDEO_TS directory at the root of a DVD. The VOB format is based on the MPEG program stream format, but with additional limitations and specifications in the private streams. VOB files may be accompanied with IFO and BUP files. These files respectively have .ifo and .bup filename extensions. | AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200-3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s. Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to 200-3400 Hz. |
| Associated programs | MPlayer, VLC media player, GOM player, Media Player Classic | Audacity, FFmpeg, MPlayer, QuickTime, VLC media player |
| Sample file | sample.vob | sample.amr |
| Wikipedia | VOB on Wikipedia | AMR on Wikipedia |