Step 1: Upload your VOB files using the button above or by drag and drop.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Download your converted AMR files.
VOB to AMR Conversion FAQ
How do I extract audio from a VOB video as AMR?
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Upload your VOB video. PDF.to pulls the audio track out, encodes it to AMR, and gives you a AMR-only download. The video stream is discarded.
Will the audio in the AMR match the original VOB quality?
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If the source audio is already in a codec compatible with AMR, we stream-copy without re-encoding — bit-identical to the original. Otherwise we re-encode at 192 kbps by default for near-transparent quality.
What bitrate is the AMR output?
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192 kbps by default. The options panel exposes 96, 128, 192, 256, and 320 kbps — pick higher for music, lower for voice.
Can I extract only part of the VOB as AMR?
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Yes. Use the trim controls on the upload preview to set start and end times before extracting, and only that range becomes AMR.
Does the converter handle VOB files with multiple audio tracks?
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Yes. If your VOB has several language or commentary tracks, you can pick which one(s) to extract as AMR in the options panel.
Will the AMR output have the same sample rate as the source?
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Yes by default. We do not resample unless you explicitly request it. 48 kHz is preserved from movie sources, 44.1 kHz from music sources.
Is the VOB to AMR extraction free?
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Yes for files under 100 MB. PRO supports larger VOB files (5 GB) and parallel batch extraction.
Does PDF.to read or store my VOB content?
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No. The VOB video and the AMR audio output are deleted within an hour. Conversion runs in an isolated worker.
Can I batch-extract audio from multiple VOB files?
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Yes — drop a folder of VOB videos and you will get a ZIP of AMR files back, one per source video.
Will the AMR preserve tags and metadata?
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Title, artist, and album tags are populated from the VOB container metadata when available. You can edit them after extraction with our audio-tag tool.
Does the converter work on streaming video URLs?
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No — PDF.to converts files you upload, not third-party stream URLs. Download the VOB legally first, then upload it for AMR extraction.
Why is the AMR file much smaller than the VOB video?
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Because the video stream (typically 90%+ of file size) is discarded. Only the audio track ends up in the AMR, which is why it can drop from gigabytes to a few megabytes.