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What is RM?

RealMedia (RM) is a RealNetworks container format for streaming audio/video over the internet with adaptive bitrate.

What is HEVC?

Raw H.265/HEVC is an elementary stream of High Efficiency Video Coding data, doubling compression efficiency over H.264.

When Should You Use RM vs HEVC?

Use RM When...

Reach for RM when your priority is legacy streaming, realplayer content — its efficient compression makes sharing fast and storage minimal.

Use HEVC When...

Reach for HEVC when your priority is high-efficiency video encoding, 4k/8k streams — its efficient compression makes sharing fast and storage minimal.

RM vs HEVC: Key Differences

  • •The core technical difference: RM relies on lossy compression whereas HEVC uses lossy compression.
  • •Both formats share lossy compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
  • •How transparency is handled: HEVC does not support alpha channels — transparent areas in the source will become opaque.
  • •File sizes: RM files typically range Small, optimized for dial-up streaming and HEVC files 50% smaller than H.264 at same quality.
  • •RM is optimized for legacy streaming, realplayer content while HEVC is designed for high-efficiency video encoding, 4k/8k streams — choose based on your specific workflow needs

Advantages of RM

  • ✓The lossy nature of RM means file sizes stay reasonable while handling Legacy streaming, RealPlayer content efficiently.
  • ✓From mobile devices to enterprise servers, RM is recognized and supported everywhere.
  • ✓Storage and bandwidth costs drop significantly when using RM thanks to its efficient compression.
  • ✓RM is a first-class citizen in all major software ecosystems, from creative suites to development environments.

Advantages of HEVC

  • ✓HEVC applies lossy compression specifically calibrated for High-efficiency video encoding, 4K/8K streams.
  • ✓HEVC enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓HEVC delivers impressive compression ratios, shrinking files dramatically while keeping visual quality high.
  • ✓You will find HEVC support built into virtually every tool that handles High-efficiency video encoding, 4K/8K streams — no plugins or converters needed.

Common Use Cases for RM to HEVC Conversion

  • Educational content
  • Marketing videos
  • Video archiving
  • Broadcast production
  • Video game cutscenes
  • Product demonstrations

Industry Applications

E-learningMarketingBroadcast MediaVideo SurveillanceGamingLive Events

Best Practices for RM to HEVC Conversion

  • →For RM to HEVC: encode at the target platform's native resolution — upscaling or downscaling adds unnecessary artifacts
  • →Test a short clip before converting the entire RM file — this confirms HEVC settings produce acceptable quality
  • →HEVC uses modern codecs that deliver great quality at lower bitrates — take advantage of this during conversion
  • →Use constant bitrate (CBR) for streaming delivery and variable bitrate (VBR) for archival storage
  • →Keep the original file in case you need to re-encode with different settings
  • →Check audio sync after conversion — container changes can sometimes cause drift

Related Article

Video Compression Guide: Reduce File Size Without Losing Quality

Learn more about RM and HEVC formats in our detailed guide.

Troubleshooting RM to HEVC Conversion

  • !HEVC won't play on target device → check codec compatibility (H.264 has broadest support)
  • !Audio out of sync after RM to HEVC conversion → try re-muxing with a different container format
  • !HEVC quality is too low → increase the bitrate; for 1080p video, 8-15 Mbps is recommended
  • !File size increased converting RM to HEVC → lossless or higher-bitrate outputs naturally produce larger files

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About RM and HEVC

RM

RM (RealMedia RM) - RealMedia, RealNetworks streaming video format. Best for legacy streaming, realplayer content.

HEVC

HEVC (HEVC streams) - Raw H.265/HEVC, elementary stream of HEVC encoded video. Ideal for high-efficiency video encoding, 4k/8k streams.

Format Comparison

CompressionLossy → Lossy
TransparencyN/A
Use CaseConvert from legacy streaming, realplayer content to high-efficiency video encoding, 4k/8k streams
File Size~50% smaller than H.264 at same quality after conversion

FAQs

Is converting RM to HEVC free?

Yes, GoConvertFile offers free conversion of RM to HEVC for files up to 100MB. No registration required.

How long does it take to convert RM to HEVC?

Most RM to HEVC conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is HEVC best used for?

HEVC is ideal for high-efficiency video encoding, 4k/8k streams. Raw H.265/HEVC, elementary stream of HEVC encoded video

What file size should I expect after converting RM to HEVC?

File size after RM to HEVC conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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Tune output for this video conversion
80%
Smaller fileBetter quality