Details
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Bug
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Resolution: Fixed
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P4: Low
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6.8.1
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None
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MacOS arm64 PySide 6.7.0 Python 3.9
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macOS
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79c76f961e5f9c4bcaee8b87febb4b89e279f6cb
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Multimedia wk 51-2, Multimedia wk 5-6
Description
Hello! The AAC audio encoding is no longer present in resulting .mp4 files when upgrading to PySide 6.8.1.1
Please see Repro_2.zip
with the following code:
# codec part that is failing in PySide 6.8 media_format = QMediaFormat(QMediaFormat.MPEG4) audio_codec = QMediaFormat.AudioCodec.AAC video_codec = QMediaFormat.VideoCodec.H265 media_format.setAudioCodec(audio_codec) media_format.setVideoCodec(video_codec) self.m_mediaRecorder.setMediaFormat(media_format)
As you can see when running the instructions in Repro_2.zip readme.md, you can see that the resulting video file when using pip install to install pyside 6.8.1.1, will no longer have AAC audio encoding in it:
(.venv) (base) ➜ repro2 mediainfo broken_codecs_6_8_1_1.mp4
General
Complete name : broken_codecs_6_8_1_1.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 1.71 MiB
Duration : 6 s 171 ms
Overall bit rate : 2 330 kb/s
Frame rate : 29.970 FPS
Writing application : Lavf61.1.100
Video
ID : 2
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 6 s 171 ms
Bit rate : 2 251 kb/s
Width : 1 552 pixels
Height : 1 552 pixels
Display aspect ratio : 1.000
Frame rate mode : Variable
Frame rate : 29.970 (29970/1000) FPS
Minimum frame rate : 29.970 FPS
Maximum frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.031
Stream size : 1.66 MiB (97%)
Color range : Limited
Codec configuration box : hvcC
Audio
ID : 1
Format : ER Parametric
Codec ID : mp4a-40-27
Duration : 6 s 59 ms
Source duration : 6 s 80 ms
Bit rate mode : Constant
Bit rate : 69.8 kb/s
Sampling rate : 16.0 kHz
Frame rate : 15.625 FPS (1024 SPF)
Stream size : 51.6 KiB (3%)
Source stream size : 51.8 KiB (3%)
Default : Yes
Alternate group : 1
But when downgrading to PySide 6.4.2, and running the exact same code, the resulting video file DOES have AAC audio encoding:
(.venv) (base) ➜ repro2 mediainfo working_codecs.mp4 General Complete name : working_codecs.mp4 Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 (isom/mp41/mp42) File size : 3.23 MiB Duration : 3 s 450 ms Overall bit rate : 7 852 kb/s Frame rate : 30.000 FPS Encoded date : 2025-01-22 15:38:38 UTC Tagged date : 2025-01-22 15:38:41 UTC Video ID : 1 Format : HEVC Format/Info : High Efficiency Video Coding Format profile : Main@L5@Main Codec ID : hvc1 Codec ID/Info : High Efficiency Video Coding Duration : 3 s 400 ms Bit rate : 7 880 kb/s Width : 1 552 pixels Height : 1 552 pixels Display aspect ratio : 1.000 Frame rate mode : Constant Frame rate : 30.000 FPS Color space : YUV Chroma subsampling : 4:2:0 (Type 2) Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.109 Stream size : 3.19 MiB (99%) Title : Core Media Video Encoded date : 2025-01-22 15:38:38 UTC Tagged date : 2025-01-22 15:38:41 UTC Color range : Full Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Codec configuration box : hvcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 3 s 450 ms Source duration : 3 s 437 ms Bit rate mode : Constant Nominal bit rate : 128 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 44.1 kHz Frame rate : 43.066 FPS (1024 SPF) Compression mode : Lossy Source stream size : 33.1 KiB (1%) Title : Core Media Audio Encoded date : 2025-01-22 15:38:38 UTC Tagged date : 2025-01-22 15:38:41 UTC
