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• Scale with scale_vaapi and than pad, got error. Seems ok without "pad"

  24 mai 2023, par huangda1982

  My computer : customized Linux, haswell
I am trying to scale 1280x720 video to 640x450 in 640x480 frame with black borders. To do so, I run this command :

  


  ffmpeg -v warning -hide_banner -init_hw_device vaapi=vaapi0:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device vaapi0 -filter_hw_device vaapi0 -i 'my_video.mp4' -vf 'scale_vaapi=640:450,pad=640:480:0:14' -c:v h264_vaapi -q:v 18 -profile:v main -level 3.1 -c:a aac -q:a 3 -f mp4 out.mp4 -loglevel verbose


  


  And I got this error :

  


  Impossible to convert between the formats supported by the filter &#x27;Parsed_scale_vaapi_0&#x27; and the filter &#x27;auto_scaler_0&#x27;<br />&#xA;Error reinitializing filters!&#xA;Failed to inject frame into filter network: Function not implemented&#xA;Error while processing the decoded data for stream #0:0&#xA;

  


  When I removed the ",pad=640:480:0:14" part, the command continued. I pressed ctrl-c, and did not check the result.

  


  "-q:v 18", "-level 3.1" and "-q:a" options seem not work.

  


  Full message :

  


  [h264 @ 0x55dfeb529340] Reinit context to 1280x720, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'my_video.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: mp41
    creation_time   : 1970-01-01T00:00:00.000000Z
    encoder         : PotEncoder
  Duration: 00:22:45.01, start: 0.000000, bitrate: 3264 kb/s
  Stream #0:0(und): Video: h264 (Constrained Baseline), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x720 [SAR 1:1 DAR 16:9], 3068 kb/s, 23.98 fps, 23.98 tbr, 1199 tbn, 47.96 tbc (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01T00:00:00.000000Z
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_vaapi))
  Stream #0:1 -> #0:1 (mp3 (mp3float) -> aac (native))
Press [q] to stop, [?] for help
[h264 @ 0x55dfeb553e40] Reinit context to 1280x720, pix_fmt: vaapi_vld
[graph_1_in_0_1 @ 0x55dfeb6b7580] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3
[graph 0 input from stream 0:0 @ 0x55dfebb4d000] w:1280 h:720 pixfmt:vaapi_vld tb:1/1199 fr:1199/50 sar:1/1
[auto_scaler_0 @ 0x55dfebb4f940] w:iw h:ih flags:'bicubic' interl:0
[Parsed_pad_1 @ 0x55dfebb4c700] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_scale_vaapi_0' and the filter 'Parsed_pad_1'
Impossible to convert between the formats supported by the filter 'Parsed_scale_vaapi_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[AVIOContext @ 0x55dfeb5522c0] Statistics: 0 seeks, 0 writeouts
[aac @ 0x55dfeb551600] Qavg: 354.000
[aac @ 0x55dfeb551600] 2 frames left in the queue on closing
[AVIOContext @ 0x55dfeb530500] Statistics: 1144787 bytes read, 2 seeks
Conversion failed!


  


• The latest ffmpeg shows "get_buffer() failed". Is this a bug ?

  20 juin 2023, par Ryan

  ffmpeg version 2023-06-19-git-1617d1a752-full_build-www.gyan.dev

  


  i7-1255U, Windows 11

  


  The command line is

  


  "ffmpeg.exe"  -y  -hwaccel qsv  -ss 00:00:03.461  -to 00:00:12.009  -i "input.mov"   -c:v h264_qsv -global_quality 25 -look_ahead 1 -preset veryslow -c:a aac -ar 48000 -ac 2 -ab 128k output.mp4


  


  The "input.mov" is mjpeg.

  


  The result is :

  


  [mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory


  


  The messages above repeats many many many times. Finally, it shows :

  


  [vist#0:0/mjpeg @ 000001993025ff00] Error submitting EOF to decoder: Cannot allocate memory


  


  I tried the same command line on a very old version, and it works fine. Is this a bug or there is something new that comes with the new version ?

  


  Thank you for your help.

  


• Ffmpeg : How to fix error "Please choose an encoder manually" ?

  9 juillet 2023, par Alex

  I am trying to convert a x265 videofile to a x264 format so it can be played on a television. I am trying the following command

  


  ffmpeg -i input.mkv -f mp4 -vcodec libx264 -preset fast -profile:v main -acodec aac -map 0:0 -map 0:1 -map 0:2 test.mp4


  


  to select videos stream 0:0 for video, stream 0:1 for audio and stream 0:2 for the subtitle. However I get an error

  


  Automatic encoder selection failed Default encoder for format mp4 (codec none) is probably disabled. Please choose an encoder manually.
Error selecting an encoder


  


  How to fix this command ?

  


  P.S. I am not an expert in ffmpeg or videos conversion/formats/encodings/audio formats/subtitle formats.

  


  I found EXACTLY ONE google search result with the exact error phrase HERE. And that is not helping as I do not even understand the first sentence.

  


  Below is the output for the first three streams :

  


  Input #0, matroska,webm, from 'input.mkv':
  Metadata:
    creation_time   : 2021-03-25T09:13:20.000000Z
    ENCODER         : Lavf58.29.100
  Duration: 00:23:57.65, start: 0.000000, bitrate: 2103 kb/s
  Stream #0:0(jpn): Video: hevc (Main 10), yuv420p10le(tv), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn (default)
    Metadata:
      title           : [Judas] x265 10b
      ENCODER         : Lavc58.54.100 libx265
      BPS-eng         : 1973938
      DURATION-eng    : 00:23:55.017000000
      NUMBER_OF_FRAMES-eng: 34406
      NUMBER_OF_BYTES-eng: 354079423
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:1(jpn): Audio: aac (LC), 44100 Hz, stereo, fltp (default)
    Metadata:
      title           : Japanese
      BPS-eng         : 128000
      DURATION-eng    : 00:23:55.086000000
      NUMBER_OF_FRAMES-eng: 61804
      NUMBER_OF_BYTES-eng: 22961378
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:2(eng): Subtitle: ass
    Metadata:
      title           : English
      BPS-eng         : 196
      DURATION-eng    : 00:23:53.580000000
      NUMBER_OF_FRAMES-eng: 478
      NUMBER_OF_BYTES-eng: 35129
      _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES


  


  I found a related question HERE whose answer I do not fully understand. However, I tried the following command

  


  ffmpeg -i input.mkv -f mp4 -vcodec libx264 -preset fast -profile:v main -acodec aac -map 0:0 -map 0:1 -map 0:2 -c:s mov_text  test.mp4


  


  but got a new error

  


  Error initializing output stream: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height


  


  I thought I am defining an "encoder" for output stream "#0:0" (which I think is video), namely libx264. So what else to do here ?

  


  I tried -acode copy and also to use -qp 0 in the command line which all did not work.