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• Missing audio and problems playing FLV video converted from 720p .mov file with FFMPEG

  18 novembre 2011, par undefined

  I have some .mov video files recorded from a JVC GC-FM1 HD video camera in 720p mode. I have FFMPEG running on a Linux box that I upload files to for encoding into FLV format. The video appears to be encoding ok, but there is no audio in the resulting FLV file. Also, when I play it back in Flash Player, in a browser or on Adobe Media Player, the video pauses at the start. It appears that Adobe Media Player waits for the progress bar to reach the end of the video before starting the playback - i.e. the video will load, the picture pauses, the progress bar seeks to the end as if the video were playing, then when it reaches the end the video picture starts. There is no audio on the video. I am noticing this in the video player I have built with Flash 8 using an FLVPlayback component and attached seekBar. The seek bar will start moving as if the video is playing but the picture remains paused.

  Here are some outputs from my FFMPEG log and the command I am using to encode the video.

  My FFMPEG command called from PHP :

  $cmd = 'ffmpeg -i ' . $sourcelocation.$filename.".".$fileext . '  -ab 96k -b 700k \
  
  -ar 44100 -s ' . $target['width'] . 'x' . $target['height'] . ' -ac 1 \
  
  -acodec libfaac ' . $destlocation.$filename.$ext_trans .' 2>&1';

  The output from my error log :

  FFmpeg version UNKNOWN, Copyright (c) 2000-2010 Fabrice Bellard, et al.
  
  built on Jan 22 2010 11:31:03 with gcc 4.1.2 20070925 (Red Hat 4.1.2-33)
  
  configuration: --prefix=/usr --enable-static --enable-shared --enable-gpl \
  
  --enable-nonfree --enable-postproc --enable-avfilter --enable-avfilter-lavf \
  
  --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm \
  
  --enable-libmp3lame --enable-libvorbis --enable-libx264
  
  libavutil     50. 7. 0 / 50. 7. 0
  
  libavcodec    52.48. 0 / 52.48. 0
  
  libavformat   52.47. 0 / 52.47. 0
  
  libavdevice   52. 2. 0 / 52. 2. 0
  
  libavfilter    1.17. 0 /  1.17. 0
  
  libswscale     0. 9. 0 /  0. 9. 0
  
  libpostproc   51. 2. 0 / 51. 2. 0
  
  
  
  Seems stream 0 codec frame rate differs from container frame rate: 119.88 (120000/1001) -> 59.94 (60000/1001)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'uploads/video/60974_v1.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      comment         : JVC GC-FM1
  
      comment-eng     : JVC GC-FM1
  
    Duration: 00:00:30.41, start: 0.000000, bitrate: 4158 kb/s
  
      Stream #0.0(eng): Video: h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 4017 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
  
  Output #0, rawvideo, to 'uploads/video/60974_v1.jpg':
  
      Stream #0.0(eng): Video: mjpeg, yuvj420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press [q] to stop encoding
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  [h264 @ 0x8e67930]B picture before any references, skipping
  
  [h264 @ 0x8e67930]decode_slice_header error
  
  [h264 @ 0x8e67930]no frame!
  
  Error while decoding stream #0.0
  
  frame=    1 fps=  0 q=3.8 Lsize=      15kB time=0.02 bitrate=7271.4kbits/s dup=482 drop=0    
  
  video:15kB audio:0kB global headers:0kB muxing overhead 0.000000%

  Which are the important errors here ?

  B picture before any references, skipping ?
  decode_slice_header error ?
  no frame ?
  or
  Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 59.94 (60000/1001)

• trying to play corrupted mpeg-ts video using android video view

  20 avril 2015, par asafb

  i am having issue playing partial content of mepg-ts files

  the video files cannot be changed / reformatted / remuxed etc

  server setup :
  contains mpeg-ts video files with h264/acc
  has script that when requested using parameters returns on of the videos "cut"
  according to parameters

  -player :

  (i have no problem playing the full videos "uncut")
  i am trying to play this using android videoview,
  during researching i have found that vlc is the only player able to play the "cut" videos (aka windows mediaplayer, google exoplayer and chrome html5 video player are unable to play)
  running vlc at debug mode revealed error when playing cut video :
  ts error : MPEG-4 descriptor not found
  remuxing the partial content using ffmepg fixes the video

  solutions tried till now :
  1.tried remuxing on the fly using android MediaExtractor and MediaMuxer - but then found out that its not possiable doing that on the fly and anyway that MediaExtractor is unable to open "cut" video
  2.tried getting the first 10K of the full video and then append them to the rest of the "cut" video - the behvior stays the same (vlc able to play while rest wont)

  video files info :

  General
  Count : 278
  Count of stream of this kind : 1
  Kind of stream : General
  Kind of stream : General
  Stream identifier : 0
  ID : 55427
  ID : 55427 (0xD883)
  Count of video streams : 1
  Count of audio streams : 1
  Video_Format_List : AVC
  Video_Format_WithHint_List : AVC
  Codecs Video : AVC
  Audio_Format_List : AAC
  Audio_Format_WithHint_List : AAC
  Audio codecs : AAC LC
  Complete name : 20150416-12.mpg
  File name : 20150416-12
  File extension : mpg
  Format : MPEG-TS
  Format : MPEG-TS
  Format/Extensions usually used : ts m2t m2s m4t m4s ts tp trp
  Commercial name : MPEG-TS
  Internet media type : video/MP2T
  Codec : MPEG-TS
  Codec : MPEG-TS
  Codec/Extensions usually used : ts m2t m2s m4t m4s ts tp trp
  File size : 338329600
  File size : 323 MiB
  File size : 323 MiB
  File size : 323 MiB
  File size : 323 MiB
  File size : 322.7 MiB
  Duration : 27322.311111
  Duration : 27s 322ms
  Duration : 27s 322ms
  Duration : 27s 322ms
  Duration : 00:00:27.322
  Overall bit rate : 1567617
  Overall bit rate : 1 568 Kbps
  Delay : 5542662.322222
  Delay : 1h 32mn
  Delay : 1h 32mn 22s 662ms
  Delay : 1h 32mn
  Delay : 01:32:22.662
  File last modification date : UTC 2015-04-16 09:29:29
  File last modification date (local) : 2015-04-16 12:29:29

  Video
  Count : 205
  Count of stream of this kind : 1
  Kind of stream : Video
  Kind of stream : Video
  Stream identifier : 0
  ID : 68
  ID : 68 (0x44)
  Menu ID : 1
  Menu ID : 1 (0x1)
  Format : AVC
  Format/Info : Advanced Video Codec
  Format/Url : http://developers.videolan.org/x264.html
  Commercial name : AVC
  Format profile : Baseline@L3.0
  Format settings : 3 Ref Frames
  Format settings, CABAC : No
  Format settings, CABAC : No
  Format settings, ReFrames : 3
  Format settings, ReFrames : 3 frames
  Format settings, GOP : M=1, N=25
  Internet media type : video/H264
  Codec ID : 27
  Codec : AVC
  Codec : AVC
  Codec/Family : AVC
  Codec/Info : Advanced Video Codec
  Codec/Url : http://developers.videolan.org/x264.html
  Codec profile : Baseline@L3.0
  Codec settings : 3 Ref Frames
  Codec settings, CABAC : No
  Codec_Settings_RefFrames : 3
  Duration : 4100
  Duration : 4s 100ms
  Duration : 4s 100ms
  Duration : 4s 100ms
  Duration : 00:00:04.100
  Nominal bit rate : 1300000
  Nominal bit rate : 1 300 Kbps
  Width : 704
  Width : 704 pixels
  Height : 576
  Height : 576 pixels
  Pixel aspect ratio : 1.455
  Display aspect ratio : 1.778
  Display aspect ratio : 16:9
  Frame rate : 25.000
  Frame rate : 25.000 fps
  Frame count : 102
  Standard : PAL
  Resolution : 8
  Resolution : 8 bits
  Colorimetry : 4:2:0
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8
  Bit depth : 8 bits
  Scan type : Progressive
  Scan type : Progressive
  Interlacement : PPF
  Interlacement : Progressive
  Bits/(Pixel*Frame) : 0.128
  Writing library : x264 - core 115
  Writing library : x264 core 115
  Writing library/Name : x264
  Writing library/Version : core 115
  Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x11 / me=dia / subme=1 / 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=0 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=25 / keyint_min=2 / scenecut=40 / intra_refresh=0 / rc_lookahead=5 / rc=cbr / mbtree=1 / bitrate=1300 / ratetol=10.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / vbv_maxrate=1300 / vbv_bufsize=2000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00

  Audio
  Count : 173
  Count of stream of this kind : 1
  Kind of stream : Audio
  Kind of stream : Audio
  Stream identifier : 0
  ID : 69
  ID : 69 (0x45)
  Menu ID : 1
  Menu ID : 1 (0x1)
  Format : AAC
  Format/Info : Advanced Audio Codec
  Commercial name : AAC
  Format version : Version 4
  Format profile : LC
  Muxing mode : ADTS
  Codec ID : 15
  Codec : AAC LC
  Codec : AAC LC
  Duration : 27322
  Duration : 27s 322ms
  Duration : 27s 322ms
  Duration : 27s 322ms
  Duration : 00:00:27.322
  Bit rate mode : VBR / VBR
  Bit rate mode : Variable / Variable
  Minimum bit rate : 99375
  Minimum bit rate : 99.4 Kbps
  Maximum bit rate : 159750
  Maximum bit rate : 160 Kbps
  Channel(s) : 2
  Channel(s) : 2 channels
  Channel positions : Front : L R
  Channel positions : 2/0/0
  Sampling rate : 48000
  Sampling rate : 48.0 KHz
  Samples count : 1311456
  Compression mode : Lossy
  Compression mode : Lossy

  i prefer finding solution without the need of NDK

  anyone has an idea how to tackle this issue ?
  Thanks

• stream video with live streaming http using FFmpeg

  19 avril 2015, par ransh

  Is it possible to stream encoded video with http live stream without going through the muxing stage ?
  For example can I use http stream with jp2 encoded format (jpeg 2000) without wrapping it first with any muxer ? if not - what can be done instead ?

  Thank you,
  Ran