Warning codes - MediaConvert
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Warning codes

AWS Elemental MediaConvert returns warning codes when transcoding jobs run into problems that do not prevent the job from completing. You can use Amazon EventBridge to track the warning codes that the service returns. For more information, see Using EventBridge with AWS Elemental MediaConvert.

The following provides detailed information about warning codes and messages that MediaConvert returns, their possible causes, and solutions. To find information about a warning, you can quickly find the warning code using the following links. Details for each warning are available after the table.

Warning codes

100000 | 220000 | 230001 | 230002 | 230004 | 230005 | 230006 | 230007 | 230008 | 240000 | 240001 | 240003 | 250001 | 250002 | 250003 | 260000 | 270000

The following is a list of warning codes and troubleshooting steps:

100000 | Queue hop warning

What this means: Your job waited in its original submission queue for longer than the wait time that you specified, but it couldn't move to its new destination queue. This could be because the destination queue no longer exists or has been modified.

You control hop behavior, including Wait minutes and the Destination queue, under the Job management Queue hopping settings.

Recommended actions:

  • Check whether your destination queue still exists.

  • No immediate action is required, but your job might take longer than expected to complete.

For more information, see HopDestination in the API Reference.

Warning message:

Your job couldn't hop from its original submission queue to its destination queue.

220000 | Input incomplete warning

What this means: Your input file is missing data and your output's duration might be shorter than you expect.

Recommended actions:

  • Check your input for missing content.

  • Verify that your file was completely uploaded to Amazon S3.

  • Try re-uploading the file if necessary.

Warning message:

Your input file is truncated.

230001 | Input color metadata warning

What this means: MediaConvert could not follow your input's color space because your input has missing or incomplete color metadata. Color metadata includes color primaries, transfer function, and matrix coefficients.

Your output might have missing or inaccurate color metadata which can cause players to inaccurately display the video contents. If you specified Color space conversion in the output Color corrector, note that MediaConvert could not convert the color space and might have written inaccurate color metadata.

Recommended actions:

  • Manually specify your input's Color space and set Color space usage to Force.

  • Check your output for color accuracy issues.

For more information, see ColorSpace in the API Reference.

Warning message:

Your input's color metadata is missing or incomplete.

230002 | Audio duration correction warning

What this means: There is something wrong with the 'stts' time-to-sample table in your input file container's audio track, and MediaConvert can't apply audio duration correction.

Recommended actions:

  • Check your output for any audio video synchronization issues.

For more information about audio duration correction, see the API Reference.

Warning message:

MediaConvert can't apply audio duration correction to your input.

230004 | Input media header warning

What this means: The 'mdhd' media header atom in your input is incomplete or is missing data. MediaConvert expects the 'mdhd' atom to be 32 bytes or 20 bytes.

MediaConvert might not read your input correctly, which could affect the quality or accuracy of your output.

Recommended actions:

  • Check the accuracy and quality of your output, including the total file duration and any language codes.

Warning message:

Your input is missing information in its 'mdhd' media header atom.

230005 | Input color sample range warning

What this means: MediaConvert could not follow your input's color sample range because your input has missing or incomplete color sample range metadata.

Your output might have missing or inaccurate color sample range metadata which can cause players to inaccurately display the video contents. If you specified Color space conversion or Sample range conversion in the output Color corrector, note that your output's sample range might be inaccurate.

Recommended actions:

  • Manually specify your input's Sample range.

  • Check your output for color accuracy issues.

For more information, see SampleRange in the API Reference.

Warning message:

MediaConvert can't find color sample range metadata in your input.

230006 | Input audio warning

What this means: There's something wrong with your input's file structure or audio stream. The file might be corrupted or use non-standard encoding settings.

Your output might be missing audio content that MediaConvert couldn't decode.

Recommended actions:

  • Check your input for corruption or other audio encoding issues.

  • Verify that your output contains all expected audio content.

Warning message:

MediaConvert can't decode a portion of your input audio.

230007 | Input fragmented MP4 warning

What this means: When your input is a fragmented MP4, each MOOF fragment (Movie Fragment Box) should increment sequentially. Your input has fragments that are out of order, which might cause playback issues.

Recommended actions:

  • Check your output for any discontinuities or playback issues.

Warning message:

Your fragmented MP4 input has MOOF fragments that are out of order.

230008 | Input MP4 decode warning

What this means: Your MP4 input might have corrupt NAL units in the AVC1 atom, and MediaConvert couldn't decode all of the video stream.

Recommended actions:

  • Check your video output for issues, including problems with color, missing scene information, or gray frames.

Warning message:

MediaConvert can't decode a portion of your MP4 input's video stream.

240000 | Output audio silence warning

What this means: Your input audio track has missing, corrupt, or unexpected data. MediaConvert had to add silence to maintain proper synchronization.

Recommended actions:

  • Check your output for any audio video synchronization issues.

  • Verify that the audio quality meets your expectations.

Warning message:

MediaConvert added at least 100 milliseconds of audio silence to keep audio and video in sync.

240001 | Output dropped audio warning

What this means: Your input audio and video tracks were not properly synchronized. MediaConvert had to remove some audio content to maintain proper synchronization.

Recommended actions:

  • Check your output for any audio video synchronization issues.

  • Verify that no important audio content was lost.

Warning message:

MediaConvert dropped at least 100 milliseconds of audio to align audio and video.

240003 | Output HDR10+ limited range warning

What this means: You specified a full range HDR10+ output, but MediaConvert could only write it with a limited range because of technical constraints.

Recommended actions:

  • Specify how MediaConvert converts the color sample range by using the Color corrector preprocessor. Set Sample range conversion to Limited range squeeze or Limited range clip.

  • Check your output for any color accuracy issues.

Warning message:

MediaConvert converted your full range input into a limited range HDR10+ output.

250001 | Input caption font warning

What this means: You submitted an input caption with a font that MediaConvert doesn't support. MediaConvert will use a generic font instead.

Recommended actions:

  • Check your output captions to ensure they display correctly with the generic font.

  • If font appearance is critical, consider modifying your input captions to use a supported font.

Warning message:

Your input captions have an unsupported font.

250002 | Input Dolby CBI bitrate warning

What this means: You submitted a Dolby CBI input with a bitrate that MediaConvert doesn't support. MediaConvert will automatically increase it to a supported bitrate.

Recommended actions:

  • Check that the application generating your DOLBY CBI input is current and up to date.

  • Verify that the audio quality in your output meets your expectations.

Warning message:

Your Dolby CBI input has an unsupported bitrate.

250003 | Output Saliency aware encoding warning

What this means: MediaConvert only applies Saliency aware encoding to outputs that are 720p or higher in resolution that use Single Pass HQ or Multi Pass HQ Quality tuning levels.

Use Saliency aware encoding to improve the perceptual video quality of your output by allocating more encoding bits to the prominent or noticeable parts of your content. You might receive this warning message for jobs that specify Saliency aware encoding within an Automated ABR output, or for jobs that use certain Presets or Templates.

Note that this warning is informational only, and no action is required if the output quality meets your needs.

Recommended actions:

  • Ensure your outputs are 720p or higher in resolution.

  • Use Single Pass HQ or Multi Pass HQ Quality tuning levels.

Warning message:

MediaConvert can't apply Saliency aware encoding to one or more of your outputs.

260000 | Video decoder buffer underflow warning

What this means: The bitrate you specified for your output transport stream container is too low. It's less than the combined maximum bitrate of all output streams. This causes video decoder buffer underflow.

Recommended actions:

  • Increase the container's bitrate to accommodate all the streams within it.

  • Alternatively, decrease the bitrate for the video, audio, and data streams.

  • Consider enabling the "Prevent buffer underflow" setting, although this can result in reduced output video quality whenever MediaConvert prevents decoder buffer underflows.

Warning message:

Your output transport stream exceeded the bitrate that you specified.

270000 | Amazon S3 throttle warning

What this means: While MediaConvert was writing your output files to your destination bucket, it was throttled by Amazon S3. This happens when you exceed your request rate limit to Amazon S3.

Recommended actions:

  • Check for any other applications that are making simultaneous requests to the same Amazon S3 bucket and consider limiting them.

  • Your job might stall or take longer than expected to complete, but no immediate action is required.

  • For frequent issues, consider contacting Amazon Web Services Support about increasing your Amazon S3 request rate limits.

For more information, see Troubleshooting Amazon S3.

Warning message:

MediaConvert received a 503 Slow Down error code from Amazon S3 while writing your output to your destination bucket.