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Bug
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Resolution: Fixed
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P2: Important
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6.7.1, 6.8
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None
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Linux/X11
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Multimedia wk 27-28
There is no audio stream in video files recorded with the widget camera example or the declarative camera example. Tested with two different webcams. One of the cameras is able to record audio using the audiorecorder example. See below logs produced with
QT_FFMPEG_DEBUG=true QT_LOGGING_RULES=*.ffmpeg.*=true
Output from widget example using Qt 6.7.1 binary installation:
"FFmpeg log: Requested input sample format -1 is invalid"
... qt.multimedia.ffmpeg.utils: --------------------------- qt.multimedia.ffmpeg.v4l2camera: XXXXX QV4L2Camera(0x5822c73a3850) "/dev/video0" Format_Jpeg QSize(2560, 1440) qt.multimedia.ffmpeg.v4l2camera: setting camera format to QSize(2560, 1440) 1196444237 qt.multimedia.ffmpeg.encoder: recording new media to "/home/odeon/Videos/video_0268.mp4" qt.multimedia.ffmpeg.encoder: requested format: QMediaFormat::MPEG4 QMediaFormat::AudioCodec::AAC "FFmpeg log: Setting default whitelist 'file,crypto,data'" qt.multimedia.ffmpeg.encodingformatcontext: opened by file path: /home/odeon/Videos/video_0268.mp4 , result: 0 qt.multimedia.ffmpeg.audioencoder: AudioEncoder QMediaFormat::AudioCodec::AAC qt.multimedia.ffmpeg.audioencoder: found audio codec aac qt.multimedia.ffmpeg.audioencoder: set stream time_base 1 / 96000 qt.multimedia.ffmpeg.encoder: adding video source QV4L2Camera : pixelFormat= Format_Jpeg frameSize= QSize(2560, 1440) frameRate= 30 ffmpegHWPixelFormat= -1 qt.multimedia.ffmpeg.hwaccel: No hw acceleration found for codec id 12 qt.multimedia.ffmpeg.videoencoder: found encoder mpeg4 for id 12 qt.multimedia.ffmpeg.videoencoder: Adjusted frame rate: 30 / 1 qt.multimedia.ffmpeg.videoencoder: codecContext time base 1 30000 qt.multimedia.ffmpeg.videoencoder: video source and encoder use different formats: 28 0 or sizes: QSize(2560, 1440) QSize(2560, 1440) qt.multimedia.ffmpeg.videoencoder: VideoFrameEncoder conversions initialized: sourceFormat: 28 (sw) targetFormat: 0 (sw) sourceSWFormat: 28 targetSWFormat: 0 converter: 0x5822cbbe85c0 qt.multimedia.ffmpeg.encoder: RecordingEngine::start! qt.multimedia.ffmpeg.encoder: stream header is successfully written qt.multimedia.ffmpeg.muxer: Muxer::init started thread. qt.multimedia.ffmpeg.videoencoder: VideoEncoder::init started video device thread. "FFmpeg log: detected 8 logical cores" qt.multimedia.ffmpeg.audioencoder: Most likely, av_format_write_header changed time base from 1 / 0 to 1 / 96000 "FFmpeg log: For transform of length 1024, forward, mdct_float, flags: [aligned, out_of_place], found 2 matches:" "FFmpeg log: 1: " "FFmpeg log: mdct_fwd_float_c - type: mdct_float, len: [2, ∞], factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only], prio: 96" "FFmpeg log: 2: " "FFmpeg log: mdct_naive_fwd_float_c - type: mdct_float, len: [2, ∞], factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only], prio: -130976" "FFmpeg log: For transform of length 512, forward, fft_float, flags: [aligned, inplace, preshuf], found 5 matches:" "FFmpeg log: 1: " "FFmpeg log: fft_sr_ns_float_avx2 - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 480" "FFmpeg log: 2: " "FFmpeg log: fft_sr_ns_float_fma3 - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 448" "FFmpeg log: 3: " "FFmpeg log: fft_sr_ns_float_avx - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 416" "FFmpeg log: 4: " "FFmpeg log: fft_pfa_ns_float_c - type: fft_float, len: [6, ∞], factors[2]: [7, 5, 3, 2, any], flags: [unaligned, inplace, out_of_place, preshuf], prio: 112" "FFmpeg log: 5: " "FFmpeg log: fft512_ns_float_c - type: fft_float, len: 512, factor: 2, flags: [unaligned, inplace, out_of_place, preshuf], prio: 96" "FFmpeg log: Transform tree:" "FFmpeg log: " "FFmpeg log: mdct_fwd_float_c - type: mdct_float, len: 1024, factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only]" "FFmpeg log: " "FFmpeg log: " "FFmpeg log: fft_sr_ns_float_avx2 - type: fft_float, len: 512, factor: 2, flags: [aligned, inplace, out_of_place, preshuf]" "FFmpeg log: For transform of length 128, forward, mdct_float, flags: [aligned, out_of_place], found 2 matches:" "FFmpeg log: 1: " "FFmpeg log: mdct_fwd_float_c - type: mdct_float, len: [2, ∞], factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only], prio: 96" "FFmpeg log: 2: " "FFmpeg log: mdct_naive_fwd_float_c - type: mdct_float, len: [2, ∞], factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only], prio: -130976" "FFmpeg log: For transform of length 64, forward, fft_float, flags: [aligned, inplace, preshuf], found 5 matches:" "FFmpeg log: 1: " "FFmpeg log: fft_sr_ns_float_avx2 - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 480" "FFmpeg log: 2: " "FFmpeg log: fft_sr_ns_float_fma3 - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 448" "FFmpeg log: 3: " "FFmpeg log: fft_sr_ns_float_avx - type: fft_float, len: [64, 131072], factor: 2, flags: [aligned, inplace, out_of_place, preshuf], prio: 416" "FFmpeg log: 4: " "FFmpeg log: fft_pfa_ns_float_c - type: fft_float, len: [6, ∞], factors[2]: [7, 5, 3, 2, any], flags: [unaligned, inplace, out_of_place, preshuf], prio: 112" "FFmpeg log: 5: " "FFmpeg log: fft64_ns_float_c - type: fft_float, len: 64, factor: 2, flags: [unaligned, inplace, out_of_place, preshuf], prio: 96" "FFmpeg log: Transform tree:" "FFmpeg log: " "FFmpeg log: mdct_fwd_float_c - type: mdct_float, len: 128, factors[2]: [2, any], flags: [unaligned, out_of_place, fwd_only]" "FFmpeg log: " "FFmpeg log: " "FFmpeg log: fft_sr_ns_float_avx2 - type: fft_float, len: 64, factor: 2, flags: [aligned, inplace, out_of_place, preshuf]" "FFmpeg log: intra_quant_bias = 0 inter_quant_bias = -64" qt.multimedia.ffmpeg.audioencoder: audio codec opened 0 qt.multimedia.ffmpeg.audioencoder: audio codec params: fmt= 8 rate= 96000 "FFmpeg log: Requested input sample format -1 is invalid" qt.multimedia.ffmpeg.audioencoder: AudioEncoder::init started audio device thread. qt.multimedia.ffmpeg.videoencoder: video codec opened 0 time base 1 / 30000 qt.multimedia.ffmpeg.encoder: >>>> adjusting base time to 2523986 2523986 0 qt.multimedia.ffmpeg.encoder: >>> sending frame 0 0 33333 qt.multimedia.ffmpeg.videoencoder: sending frame 0 * 1 / 30000 qt.multimedia.ffmpeg.videoencoder: got a packet 0 0 0 qt.multimedia.ffmpeg.encoder: >>> sending frame 960 32003 65336 ...
Output from widget example using dev built from source, linked to FFmpeg 7.0:
"qt.multimedia.ffmpeg.encoder: Stream initialization error: "Audio device has invalid preferred format" <- shown as a popup
... qt.multimedia.ffmpeg.utils: --------------------------- qt.multimedia.ffmpeg.v4l2camera: XXXXX QV4L2Camera(0x631ed4c7f730) "/dev/video0" Format_Jpeg QSize(2560, 1440) qt.multimedia.ffmpeg.v4l2camera: setting camera format to QSize(2560, 1440) 1196444237 qt.multimedia.ffmpeg.encoder: recording new media to "/home/odeon/Videos/video_0265.mp4" "FFmpeg log: Setting default whitelist 'file,crypto,data'" qt.multimedia.ffmpeg.encodingformatcontext: opened by file path: /home/odeon/Videos/video_0265.mp4 , result: 0 qt.multimedia.ffmpeg.encoder: requested format: QMediaFormat::MPEG4 QMediaFormat::AudioCodec::AAC qt.multimedia.ffmpeg.encoder: >>>>>>>>>>>>>>> initialize qt.multimedia.ffmpeg.encoder: Stream initialization error: "Audio device has invalid preferred format" qt.multimedia.ffmpeg.encoder: adding video source QV4L2Camera : pixelFormat= Format_Jpeg frameSize= QSize(2560, 1440) frameRate= 30 ffmpegHWPixelFormat= -1 qt.multimedia.ffmpeg.hwaccel: No hw acceleration found for codec id 12 qt.multimedia.ffmpeg.videoencoder: found encoder mpeg4 for id 12 qt.multimedia.ffmpeg.videoencoder: Adjusted frame rate: 30 / 1 qt.multimedia.ffmpeg.videoencoder: codecContext time base 1 30000 qt.multimedia.ffmpeg.videoencoder: video source and encoder use different formats: 28 0 or sizes: QSize(2560, 1440) QSize(2560, 1440) qt.multimedia.ffmpeg.videoencoder: VideoFrameEncoder conversions initialized: sourceFormat: 28 (sw) targetFormat: 0 (sw) sourceSWFormat: 28 targetSWFormat: 0 converter: 0x631ed845e300 qt.multimedia.ffmpeg.encoder: RecordingEngine::start! qt.multimedia.ffmpeg.encoder: stream header is successfully written qt.multimedia.ffmpeg.muxer: Muxer::init started thread. qt.multimedia.ffmpeg.videoencoder: VideoEncoder::init started video device thread. "FFmpeg log: detected 8 logical cores" "FFmpeg log: intra_quant_bias = 0 inter_quant_bias = -64" qt.multimedia.ffmpeg.videoencoder: video codec opened 0 time base 1 / 30000 qt.multimedia.ffmpeg.videoencoder: >>>> adjusting base time to 6635995 6635995 0 qt.multimedia.ffmpeg.videoencoder: >>> sending frame 0 0 6669328 qt.multimedia.ffmpeg.videoencoder: sending frame 0 * 1 / 30000 qt.multimedia.ffmpeg.videoencoder: got a packet 0 0 0 qt.multimedia.ffmpeg.videoencoder: >>> sending frame 1079 35978 6705306 ...