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  1. I have a mp4 video that was downloaded off of a Facebook page by copying the url out of the the html and the file saved to a PC computer.

    I'm trying to figure out why its not playing. I tried both VLC and MPC but the video stream has decoding problems. I ran it though a few video information tools GSpot and Media Info.
    Gspot reported:

    HTML Code:
     Codec: avc1  
        Name: H.264/MPEG-4 AVC  
        Status: Codec Status Undetermined

    DirectShow Error:

    HTML Code:
        VFW_E_UNSUPPORTED_STREAM
        0x80040265
        Cannot play back the file: the format is not supported.
    Below is screenshot of the video stream along with the MediaInfo Debug Info (Detail 0). Let me know if you need a different detail level.

    My goal is to find a way to decode this video file if possible.




    MediaInfo Details:

    HTML Code:
       General
        Complete name                            : decoding-problem.mp4
        Format                                   : MPEG-4
        Format profile                           : Base Media
        Codec ID                                 : isom (isom/iso2/avc1/mp41)
        File size                                : 7.22 MiB
        Duration                                 : 1 min 45 s
        Overall bit rate                         : 577 kb/s
        Writing application                      : Lavf56.40.101
        
        Video
        ID                                       : 1
        Format                                   : AVC
        Format/Info                              : Advanced Video Codec
        Format profile                           : Main@L3
        Format settings                          : CABAC / 3 Ref Frames
        Format settings, CABAC                   : Yes
        Format settings, Reference frames        : 3 frames
        Codec ID                                 : avc1
        Codec ID/Info                            : Advanced Video Coding
        Duration                                 : 1 min 44 s
        Bit rate                                 : 508 kb/s
        Width                                    : 360 pixels
        Height                                   : 640 pixels
        Display aspect ratio                     : 0.563
        Frame rate mode                          : Variable
        Frame rate                               : 15.087 FPS
        Minimum frame rate                       : 2.119 FPS
        Maximum frame rate                       : 1 000.000 FPS
        Color space                              : YUV
        Chroma subsampling                       : 4:2:0
        Bit depth                                : 8 bits
        Scan type                                : Progressive
        Bits/(Pixel*Frame)                       : 0.146
        Stream size                              : 6.35 MiB (88%)
        Writing library                          : x264 core 157
        Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=2 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=501 / vbv_bufsize=1002 / crf_max=39.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
        Codec configuration box                  : avcC
        
        Audio
        ID                                       : 2
        Format                                   : AAC LC SBR
        Format/Info                              : Advanced Audio Codec Low Complexity with Spectral Band Replication
        Commercial name                          : HE-AAC
        Format settings                          : NBC
        Codec ID                                 : mp4a-40-5
        Duration                                 : 1 min 45 s
        Bit rate mode                            : Constant
        Bit rate                                 : 64.0 kb/s
        Channel(s)                               : 2 channels
        Channel layout                           : L R
        Sampling rate                            : 48.0 kHz
        Frame rate                               : 23.438 FPS (2048 SPF)
        Compression mode                         : Lossy
        Stream size                              : 820 KiB (11%)
        Default                                  : Yes
        Alternate group                          : 1
    Click image for larger version

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  2. Member
    Join Date
    Jan 2019
    Location
    hawai
    Search PM
    it's possibile your vid file is encrypted...
    video link?
    and how to you have download this?
    Quote Quote  
  3. Originally Posted by lomero View Post
    it's possibile your vid file is encrypted...
    video link?
    and how to you have download this?
    Good call, I think I found the problem:


    HTML Code:
    "og:video:secure_url" content="https://video-sjc3-1.xx.fbcdn.net/v/t42.26565-2/87274163_508491003429637_1900284415338841773_n.mp4?_nc_cat=109&_nc_sid=985c63&efg=eyJ2ZW5jb2RlX3RhZyI6Im9lcF9zZCJ9&_nc_oc=AQkiv_aiwBCmZ1EDJaE5huA4vftWqAgXdRpOJSbZiiE5yKd780XShJFFOdfEl4r15gY&_nc_ht=video-sjc3-1.xx&oh=92858088fe12357d771ea431e714407f&oe=5E5A18CB"
    Basically the video was downloaded by downloading the file from the url.
    Last edited by trinsic; 17th Mar 2020 at 08:41. Reason: Removed ask about encryption decoding as it is likey against th forums polices.
    Quote Quote  
  4. Ok I did some research on this and it looks like it was downloaded using this https url. Does Facebook encrypt videos by default that are posted on a user's timeline?

    Originally Posted by trinsic View Post
    Originally Posted by lomero View Post
    it's possibile your vid file is encrypted...
    video link?
    and how to you have download this?
    Good call, I think I found the problem:


    HTML Code:
    "og:video:secure_url" content="https://video-sjc3-1.xx.fbcdn.net/v/t42.26565-2/87274163_508491003429637_1900284415338841773_n.mp4?_nc_cat=109&_nc_sid=985c63&efg=eyJ2ZW5jb2RlX3RhZyI6Im9lcF9zZCJ9&_nc_oc=AQkiv_aiwBCmZ1EDJaE5huA4vftWqAgXdRpOJSbZiiE5yKd780XShJFFOdfEl4r15gY&_nc_ht=video-sjc3-1.xx&oh=92858088fe12357d771ea431e714407f&oe=5E5A18CB"
    Basically the video was downloaded by downloading the file from the url.
    Quote Quote  
  5. Can anyone who is familiar with this issue point me in the right direction?
    Quote Quote  
  6. Member
    Join Date
    Feb 2006
    Location
    United States
    Search Comp PM
    Originally Posted by trinsic View Post
    Can anyone who is familiar with this issue point me in the right direction?
    try youube-dl - https://ytdl-org.github.io/youtube-dl/supportedsites.html

    and see this post - https://github.com/ytdl-org/youtube-dl/pull/23742
    Last edited by october262; 23rd Mar 2020 at 16:51.
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  7. Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

    Originally Posted by october262 View Post
    Originally Posted by trinsic View Post
    Can anyone who is familiar with this issue point me in the right direction?
    try youube-dl - https://ytdl-org.github.io/youtube-dl/supportedsites.html
    Quote Quote  
  8. Member
    Join Date
    Feb 2006
    Location
    United States
    Search Comp PM
    Originally Posted by trinsic View Post
    Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

    Originally Posted by october262 View Post
    Originally Posted by trinsic View Post
    Can anyone who is familiar with this issue point me in the right direction?
    try youube-dl - https://ytdl-org.github.io/youtube-dl/supportedsites.html
    try this - https://stackoverflow.com/questions/48843356/decoding-facebooks-blob-video-url
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  9. I read through the post, it looks like these are instructions to download a stream that is still available on the web. This video was pulled at some point and is no longer accessible. All I have now is a mp4 file with what looks like an encrypted video stream. I'm looking for a way to decode an already downloaded video stream saved as an MP4 file.

    Originally Posted by october262 View Post
    Originally Posted by trinsic View Post
    Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

    Originally Posted by october262 View Post
    Originally Posted by trinsic View Post
    Can anyone who is familiar with this issue point me in the right direction?
    try youube-dl - https://ytdl-org.github.io/youtube-dl/supportedsites.html
    try this - https://stackoverflow.com/questions/48843356/decoding-facebooks-blob-video-url
    Quote Quote  



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