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  • JavaCV ffmpeg video/audio not syncing

    3 janvier 2024, par lukaking98

    i have cut two videos into multiple segments and i am trying to rearangle them randomly. The problem is that the audio wont sync properly... All the segments have the same frame rate, 30 fps, same resolution, same audio and video codec (AV_CODEC_ID_AAC, AV_CODEC_ID_H264) and same bitrate.

    


                    FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFilePath, 1920, 1080);
                recorder.setFrameRate(30); 
                recorder.setFormat("mp4");              

                recorder.setAudioChannels(2); 
                recorder.setSampleRate(44100); 
                recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC); 
                recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
                recorder.setVideoBitrate(10_000_000); 

                recorder.start(); 
                
                Frame videoFrame;
                for (FFmpegFrameGrabber videoGrabber : videoGrabbers) {
                    videoGrabber.start();
                    while ((videoFrame = videoGrabber.grabFrame(true, true, true, false)) != null) { 
                        recorder.record(videoFrame);
                    }                                   
                }
                recorder.stop();
                recorder.release();  


    


    if i enable grabFrame boolean doAudio to true, the video would be 43s, if i disable the audio it would be 34s.
Also at the end the video ends at 34s and the audio continues until it finishes.

    


    Any way i can sync this so the audio matches the video perfectly ??

    


  • ffmpeg error that causes songs to be skipped in discord.py music bot

    28 septembre 2022, par Wolfy

    I'm making a music bot in python. Sometimes when the music is playing, such an error may come out

    


    [tls @ 0x56540863c280] Error in the pull function.
[matroska,webm @ 0x565408639460] Read error
[tls @ 0x56540863c280] The specified session has been invalidated for some reason.


    


    [https @ 0x55ef3042ae80] HTTP error 403 Forbidden
https://rr5---sn-qxoedne7.googlevideo.com/videoplayback?expire=1643908737&ei=ILr7YYvvOfeA_tcP1P-O6AE&ip=34.70.213.61&id=o-AP2Y_3KL9ByYzaHpK9BTYU-rXEdyhVBdmAya4-RDcnhA&itag=249&source=youtube&requiressl=yes&mh=up&mm=31%2C26&mn=sn-qxoedne7%2Csn-5goeen7d&ms=au%2Conr&mv=u&mvi=5&pl=20&vprv=1&mime=audio%2Fwebm&ns=R7IIdhU6N1T67hOi5mk4h1gG&gir=yes&clen=1237668&dur=200.101&lmt=1643350535759614&mt=1643886547&fvip=4&keepalive=yes&fexp=24001373%2C24007246&c=WEB&txp=5432434&n=f5o7FLev4k11Jt4&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl&lsig=AG3C_xAwRQIhAI7fuWyVPY7zdiGm2FemrcqsDuQWjcqfSnLKxw66QoSwAiBOJHGVpoRCKu2ZnW3DPGxK8bKS-FfvyyxG2hRgg2TRVw%3D%3D&sig=AOq0QJ8wRQIgOWU5ecufOjhtuwQNdWX5l140N5cW7Hu01SfC9b6Zkg4CIQC0ZzrrXwUtf4qkvWZaQCEfWpOmZJhBmca0sYqqmxh75A==: Server returned 403 Forbidden (access denied)


    


    [dash @ 0x5596ac7e6460] Could not read complete fragment.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5596acb12940] Stream #0: not enough frames to estimate rate; consider increasing probesize
[dash @ 0x5596ac7e6460] Could not read complete fragment.


    


    A piece of code to launch a song :

    


    YDL_OPTIONS = {'format': 'bestaudio/best','outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s','restrictfilenames': True,'noplaylist': True,'nocheckcertificate': True,'ignoreerrors': False,'logtostderr': False,'quiet': True,'no_warnings': True, 'forceipv4': True,'cookies': True, 'default_search': 'auto','encoding': 'utf-8', "simulate": True, 'audioformat': "mp3",'audioquality': 5,'source_address': '0.0.0.0',"bitrate": 320000,"prefer_ffmpeg": True,"usenetrc": True,"verbose": False}
FFMPEG_OPTIONS = {'options': '-vn'}
vc.play(discord.FFmpegPCMAudio( source = URL, **FFMPEG_OPTIONS))
vc.source = discord.PCMVolumeTransformer(vc.source)
vc.source.volume = 1


    


    How do I catch these errors or how do I fix them ?

    


  • avformat/mux : keep AVPacket fields consistent in ff_write_chained()

    24 juillet 2014, par Michael Niedermayer
    avformat/mux : keep AVPacket fields consistent in ff_write_chained()

    This might have caused double frees in theory, i do not have a test case
    
though
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/mux.c

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