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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)

• FFmpeg playable MP4 segmented video from RTSP

  5 février 2021, par Michael Novotný

  I have problem with creating playable uncomplete MP4 file created from FFMPEG. In my case I have some infinite RTSP stream (h.264) from IP camera.
My target is record this stream to MP4 files for playback. If i use FFMPEG mp4 muxer, work correctly.

  


  /usr/bin/ffmpeg -progress pipe:5 -use_wallclock_as_timestamps 1 -analyzeduration 10000000 -probesize 10000000 -fflags +igndts -rtsp_transport tcp -hwaccel auto -loglevel warning -i rtsp://****:****@*******:****/ -y -an -vcodec copy -strict experimental -movflags frag_keyframe+empty_moov -f segment -segment_format mp4 -segment_format_options movflags=+faststart -segment_atclocktime 1 -reset_timestamps 1 -strftime 1 -segment_time 15 /Shinobi/videos/bWkwjTWdRt/Rm67cYyq50/test-%S.mp4


  


  FFMPEG will create one MP4 file which still increasing its size. If I try copy or simply open this (uncomplete, still increased ... of course :) ) file, it's correcly play. But it's still only one file ... still bigger and bigger. For long-term recording cam (few weeks) it's not good.
I want segment this stream to multiple smaller MP4 files (as you knows from another typical NVR systems). For example : segment for 30minutes.
I used "segment" muxer.

  


  /usr/bin/ffmpeg -progress pipe:5 -use_wallclock_as_timestamps 1 -analyzeduration 10000000 -probesize 10000000 -fflags +igndts -rtsp_transport tcp -hwaccel auto -loglevel warning -i rtsp://*****:****@*********:****/ -y -an -vcodec copy -strict -2 -movflags frag_keyframe+empty_moov -f mp4 -segment_atclocktime 1 -reset_timestamps 1 -strftime 1 -segment_list pipe:8 -segment_time 15 /Shinobi/videos/bWkwjTWdRt/Rm67cYyq50/test-%S.mp4


  


  It looks like work correctly. New file with defined mask is created every 30 minutes. If I try copy or simply open(and play) anyone "completed 30min segment file" it"s works correctly. Problem is with last file (more precisely : newest, still uncompleted last segment file) - it's not playable (moov atom not found).

  


  I Googled my problem many time with another keywords. I was try many my wonders. I readed FFMPEG documentation maybe 5times.

  


  Problem is with second passthroug which "segment muxer" do (which do -movflags +faststart .. for example). It's logicaly, second passthroug not be did in last(newest) file yet.

  


  Is there way to make it work ? If I want see time for 2-3 mins ago it's no possible wait up to 30minutes for "complete segment" ... and at the same time it is not possible to have a billion files with 2-3sec segments.
How did other NVR systems solve this ? Synology, Hikvision and more has in their file system recorded MP4 soubory which one of them is still uncompleted, still growing, but normaly PLAYABLE.

  


  A few last days I tried this with no success. I'am absolutely angry and sad. I hope that my text is understandable

  


  Thank you

  


  This options has no effect in my case (tried) :

  


  -movflags frag_keyframe+empty_moov

  


  -movflags faststart

  


  -movflags separate_moof

  


  -fragsize *** / -fragtime ***

  


  -strict -2 / -strict experimental

  


• avutil/mips : refactor msa SLDI_Bn_0 and SLDI_Bn macros.

  6 août 2019, par gxw

  avutil/mips : refactor msa SLDI_Bn_0 and SLDI_Bn macros.
  Changing details as following :
  
  1. The previous order of parameters are irregular and difficult to
  
     understand. Adjust the order of the parameters according to the
  
     rule : (RTYPE, input registers, input mask/input index/..., output registers).
  
     Most of the existing msa macros follow the rule.
  
  2. Remove the redundant macro SLDI_Bn_0 and use SLDI_Bn instead.
  Reviewed-by : Shiyou Yin <yinshiyou-hf@loongson.cn>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mips/h264dsp_msa.c
  • [DH] libavcodec/mips/h264qpel_msa.c
  • [DH] libavcodec/mips/hevc_lpf_sao_msa.c
  • [DH] libavcodec/mips/hevcpred_msa.c
  • [DH] libavcodec/mips/hpeldsp_msa.c
  • [DH] libavcodec/mips/me_cmp_msa.c
  • [DH] libavcodec/mips/qpeldsp_msa.c
  • [DH] libavcodec/mips/vp8_mc_msa.c
  • [DH] libavcodec/mips/vp9_idct_msa.c
  • [DH] libavcodec/mips/vp9_lpf_msa.c
  • [DH] libavcodec/mips/vp9_mc_msa.c
  • [DH] libavutil/mips/generic_macros_msa.h