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What is SRT?

SubRip (SRT) is the most widely used subtitle format, containing text with start and end timestamps for synchronizing with video.

What is MP4?

MP4 (MPEG-4 Part 14) is the industry standard video format, offering excellent quality at reasonable file sizes for web and mobile playback.

When Should You Use SRT vs MP4?

Use SRT When...

Reach for SRT when your priority is video subtitles, captioning, translation — its uncompromising quality ensures every detail is preserved.

Use MP4 When...

Reach for MP4 when your priority is streaming, mobile video, online platforms — its efficient compression makes sharing fast and storage minimal.

SRT vs MP4: Key Differences

  • •SRT and MP4 diverge on compression: lossless compression for the source, lossy compression for the target.
  • •Converting from SRT to MP4 changes compression type: lossy source becomes smaller but with some quality tradeoff.
  • •How transparency is handled: MP4 does not support alpha channels — transparent areas in the source will become opaque.
  • •SRT files are typically Very small, under 100KB per movie while MP4 files range 1MB/min (720p) to 10MB/min (4K)
  • •SRT is optimized for video subtitles, captioning, translation while MP4 is designed for streaming, mobile video, online platforms — choose based on your specific workflow needs

Advantages of SRT

  • ✓SRT applies lossless compression specifically calibrated for Video subtitles, captioning, translation.
  • ✓SRT enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓SRT guarantees every bit of the original data survives — no approximations, no shortcuts.
  • ✓You will find SRT support built into virtually every tool that handles Video subtitles, captioning, translation — no plugins or converters needed.

Advantages of MP4

  • ✓MP4 applies lossy compression specifically calibrated for Streaming, mobile video, online platforms.
  • ✓MP4 enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓MP4 delivers impressive compression ratios, shrinking files dramatically while keeping visual quality high.
  • ✓You will find MP4 support built into virtually every tool that handles Streaming, mobile video, online platforms — no plugins or converters needed.

Common Use Cases for SRT to MP4 Conversion

  • Broadcast production
  • Video game cutscenes
  • Product demonstrations
  • Webinar recordings
  • Animated explainers
  • Video resumes

Industry Applications

Video SurveillanceGamingLive EventsVideo ConferencingDigital SignageSports Analytics

Best Practices for SRT to MP4 Conversion

  • →Converting SRT to MP4: match the output resolution and bitrate to your target platform's requirements
  • →MP4 provides broad compatibility across devices and platforms
  • →Use appropriate bitrate for the balance of quality and file size
  • →MP4 is a lossy format, so expect some quality loss at higher compression ratios
  • →Always keep a backup of your original files before converting
  • →Choose the appropriate quality settings for your specific use case

Related Article

Video Compression Guide: Reduce File Size Without Losing Quality

Learn more about SRT and MP4 formats in our detailed guide.

Troubleshooting SRT to MP4 Conversion

  • !Video stutters during playback of MP4 → the frame rate may need adjustment; matching the source frame rate avoids judder
  • !Black bars appear around the converted MP4 → check aspect ratio and cropping settings before re-encoding
  • !Subtitles vanished after SRT to MP4 conversion → some containers handle subtitle tracks in separate streams
  • !MP4 file won't upload to a streaming platform → verify the format, codec, and bitrate comply with the platform's specifications

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Convert SRT to MP4 Online - Free & Fast

Convert SRT files to MP4 online for free. High-quality conversion with no registration required.

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About SRT and MP4

SRT

SRT (SRT subtitles) - SubRip subtitle, plain-text subtitle format with timestamps. Best for video subtitles, captioning, translation.

MP4

MP4 (MP4 videos) - Industry standard video format optimized for web and mobile. Ideal for streaming, mobile video, online platforms.

Format Comparison

CompressionLossless → Lossy
TransparencyN/A
Use CaseConvert from video subtitles, captioning, translation to streaming, mobile video, online platforms
File Size~1MB/min (720p) to 10MB/min (4K) after conversion

FAQs

Is converting SRT to MP4 free?

Yes, GoConvertFile offers free conversion of SRT to MP4 for files up to 100MB. No registration required.

How long does it take to convert SRT to MP4?

Most SRT to MP4 conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is MP4 best used for?

MP4 is ideal for streaming, mobile video, online platforms. Industry standard video format optimized for web and mobile

Does converting SRT to MP4 lose quality?

Yes, converting SRT to MP4 uses lossy compression, which reduces file size by discarding some visual data. Set quality to 85-95% for a good balance of quality and file size.

What file size should I expect after converting SRT to MP4?

MP4 files are typically 50-80% smaller than SRT files because MP4 uses efficient lossy compression. The exact reduction depends on quality settings.

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Tune output for this video conversion
80%
Smaller fileBetter quality