Advanced search

On other websites (8773)

• How to write the *args of function "avfilter_graph_send_command"(ffmpeg) when there has multiple drawtext targets?

  19 August 2020, by cube_sun

  I add 2 drawtext on ffmpeg drawtext filter, my filters descr is like this
"drawtext=fontfile=simhei.ttf:fontcolor=#ff00ff@%1.0:fontsize=20:box=1.0:boxcolor=#00ff00@%1.0:x=0:y=0:text='123',drawtext=fontfile=simhei.ttf:fontcolor=#ff00ff@%1.0:fontsize=20:box=1.0:boxcolor=#00ff00@%1.0:x=0:y=200:text='456'", so there have two characters watermark on video.
And this filter supports altering parameters via commands: reinit, so I use function: avfilter_graph_send_command(m_filter_graph, "drawtext", "reinit", m_filters_args, NULL, 0, 0) to modify the watermarks on realtime.(m_filters_args is my *arg variate)
I try snprintf the m_filters_args as
"fontfile=simhei.ttf:fontcolor=#ff00ff@%1.0:fontsize=20:box=1.0:boxcolor=#00ff00@%1.0:x=0:y=10:text='112233',fontfile=simhei.ttf:fontcolor=#ff00ff@%1.0:fontsize=20:box=1.0:boxcolor=#00ff00@%1.0:x=0:y=200:text='445566'", but it doesn't work as I wanted, it can only modify one drawtext, I want they can be both modified, I tried some other ways, but all failed.
can u tell me how to write the *arg or there has other ways to solve the problem.

  


  Any help would be very appreciated!

  


• FFmpeg Impossible to convert between the formats supported by the filter

  17 April 2020, by Changer098

  I'm trying to do GPU accelerated HDR tonemapping (HDR->SDR) with ffmpeg and opencl, but I keep running into this error: Impossible to convert between the formats supported by the filter 'Parsed_hwupload_1' and the filter 'auto_scaler_1'.
  
I've tried using the documentation filtergraph with this command

  



  ffmpeg -loglevel debug -y -hwaccel cuvid -init_hw_device opencl:0.0 -threads 1 -i \ 
hdr.mkv -filter_complex
"format=p010,hwupload,tonemap_opencl=t=bt2020:tonemap=linear:format=p010, \
hwdownload,format=p010" \
-c:a copy -scodec copy -c:v hevc_nvenc -preset slow -level 5.1 -rc:v vbr_hq -cq:v \
 19 -b:v 17500k \
-maxrate:v 22000k ~/Desktop/sdr.mkv


  



  which results in this log

  



  Applying option init_hw_device (initialise hardware device) with argument opencl:0.0.
[AVHWDeviceContext @ 0x5587b5542fc0] 1 OpenCL platforms found.
[AVHWDeviceContext @ 0x5587b5542fc0] 1 OpenCL devices found on platform "NVIDIA CUDA".
[AVHWDeviceContext @ 0x5587b5542fc0] 0.0: NVIDIA CUDA / Graphics Device
[AVHWDeviceContext @ 0x5587b5542fc0] The cl_intel_va_api_media_sharing extension is required for QSV to OpenCL mapping.
[AVHWDeviceContext @ 0x5587b5542fc0] QSV to OpenCL mapping not usable.
{{ Shortened }}
[hevc @ 0x5587b60c8e00] Initializing CUDA frames context: sw_format = yuv420p10le, width = 3840, height = 2160
[AVHWFramesContext @ 0x5587b7573f00] Pixel format 'yuv420p10le' is not supported
[hevc @ 0x5587b60c8e00] Error initializing a CUDA frame pool
cuvid hwaccel requested for input stream #0:0, but cannot be initialized.
[hevc @ 0x5587b60c8e00] Error parsing NAL unit #6.
Error while decoding stream #0:0: Operation not permitted
{{ Shortened }}
[Parsed_format_0 @ 0x5587b6330c40] Setting 'pix_fmts' to value 'p010'
[Parsed_tonemap_opencl_2 @ 0x5587b632d3c0] Setting 't' to value 'bt2020'
[Parsed_tonemap_opencl_2 @ 0x5587b632d3c0] Setting 'tonemap' to value 'linear'
[Parsed_tonemap_opencl_2 @ 0x5587b632d3c0] Setting 'format' to value 'p010'
[Parsed_format_4 @ 0x5587b6331d40] Setting 'pix_fmts' to value 'p010'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] Setting 'video_size' to value '3840x2160'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] Setting 'pix_fmt' to value '64'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] Setting 'time_base' to value '1/1000'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] Setting 'frame_rate' to value '24000/1001'
[graph 0 input from stream 0:0 @ 0x5587b6359f40] w:3840 h:2160 pixfmt:yuv420p10le tb:1/1000 fr:24000/1001 sar:1/1
[format @ 0x5587b6359e00] Setting 'pix_fmts' to value 'yuv420p|nv12|p010le|yuv444p|p016le|yuv444p16le|bgr0|rgb0|cuda'
[auto_scaler_0 @ 0x5587b7581a00] w:iw h:ih flags:'bilinear' interl:0
[Parsed_format_0 @ 0x5587b6330c40] auto-inserting filter 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0' and the filter 'Parsed_format_0'
[auto_scaler_1 @ 0x5587b634e8c0] w:iw h:ih flags:'bilinear' interl:0
[Parsed_tonemap_opencl_2 @ 0x5587b632d3c0] auto-inserting filter 'auto_scaler_1' between the filter 'Parsed_hwupload_1' and the filter 'Parsed_tonemap_opencl_2'
Impossible to convert between the formats supported by the filter 'Parsed_hwupload_1' and the filter 'auto_scaler_1'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0


  



  I'm using cuvid because I haven't been able to get ffmpeg to compile with nvdec support even though my GPU supports it. Any help would be appreciated!

  


• avcodec/hevc, h2645_parse: Fix HEVC NAL unit names and constants

  18 March 2020, by Andreas Rheinhardt

  avcodec/hevc, h2645_parse: Fix HEVC NAL unit names and constants
  This commit fixes the names and constants of the reserved NAL units
  
  with nal_unit_type 22 resp. 23. They were "IRAP_IRAP_VLC2x", but are
  
  actually "RSV_IRAP_VLC2x".
  This also required a change to cbs_h265_syntax_template.c.
  Reviewed-by: Anton Khirnov <anton@khirnov.net>
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavcodec/cbs_h265_syntax_template.c
  • [DH] libavcodec/h2645_parse.c
  • [DH] libavcodec/hevc.h