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• How to read media info of media files from nodejs

  10 février 2021, par Seth De

  How can we identify media file is whether audio-only or audio/video file in node.js e.g mp4 file can be audio-only or both audio-video,

  


• Horizontally show two videos side by side and export to one video

  15 juin 2015, par Michael Liberman

  What I am trying to achieve :
  Programmatically (using some kind of script) combine two different videos to one video where the videos are shown side by side and sound from both videos is played simultaneously.

  I found at least two ways I could display two videos side by side but in each one I have a different problem that makes it difficult to complete the process :

  1. Avisyth and Avs2Avi :
     Avisyth really makes the process easy. With a simple Avisyth script like this you should be able to play two videos side by side :

     video1=AVISource("d:\file1.avi")<br />
video2=AVISource("d:\file2.avi")<br />
StackHorizontal(video1,video2)

     The creation of a new output file can be done with avs2avi.
     The problem here is that i am not able to play even one avi file with avisyth because I get "AviSource couldn’t locate a decompressor for fourcc xvid" message. I googled for the solutions to that problem but nothing helped. GSpot says that i have all the codecs needed and it seems I can not do anything. Because I can not get to running real videos, I dont know if the final video plays sounds from both videos. Avisyth installed correctly and I am able to run the following script StackHorizontal(version ,version).

  2. ffmpeg
     Works like a charm with two videos and the final file BUT i do not get the sounds from both videos but only the first one. I found out that the solution to add sound from the second video will be by using the libfaac in the command line, like that :
     

     ffmpeg.exe -i video1.mp4 -vf "[in] scale=iw/2:ih/2, pad=2*iw:ih [left]; movie=video2.mp4, scale=iw/3:ih/3 [right]; [left][right] overlay=main_w/2:0 [out]" -c:a libfaac -b:v 768k Output.mp4

  but i always get an error that the encoder libfaac can not be found. I downloaded the libfaac.dll but still no result.

  Is there a solution to any of these problems ? Is there another way to programmatically make one video from two videos that are played side by side ? Thanks in advance.

• Media-players show longest duration of multi-track MP4 files from FFmpeg [closed]

  9 juillet 2024, par EasonWaii

  I need to merge two videos into one using ffmpeg. The resulting video should have two video tracks and one audio track, with the audio track taken from the longer video.

  


  When playing the merged video in a player like PotPlayer or VLC, it should default to playing the shorter video track. However, users should be able to switch to the other video track if they want.

  


  The problem I am facing :
Everything is working fine, except when the player defaults to the shorter video track, it shows the timeline of the longer video track.

  


   built with Apple clang version 15.0.0 (clang-1500.3.9.4)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/7.0.1 --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
{
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output21.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf59.16.100
  Duration: 00:00:12.84, start: 0.000000, bitrate: 2207 kb/s
  Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 720x1280 [SAR 1:1 DAR 9:16], 1052 kb/s, 30 fps, 30 tbr, 15360 tbn
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 720x1280, 1293 kb/s, 29.83 fps, 29.83 tbr, 11456 tbn (default)
      Metadata:
        handler_name    : ?Mainconcept Video Media Handler
        vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
    "streams": [
        {
            "index": 0,
            "codec_name": "hevc",
            "codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
            "profile": "Main",
            "codec_type": "video",
            "codec_tag_string": "hev1",
            "codec_tag": "0x31766568",
            "width": 720,
            "height": 1280,
            "coded_width": 720,
            "coded_height": 1280,
            "closed_captions": 0,
            "film_grain": 0,
            "has_b_frames": 2,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "9:16",
            "pix_fmt": "yuv420p",
            "level": 93,
            "color_range": "tv",
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "id": "0x1",
            "r_frame_rate": "30/1",
            "avg_frame_rate": "30/1",
            "time_base": "1/15360",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 196096,
            "duration": "12.766667",
            "bit_rate": "1052926",
            "nb_frames": "383",
            "extradata_size": 2480,
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "non_diegetic": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "und",
                "handler_name": "VideoHandler",
                "vendor_id": "[0][0][0][0]"
            }
        },
        {
            "index": 1,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_tag_string": "avc1",
            "codec_tag": "0x31637661",
            "width": 720,
            "height": 1280,
            "coded_width": 720,
            "coded_height": 1280,
            "closed_captions": 0,
            "film_grain": 0,
            "has_b_frames": 2,
            "pix_fmt": "yuv420p",
            "level": 31,
            "color_range": "tv",
            "color_space": "bt709",
            "color_transfer": "bt709",
            "color_primaries": "bt709",
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "is_avc": "true",
            "nal_length_size": "4",
            "id": "0x2",
            "r_frame_rate": "179/6",
            "avg_frame_rate": "3448256/115597",
            "time_base": "1/11456",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 115597,
            "duration": "10.090520",
            "bit_rate": "1293284",
            "bits_per_raw_sample": "8",
            "nb_frames": "301",
            "extradata_size": 46,
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "non_diegetic": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "eng",
                "handler_name": "\u001fMainconcept Video Media Handler",
                "vendor_id": "[0][0][0][0]"
            }
        },
        {
            "index": 2,
            "codec_name": "aac",
            "codec_long_name": "AAC (Advanced Audio Coding)",
            "profile": "LC",
            "codec_type": "audio",
            "codec_tag_string": "mp4a",
            "codec_tag": "0x6134706d",
            "sample_fmt": "fltp",
            "sample_rate": "44100",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "initial_padding": 0,
            "id": "0x3",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/44100",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 566244,
            "duration": "12.840000",
            "bit_rate": "130447",
            "nb_frames": "554",
            "extradata_size": 5,
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "non_diegetic": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "und",
                "handler_name": "SoundHandler",
                "vendor_id": "[0][0][0][0]"
            }
        }
    ],
    "format": {
        "filename": "output21.mp4",
        "nb_streams": 3,
        "nb_programs": 0,
        "nb_stream_groups": 0,
        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
        "format_long_name": "QuickTime / MOV",
        "start_time": "0.000000",
        "duration": "12.840000",
        "size": "3543155",
        "bit_rate": "2207573",
        "probe_score": 100,
        "tags": {
            "major_brand": "isom",
            "minor_version": "512",
            "compatible_brands": "isomiso2avc1mp41",
            "encoder": "Lavf59.16.100"
        }
    }
}



  


  I want the timeline to display correctly according to the shorter video track when it is being played, without truncating the timeline of the longer video track and affecting its playback.