Step 1: Upload your FLV 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 AIFF files.
FLV to AIFF Conversion FAQ
How do I extract audio from a FLV video as AIFF?
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Upload your FLV video. PDF.to pulls the audio track out, encodes it to AIFF, and gives you a AIFF-only download. The video stream is discarded.
Will the audio in the AIFF match the original FLV quality?
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If the source audio is already in a codec compatible with AIFF, 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 AIFF 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 FLV as AIFF?
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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 AIFF.
Does the converter handle FLV files with multiple audio tracks?
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Yes. If your FLV has several language or commentary tracks, you can pick which one(s) to extract as AIFF in the options panel.
Will the AIFF 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 FLV to AIFF extraction free?
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Yes for files under 100 MB. PRO supports larger FLV files (5 GB) and parallel batch extraction.
Does PDF.to read or store my FLV content?
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No. The FLV video and the AIFF audio output are deleted within an hour. Conversion runs in an isolated worker.
Can I batch-extract audio from multiple FLV files?
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Yes — drop a folder of FLV videos and you will get a ZIP of AIFF files back, one per source video.
Will the AIFF preserve tags and metadata?
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Title, artist, and album tags are populated from the FLV 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 FLV legally first, then upload it for AIFF extraction.
Why is the AIFF file much smaller than the FLV video?
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Because the video stream (typically 90%+ of file size) is discarded. Only the audio track ends up in the AIFF, which is why it can drop from gigabytes to a few megabytes.