Common QC Fail Glossary¶
| Type | Label | Description |
|---|---|---|
| av | Abrupt Edit | an incomplete transitional effect or hard cut that is not creatively intended |
| av | Extraneous Content | contains intra-program bumpers, teaser or recap content etc |
| av | Truncation | an incomplete asset, where a portion of the program is missing from the head/tail of the asset. This results in an abrupt cut out before the end of program or a cut in after the true beginning of program |
| a | Abrupt Edit | abrupt signal drop off or incomplete transitional effect |
| a | Artifact | audible artifacts such as "ticks", "pops", "crackle", "hiss" etc |
| a | Channel Mismap | incorrect implementation of the audio track or audio channel order, which dictates the desired speaker assignment or channel arrangement of an audio mix |
| a | Drop Out | irregular interruption or lack of audio signal in an audio mix, channel or track |
| a | Mute | the complete lack of audio signal in an audio mix, channel or track |
| a | Level Shift/Change | any abrupt change of base or peak audio levels that could be considered unintentional |
| a | Mixdown Error | discrepancy stemming from the process of folding tracks from one/multiple mixes together to create a new mix (i.e. creating a stereo fold down from the 5.1 mix). This can result in overall levels or specific elements not matching between the mixes |
| a | Panning Error | incorrect balance between left and right channel pairs that does not match the on screen action. This can happen through a limited duration, or audio may favor one channel through the entire program |
| a | Phase Error | different recorded signal frequencies are identical but partially or completely inverted, effectively delaying or cancelling out certain elements of the mix |
| a | Skip | irregular interruption of audio signal in an audio mix, channel or track |
| a | Upcut | an audio edit that happens mid-dialogue, music and/or effect resulting in audio that does not match the rest of the scene in audible level/sound quality |
| a | Sync Drift | audio sync that drifts progressively earlier/later through a section or entire program |
| a | Sync Offset | audio across section or entire program that is out of sync (early or late) by a consistent amount of frames/seconds |
| a | Incorrect Language | an asset that was delivered with a dialogue language that does not match the expected language of the asset |
| a | Volume Flutter | rapid oscillation of volume in dialogue, music or effects |
| a | Dual Mono | the duplication of an audio track, effectively eliminating any stereo or surround panning |
| a | Dialogue Out of Sync | lip movement that does not match on screen performance |
| a | Effects Out of Sync | refers to sound effect timing that does not match on screen coincidence |
| a | Extraneous Content | additional, unnecessary audio is included with program. This may be large sections of silence before or after program, 2 pops, and other extraneous dialogue, music or effects |
| a | Low Level | audio tracks or segments peaking at dramatically low levels |
| v | Visible VITC | lines that are typically inserted into the vertical blanking interval of the video signal |
| v | Aliasing | caused by the limited spatial sampling during image processing and/or poor compression or a bad conversion. Object or text/graphic edges appear "jagged" or pixelated |
| v | Banding/Posterization | when low color bit depth results in defined "stepping" from one color gradation to another versus a smooth, continuous gradation |
| v | Black Frame | an unintentional frame without any image information |
| v | Blown-out/Clipped Whites | an image's highlights exceeding the maximum reproducible video level. This causes an overall loss of detail in the portions of the image where max luminance approaches true white |
| v | Burned in Subtitles | any subtitle text that is rendered into picture of the primary video asset |
| v | Chroma Contamination | colours on screen appear over-saturated with enhanced noise/distortion, or there is noticeable colour separation around the edges of characters/objects |
| v | Frame Error - Blanking Shift | intermittent horizontal and/or vertical shift of the active image |
| v | Framing Error | improper matting or scaling of the intended visual resolution & frame |
| v | Freeze Frame | a duplicate frame(s) within the sequence that contains no different information than the adjacent frame(s) |
| v | Interpolation | the process of creating new frames in between existing frames to increase the frame rate of a video. Often present on interlaced content and causes "ghosting" or double images |
| v | Non-Native Aspect Ratio | either the image is squeezed or stretched within the frame OR the content does not match the expected/intended aspect ratio |
| v | Picture Jitter | shaking of the image due to unintended, unnatural camera movement or image re-positioning. In archival film footage, may be the result of film perfs not being properly aligned with film scanner sprockets/pins |
| v | Picture Stutter | when an image sequence lacks motion blur. This can be made worse in encoded streams and during compression, as inter frame coding may further enhance any picture stutter |
| v | Pixel Error | one or several pixels in a frame which do not display the correct captured information as the pixels surrounding them. Sometimes also referred to as a "Dead Pixel" |
| v | Pixelation/Quantization | visible, individual coloured blocks within an image, often due to poor resolution scaling or rendering at lower bit depths |
| v | Placeholder Text | temporary text burned into or overlaid onto the final image. This can be used to refer to any non-final, non-creative text or watermarks, such as asset filenames, VFX shot numbers, or timecode burn-ins |
| v | Video Artifact | any extraneous element in the image that is not creatively intended. Can be used to cover anything that does not fall under one of the other specific error codes |
| v | Video Hit | any corruption in a video file that results in a shift in pixels or visual artifacts |
| v | Visible Frame Edge | active image not reaching the expected edge of the frame or matte |
| v | Visible Matte Edge | an object layer (animated or composited) that does not extend to the edge of frame or has been poorly composited into the shot, causing a noticeable edge or outline where the layer ends |
| v | Warping | usually the adverse effect of image stabilization where the frame compensation causes the image to shift in an unnatural way |
| v | Combing/Ghosting | an artifact that is often induced by converting video from one standard or frame rate to another |
| v | Commercial Blacks | black frames accompanied by silence for a duration of 2 seconds or longer, indicating a placeholder for a commercial/act break |
| v | Compression Artifacting | the adverse effect of image degradation where the image complexity exceeds the necessary bit rate/depth |
| v | Conversion Error - Quantization | result of reprocessing an image through compression, scaling and/or interpolation, causing the image to appear "blocky", aliased, or un-sharpened |
| v | Crushed Blacks | when black levels are underexposed causing an overall loss of detail in the shadows/darker portions of the image |
| v | Dropped Frame | a single or sequence of frames which are missing or corrupted in the video essence |
| v | Enhanced Video Noise | refers to footage that contains extraneous activity and/or visible distortion/pattern in grain structure; may make image appear blurry or overly "soft" |
| v | Low Quality Footage | image that exhibits visual qualities lesser than the primary source image |
| v | Luminance Shift/Flicker | a change/multiple changes in the brightness levels within a shot/scene |
| tt | Extraneous Content | events do not match any audible or on-screen text cues |
| tt | Censorship | censorship exhibited by truncation of obscenities ["s---"] or insertion of replacements during obscenities ["bleep," "#@!*&"] that does NOT follow audio |
| tt | Formatting - Positioning | position of text events conflicts with other on-screen text, negatively impacting legibility |
| tt | Incorrect Asset | contents do not match video asset |
| tt | Missing Events | sections that are present within the audio have not been translated/transcribed |
| tt | Missing Content - Identifiers | missing speaker ID or missing dashes for dual speakers or same color caption for dual speakers |
| tt | Requires Forced Narrative | certain lines, text, or scenes require translation in order for the audience to understand the plot |
| tt | Sync Drift | event sync that drifts progressively earlier/later through a section or entire program |
| tt | Sync Offset | events across section or entire program that is out of sync (early or late) by a consistent amount of frames/seconds |
| tt | Sync - Intermittent | sync with audio/video is inconsistent throughout the program (i.e. some scenes are in sync and others are out of sync) |
| tt | Translation/Transcription error | includes events with misspellings or incorrect punctuation |
Example interpolation artifact:
