Facebook Mobile Video Download Playback Decoding Problem

[trinsic]

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:

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

DirectShow Error:

    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:

   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

[lomero]

it's possibile your vid file is encrypted...
video link?
and how to you have download this?

[trinsic]

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:

"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.

[trinsic]

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?

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:

"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.

[trinsic]

Can anyone who is familiar with this issue point me in the right direction?

[october262]

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

[trinsic]

Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

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

[october262]

Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

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

[trinsic]

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.

Thank you. The file no longer exists on the Facebook users account. This mp4 file is all I have. Any way to decode it?

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