Recherche avancée

Sur d’autres sites (5335)

• FFMPEG Segment Threads Equivalent Option

  24 août 2018, par Bruno Andrade

  I was downloading video from a hls m3u8 stream using the ffmpeg command in php :

  exec('ffmpeg -hide_banner -loglevel verbose -n -i https://example.com/playlist.m3u8 -acodec copy -bsf:a aac_adtstoasc -vcodec copy file.mp4 1> log.txt  2>&1', $output, $var);

  But I was having problems downloading speed and the problem was not the internet.

  So I installed and used the livestreamer.io OR streamlink.github.io/ and also slowed down the download.

  So I made use of the hls-segment-threads=5 option according to the API document :

  The size of the thread pool used to download segments.

  This solved the problem, is there any equivalent option in the FFMPEG ?
  Or have something I can do with PHP + FFMPEG to get this result that this hls-segment-threads option provides ?

  Most shared servers come with FFMPEG installed but the same does not fit with livestreamer or streamlink so I need a solution that works for everyone.

  *I do not understand python do not know what this option exactly does

• Libav : unable to read frames with mp4 files from d.tube

  4 septembre 2018, par thepros

  I am trying to read frames with mp4 files from d.tube. There is a problem specifically with videos from this website whether from stream or file. When I am trying to use avformat_find_stream_info(), I got the following message :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1226040] stream 0, offset 0x30: partial file
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1226040] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 854x480, 287 kb/s): unspecified pixel format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1226040] Could not find codec parameters for stream 1 (Audio: aac (mp4a / 0x6134706D), 48000 Hz, 2 channels, 128 kb/s): unspecified sample format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options

  I tried comparing with mp4 files from Youtube, but there is no problem at all. After I couldn’t find the solution, I skipped this message and continued, but there is Invalid data found when processing input
  error from av_read_frame(). Probably, it is from the same cause.

  In contrast, there is no problem using ffmpeg commands to get video information and extract frames. I also tried with different version of ffmpeg, but the same result. The example code I am trying to modify can be found on Youtube-test. In addition, I already added the config of ffmpeg with--enable-decoder=h264 --enable-demuxer=h264 --enable-demuxer=mp4 --enable-demuxer=h264 --enable-parser=h264 --enable-gpl --enable-libx264 --enable-encoder=libx264.

• dnn : add layer pad which is equivalent to tf.pad

  29 juillet 2019, par Guo, Yejun

  dnn : add layer pad which is equivalent to tf.pad
  the reason to add this layer first is that vf_sr uses it in its
  
  tensorflow model, and the next plan is to update the python script
  
  to convert tf.pad into native model.
  Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
  
  Signed-off-by : Pedro Arthur <bygrandao@gmail.com>
  

  • [DH] libavfilter/dnn/Makefile
  • [DH] libavfilter/dnn/dnn_backend_native_layer_pad.c
  • [DH] libavfilter/dnn/dnn_backend_native_layer_pad.h