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Sur d’autres sites (4300)

  • Trying to convert a VideoCD MPEG to MP4 using ffmpeg

    27 février 2023, par Niels Bosma

    I'm trying to convert a VideoCD MPEG to MP4 using :

    


    FFMPEG 5.1

    


    ffmpeg.exe -nostdin -y -loglevel info -hide_banner -i "ITEM0010.DAT" -c:v libx264 -crf 18 -qscale:v 3  -c:a aac -ar 96000 -map_metadata -1 "output.mp4"


    


    I'm getting :

    


    [mpeg @ 0000024b81bf4480] start time for stream 1 is not set in estimate_timings_from_pts
[mpeg @ 0000024b81bf4480] stream 1 : no TS found at start of file, duration not set
[mpeg @ 0000024b81bf4480] Could not find codec parameters for stream 1 (Audio: mp2, 0 channels, s16p): unspecified frame size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpeg, from 'C:\Concierge\ITEM0010.DAT':
  Stream #0:1[0x1c0]: Audio: mp2, 0 channels, s16p
  Stream #0:2[0x1e2]: Video: mpeg1video, yuv420p(tv), 704x576 [SAR 178:163 DAR 1958:1467], 1100 kb/s, 25 tbr, 90k tbn
Stream mapping:
  Stream #0:2 -> #0:0 (mpeg1video (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (mp2 (native) -> aac (native))
[libx264 @ 0000024b81c86000] -qscale is ignored, -crf is recommended.
[libx264 @ 0000024b81c86000] using SAR=178/163
[libx264 @ 0000024b81c86000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000024b81c86000] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0000024b81c86000] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[abuffer @ 0000024b84979880] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0000024b84979880] Error setting option time_base to value 1/0.
[graph_1_in_0_1 @ 0000024b85187c00] Error applying options to the filter.
Error reinitializing filters!
Error while filtering: Result too large
Finishing stream 0:1 without any data written to it.
[abuffer @ 0000024b84979880] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0000024b84979880] Error setting option time_base to value 1/0.
[graph_1_in_0_1 @ 0000024b85186b00] Error applying options to the filter.
Error configuring filter graph
[libx264 @ 0000024b81c86000] frame I:1     Avg QP:22.68  size: 40674
[libx264 @ 0000024b81c86000] mb I  I16..4:  3.8% 72.3% 23.9%
[libx264 @ 0000024b81c86000] 8x8 transform intra:72.3%
[libx264 @ 0000024b81c86000] coded y,uvDC,uvAC intra: 88.4% 81.1% 50.3%
[libx264 @ 0000024b81c86000] i16 v,h,dc,p: 43% 13%  0% 43%
[libx264 @ 0000024b81c86000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 16% 20%  5%  5%  6%  5%  7%  6%
[libx264 @ 0000024b81c86000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 20%  8%  5%  9%  8%  8%  6%  4%
[libx264 @ 0000024b81c86000] i8c dc,h,v,p: 42% 23% 28%  7%
[libx264 @ 0000024b


    


    81c86000] kb/s:8134.80
Conversion failed !

    


    The same command using FFMPEG 4.1 works fine.

    


  • FFMPEG : Converting from raw audio to audio/mp4 (audio is being converted with slow speed)

    29 décembre 2017, par Valdir

    If I convert from mp3 to mp4 directly everything works perfectly. But if I try to convert from raw pcm, the audio speed is slowed down.

    I’ve tried the following (this works) :

    ffmpeg -i mp3/1.mp3 -strict -2 final.mp4

    This doesn’t work as expected :

    ffmpeg -f s16le -i final.raw -strict -2 -r 26 final.mp4

    With the following output :

    Input #0, s16le, from 'final.raw':
     Duration: 00:08:37.38, bitrate: 705 kb/s
       Stream #0:0: Audio: pcm_s16le, 44100 Hz, 1 channels, s16, 705 kb/s
    File 'final.mp4' already exists. Overwrite ? [y/N] y
    Output #0, mp4, to 'final.mp4':
     Metadata:
       encoder         : Lavf56.40.101
       Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 128 kb/s
       Metadata:
         encoder         : Lavc56.60.100 aac
    Stream mapping:
     Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
    Press [q] to stop, [?] for help
    size=    8273kB time=00:08:37.38 bitrate= 131.0kbits/s
    video:0kB audio:8185kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.073808%

    I’ve tried to set parameters like :

    ffmpeg -ar 44100 -f s16le -i final.raw -strict -2 -r 26 final.mp4

    With no luck.

    In order to get the PCM from mp3 I’m using nodejs lame decoder :

    var decoder = new lame.Decoder({
           channels: 2,
           bitDepth: 16,
           sampleRate: 44100,
           bitRate: 128,
           outSampleRate: 44100, // 22050
           mode: lame.STEREO
       });
  • Unable to split audio using easy_audio_trimmer

    27 juillet 2023, par Sana Wasim

    can we use the easy_audio_trimmer package to split an audio ? I tried using the ffmpeg but it is conflicting with the above package and not work.

    


    I tried splitting by using these functions and it gave an error at the FlutterFFmpeg() method and i cant find an alternative also the duration(filePath) in the command final durationResult = await flutterSound.duration(filePath) ; shows an error

    


    Future<void> _splitAudio() async {&#xA;    setState(() {&#xA;      _progressVisibility = true;&#xA;    });&#xA;&#xA;    // Get the application documents directory&#xA;    final appDocumentsDirectory = await getApplicationDocumentsDirectory();&#xA;&#xA;    // Get the input audio file path&#xA;    final inputAudioPath = widget.file.path;&#xA;&#xA;    // Get the output file names for the two parts&#xA;    final outputFileName1 = &#x27;split_audio_part1.mp3&#x27;;&#xA;    final outputFileName2 = &#x27;split_audio_part2.mp3&#x27;;&#xA;&#xA;    // Get the output file paths for the two parts&#xA;    final outputPath1 = &#x27;${appDocumentsDirectory.path}/$outputFileName1&#x27;;&#xA;    final outputPath2 = &#x27;${appDocumentsDirectory.path}/$outputFileName2&#x27;;&#xA;&#xA;    // Calculate the duration of the original audio&#xA;    final originalDuration = await _getAudioDuration(inputAudioPath);&#xA;&#xA;    // Calculate the durations of the two parts&#xA;    final part1Duration = _startValue;&#xA;    final part2Duration = originalDuration - _endValue;&#xA;&#xA;    // Construct the FFmpeg command to split the audio&#xA;    final ffmpeg = FlutterFFmpeg();&#xA;    final splitCommand = &#x27;-i $inputAudioPath -ss 0 -t $part1Duration -c copy $outputPath1 -ss $_endValue -t $part2Duration -c copy $outputPath2&#x27;;&#xA;&#xA;    try {&#xA;      // Execute the FFmpeg command to split the audio&#xA;      final int result = await ffmpeg.execute(splitCommand);&#xA;&#xA;      if (result == 0) {&#xA;        setState(() {&#xA;          _progressVisibility = false;&#xA;        });&#xA;        debugPrint(&#x27;Audio split successfully.&#x27;);&#xA;      } else {&#xA;        setState(() {&#xA;          _progressVisibility = false;&#xA;        });&#xA;        debugPrint(&#x27;Failed to split audio.&#x27;);&#xA;      }&#xA;    } catch (error) {&#xA;      setState(() {&#xA;        _progressVisibility = false;&#xA;      });&#xA;      debugPrint(&#x27;Error while splitting audio: $error&#x27;);&#xA;    }&#xA;  }&#xA;&#xA;  Future<int> _getAudioDuration(String filePath) async {&#xA;    final flutterSound = FlutterSound();&#xA;    final durationResult = await flutterSound.duration(filePath);&#xA;    return durationResult.inMilliseconds;&#xA;  }&#xA;</int></void>

    &#xA;

    Dependencies

    &#xA;

     path_provider: ^2.0.15&#xA;  ffmpeg_kit_flutter: ^5.1.0&#xA;  audioplayers: ^4.1.0&#xA;  flutter_sound: ^9.2.13&#xA;

    &#xA;