Step 1: Provide your AVI files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted FLAC files.
AVI to FLAC Conversion FAQ
How do I extract just the audio track from AVI as FLAC?
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Upload the AVI file and the converter demuxes the audio stream from the AVI container, then transcodes it into FLAC. Video frames are discarded — no second video pass, no quality loss beyond what the FLAC codec itself introduces.
Which audio track gets extracted when my AVI has several?
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By default stream 0 (the first audio track, usually the main mix). If your AVI carries commentary, dubs, or descriptive audio on additional tracks, the advanced "audio stream" picker lets you pick 1, 2, 3... explicitly. The track list is shown in the upload preview so you do not pick blind.
What bitrate does the FLAC file use?
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Default FLAC bitrate is 192 kbps (transparent for music to most ears). Override to 320 kbps for audiophile output, or 96-128 kbps for voice / podcast where the smaller file is the priority. Lossless FLAC targets (WAV, FLAC) ignore the bitrate setting and keep every sample.
Will going from AVI to FLAC reduce my audio quality?
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If the FLAC format is lossless (WAV, FLAC, ALAC), every original sample is preserved. If FLAC is lossy (MP3, AAC, OGG, Opus), the codec recompresses — at 192 kbps the difference is inaudible for most content; at 96 kbps you may hear cymbals or sibilants softening. The AVI container has no influence on this — only the codec settings matter.
Does the extracted FLAC keep the AVI sample rate?
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By default yes — 48 kHz AVI audio becomes 48 kHz FLAC audio, 44.1 kHz becomes 44.1 kHz. If you need to downsample for compatibility (e.g. 96 kHz studio masters to 44.1 kHz CD-quality FLAC) the sample-rate dropdown does this with high-quality resampling.
Can I batch-extract FLAC audio from a folder of AVI files?
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Yes — drop a folder of AVI files into the upload zone and we run extraction in parallel. Premium gets more parallel workers; on a 100-file batch (typical music-video collection) this is the difference between 90 seconds and 8 minutes.
How long does extracting FLAC from a 1-hour AVI take?
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Audio demux + transcode runs much faster than video re-encoding — typically 5-15% of source duration. A 1-hour AVI -> FLAC finishes in 3-9 minutes on the standard pipeline. If the FLAC codec matches the source codec already in the AVI (common for AAC inside MKV / MP4), it is a pure remux and runs in seconds.
Will the FLAC file carry title / artist / album tags?
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If the AVI file stores stream metadata (artist, title, album), we copy those fields into the FLAC container where the format supports tags. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC / M4A), RIFF INFO (WAV) are all written. Untagged AVI produces untagged FLAC — use Mp3tag or Picard post-export to enrich.
Is my AVI private during audio extraction?
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Yes — same privacy model as every conversion. Source AVI and output FLAC are processed in isolated workers and deleted within minutes. We never play, store, or share content. See /privacy/.
Why does my FLAC have silent gaps or wrong audio?
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Almost always a stream-index mismatch — your AVI had a multi-track audio layout and we extracted the wrong stream (e.g. the silent descriptive audio track instead of the main mix). Re-run with the advanced "audio stream" option set to the right index, or pick "all streams" to extract every track as a separate FLAC file.
Can the FLAC extraction be stereo, mono, or 5.1?
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Channel layout follows the AVI by default: a 5.1 AVI audio stream produces a 5.1 FLAC where the codec supports it (AAC, FLAC, OGG, Opus). The channel-downmix option forces stereo or mono — useful for podcast workflow or compatibility with mono-only Bluetooth speakers.
Will the extracted FLAC play on iPhone / Android / car stereo?
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MP3 plays universally. AAC / M4A plays on Apple and most Android, including factory car stereos from 2014+. OGG / Opus needs a recent player and may not work in older infotainment systems. The advanced device-target dropdown picks the safest FLAC codec for the target you select.