Details
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Bug
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Resolution: Fixed
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P2: Important
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None
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6.8.0 FF
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None
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97099557e (dev), cdbf540a4 (6.8), 116785341 (6.7), 8fa80cde3 (tqtc/lts-6.5)
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Multimedia wk 35-38
Description
When I record video with the widget camera example, no audio is recorded when using built-in microphone (4 channel sound). With external camera (2 channel sound), it works.
With internal microphone, the resulting media has an audio stream, but bits per sample is zero:
"codec_name": "aac", "codec_long_name": "AAC (Advanced Audio Coding)", "profile": "-1", "codec_type": "audio", "codec_tag_string": "mp4a", "codec_tag": "0x6134706d", "sample_fmt": "fltp", "sample_rate": "48000", "channels": 4, "channel_layout": "4.0", "bits_per_sample": 0, "initial_padding": 0, "id": "0x1", "r_frame_rate": "0/0", "avg_frame_rate": "0/0", "time_base": "1/48000", "start_pts": 0, "start_time": "0.000000", "duration_ts": 102384, "duration": "2.133000", "bit_rate": "265269", "nb_frames": "101",
FFmplay complains that
[aac @ 000001985320ec40] channel element 1.0 is not allocated [aac @ 000001985320ec40] channel element 1.0 is not allocated
Errors on macOS recorded with minimal-audio-recorder
➜ qtbase git:(d2ed6a3d73) /Users/tim/build/qt-dev-xc15-Debug/qtmultimedia/tests/manual/minimal-audio-recorder/minimal-audio-recorder.app/Contents/MacOS/minimal-audio-recorder tst.aac Available HW decoding frameworks: videotoolbox Available HW encoding frameworks: videotoolbox Available audio devices: ID "BuiltInMicrophoneDevice" Description "MacBook Pro Microphone" ID "EQMDevice" Description "eqMac" ID "MSLoopbackDriverDevice_UID" Description "Microsoft Teams Audio" Using default device qt.multimedia.ffmpeg.audioencoder: AudioEncoder QMediaFormat::AudioCodec::AAC Recording 5 seconds of audio to "/Users/tim/Music/tst.aac" qt.multimedia.ffmpeg.audioencoder: set stream time_base 1 / 48000 qt.multimedia.ffmpeg.audioencoder: audio codec params: fmt= 8 rate= 48000 qt.multimedia.ffmpeg.audioencoder: found audio codec aac qt.multimedia.ffmpeg.audioencoder: Created resampler with audio formats conversion [ sample format: flt , sample rate: 48000 , channel layout: [ nb_channels: 1 , order: 1 , mask: 100 ] ] -> [ sample format: fltp , sample rate: 48000 , channel layout: [ nb_channels: 1 , order: 1 , mask: 100 ] ] Recording completed [aac @ 0x7fce5e20fc40] Qavg: 120.107 ➜ qtbase git:(d2ed6a3d73) ffprobe /Users/tim/Music/tst.aac ffprobe version 7.0.2 Copyright (c) 2007-2024 the FFmpeg developers built with Apple clang version 15.0.0 (clang-1500.3.9.4) configuration: --prefix=/usr/local/Cellar/ffmpeg/7.0.2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox libavutil 59. 8.100 / 59. 8.100 libavcodec 61. 3.100 / 61. 3.100 libavformat 61. 1.100 / 61. 1.100 libavdevice 61. 1.100 / 61. 1.100 libavfilter 10. 1.100 / 10. 1.100 libswscale 8. 1.100 / 8. 1.100 libswresample 5. 1.100 / 5. 1.100 libpostproc 58. 1.100 / 58. 1.100 [aac @ 0x7fba55b04100] Format aac detected only with low score of 1, misdetection possible! [aac @ 0x7fba55b04c00] More than one AAC RDB per ADTS frame is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. [aac @ 0x7fba55b04c00] Reserved bit set. [aac @ 0x7fba55b04c00] Number of bands (10) exceeds limit (6). [aac @ 0x7fba55b04c00] channel element 1.14 is not allocated [aac @ 0x7fba55b04c00] channel element 2.11 is not allocated [aac @ 0x7fba55b04c00] channel element 3.5 is not allocated [aac @ 0x7fba55b04100] Estimating duration from bitrate, this may be inaccurate [aac @ 0x7fba55b04100] Could not find codec parameters for stream 0 (Audio: aac (LTP), mono, fltp, 418 kb/s): unspecified sample rate Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, aac, from '/Users/tim/Music/tst.aac': Duration: 00:00:00.73, bitrate: 436 kb/s Stream #0:0: Audio: aac (LTP), mono, fltp, 418 kb/s
Attachments
Issue Links
- relates to
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QTBUG-132463 Recording video and audio with AAC audio codec don't play back correctly in Windows Media Player or Quicktime on macOS
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- Closed
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For Gerrit Dashboard: QTBUG-128336 | ||||||
---|---|---|---|---|---|---|
# | Subject | Branch | Project | Status | CR | V |
585980,3 | Add manual test with 'minimal' audio recording implementation | dev | qt/qtmultimedia | Status: MERGED | +2 | 0 |
586768,2 | Add manual test with 'minimal' audio recording implementation | 6.8 | qt/qtmultimedia | Status: MERGED | +2 | 0 |
586963,2 | Add manual test with 'minimal' audio recording implementation | 6.7 | qt/qtmultimedia | Status: MERGED | +2 | 0 |
587144,2 | Add manual test with 'minimal' audio recording implementation | tqtc/lts-6.5 | qt/tqtc-qtmultimedia | Status: MERGED | +2 | 0 |