RMVB to FLAC Converter

Extract lossless FLAC audio from RealMedia RMVB video

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Settings

Set the number of audio channels. This setting is most useful when downmixing channels (e.g., from 5.1 to stereo).
Set the sample rate of the audio. Music with a full spectrum (20 Hz — 20 kHz) requires values not lower than 44.1 kHz to achieve transparency. More info can be found on the wiki.
Adjust the audio volume by selecting a number of decibels. For example, -10 dB decreases the volume by 10 decibels.

rmvb

RMVB (RealMedia Variable Bitrate) is an enhanced version of the RealMedia container format developed by RealNetworks, introduced around 2003. While the original RM format used constant bit rate encoding, RMVB employs variable bit rate compression that dynamically allocates more data to complex scenes with high motion and detail, and fewer bits to simpler passages like static shots or fade transitions. This approach yields significantly better visual quality at equivalent average file sizes compared to the constant bit rate predecessor. RMVB gained particular popularity in East and Southeast Asian markets during the mid-2000s, becoming a widely used format for distributing full-length movies and television content in regions where bandwidth was limited but viewers still demanded reasonable picture quality. The format typically uses RealVideo 9 or RealVideo 10 codecs, which drew on technologies comparable to H.264 in their compression approach. RMVB files support embedded subtitle streams and multiple audio tracks, making them practical for multilingual content distribution. The container retains the streaming-friendly architecture of RealMedia while delivering the quality improvements that variable bit rate encoding provides. Although RMVB has been superseded by MP4 with H.264 and other modern formats for most purposes, it retains a user base in Asian markets and can still be found in online media archives and personal video collections from the mid-2000s era.
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flac

FLAC (Free Lossless Audio Codec) delivers mathematically perfect audio reproduction at roughly half the size of an uncompressed WAV file. Maintained by the Xiph.Org Foundation and released in 2001, it quickly became the de facto open standard for lossless music archival. The encoder applies linear prediction to model each audio block, then codes the residual through Rice partitioning — exploiting the statistical distribution of prediction errors for strong compression without discarding data. Bit depths up to 32 and sample rates up to 655 kHz are supported, exceeding the requirements of high-resolution recordings. Hardware support is extensive: smartphones, car stereos, Blu-ray players, and virtually every desktop media application decode FLAC natively. Streaming services such as Tidal and Amazon Music use FLAC for lossless tiers, underscoring industry trust in the codec. Three standout benefits make FLAC compelling. First, complete bit-for-bit restoration of the original signal upon decoding. Second, embedded metadata via Vorbis comments and album art keeps libraries organized without sidecar files. Third, open-source licensing means no patents or royalties, removing legal friction for developers and hardware vendors.
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Lossless Quality

FLAC preserves every detail of RMVB audio — bit-perfect for permanent archiving.

Server Extraction

Processing runs remotely — your device stays free while lossless audio is extracted.

Wide Support

FLAC plays on Android, desktops, and network streamers — lossless audio anywhere.

How to convert RMVB to FLAC

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose flac or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your flac file right afterwards

About formats

RMVB (RealMedia Variable Bitrate) is an enhanced version of the RealMedia container format developed by RealNetworks, introduced around 2003. While the original RM format used constant bit rate encoding, RMVB employs variable bit rate compression that dynamically allocates more data to complex scenes with high motion and detail, and fewer bits to simpler passages like static shots or fade transitions. This approach yields significantly better visual quality at equivalent average file sizes compared to the constant bit rate predecessor. RMVB gained particular popularity in East and Southeast Asian markets during the mid-2000s, becoming a widely used format for distributing full-length movies and television content in regions where bandwidth was limited but viewers still demanded reasonable picture quality. The format typically uses RealVideo 9 or RealVideo 10 codecs, which drew on technologies comparable to H.264 in their compression approach. RMVB files support embedded subtitle streams and multiple audio tracks, making them practical for multilingual content distribution. The container retains the streaming-friendly architecture of RealMedia while delivering the quality improvements that variable bit rate encoding provides. Although RMVB has been superseded by MP4 with H.264 and other modern formats for most purposes, it retains a user base in Asian markets and can still be found in online media archives and personal video collections from the mid-2000s era.
Developer: RealNetworks
Initial release: 2003
FLAC (Free Lossless Audio Codec) delivers mathematically perfect audio reproduction at roughly half the size of an uncompressed WAV file. Maintained by the Xiph.Org Foundation and released in 2001, it quickly became the de facto open standard for lossless music archival. The encoder applies linear prediction to model each audio block, then codes the residual through Rice partitioning — exploiting the statistical distribution of prediction errors for strong compression without discarding data. Bit depths up to 32 and sample rates up to 655 kHz are supported, exceeding the requirements of high-resolution recordings. Hardware support is extensive: smartphones, car stereos, Blu-ray players, and virtually every desktop media application decode FLAC natively. Streaming services such as Tidal and Amazon Music use FLAC for lossless tiers, underscoring industry trust in the codec. Three standout benefits make FLAC compelling. First, complete bit-for-bit restoration of the original signal upon decoding. Second, embedded metadata via Vorbis comments and album art keeps libraries organized without sidecar files. Third, open-source licensing means no patents or royalties, removing legal friction for developers and hardware vendors.
Initial release: July 20, 2001

Frequently Asked Questions

Why convert RMVB to FLAC?

FLAC preserves every audio detail without compression loss — ideal for archiving soundtracks, interviews, or music extracted from RealMedia video files.

What programs play FLAC files?

VLC, foobar2000, most Android music players, and many car stereos support FLAC natively. Apple devices play FLAC through the built-in Files app.

Will audio quality match the original RMVB track?

FLAC is lossless, so the full quality of the RMVB audio track is preserved. The only limit is the original encoding quality inside the RMVB.

Can I extract FLAC from multiple RMVB videos at once?

Yes — batch extraction is supported. Upload several RMVB files and each audio track will be extracted and encoded as a separate FLAC file.

How does Convertio protect my RMVB uploads?

RMVB uploads are deleted from servers immediately after extraction completes. FLAC output files are automatically purged within 24 hours.