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• ffmpeg.wasm - How to do literally anything with a blob url

  24 novembre 2024, par SeriousLee

  I'm using the ffmpeg.wasm for the first time and I can't get anything working, beyond loading it. I have this function that does nothing in particular (I got it from the vite + react example in the docs, slightly modified) and all I want to do is pass it a blob URL like this blob:http://localhost:5173/c7a9ea7c-aa26-4f4f-9c80-11b8aef3e81f and run through the function and have it give me anything back. But instead, it hangs on the ffmpeg.exec command and never completes. And yes, I've determined that the input blob does work - it's an 8MB, 12-second long mp4 clip.

  


  Here's the function :

  


      const processOutputVideo = async (videoURL) => {
      const ffmpeg = ffmpegRef.current;

      await ffmpeg.writeFile("input.mp4", await fetchFile(videoURL));
      await ffmpeg.exec(["-i", "input.mp4", "output.mp4"]);

      const fileData = await ffmpeg.readFile("output.mp4");
      const blob = new Blob([fileData.buffer], { type: "video/mp4" });
      const blobUrl = URL.createObjectURL(blob);

      return blobUrl;
    };


  


  And here's the ffmpeg logs from my terminal.

  


  [FFMPEG stderr] ffmpeg version 5.1.4 Copyright (c) 2000-2023 the FFmpeg developers
Post.jsx:35 [FFMPEG stderr]   built with emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.40 (5c27e79dd0a9c4e27ef2326841698cdd4f6b5784)
Post.jsx:35 [FFMPEG stderr]   configuration: --target-os=none --arch=x86_32 --enable-cross-compile --disable-asm --disable-stripping --disable-programs --disable-doc --disable-debug --disable-runtime-cpudetect --disable-autodetect --nm=emnm --ar=emar --ranlib=emranlib --cc=emcc --cxx=em++ --objcc=emcc --dep-cc=emcc --extra-cflags='-I/opt/include -O3 -msimd128 -sUSE_PTHREADS -pthread' --extra-cxxflags='-I/opt/include -O3 -msimd128 -sUSE_PTHREADS -pthread' --enable-gpl --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libopus --enable-zlib --enable-libwebp --enable-libfreetype --enable-libfribidi --enable-libass --enable-libzimg
Post.jsx:35 [FFMPEG stderr]   libavutil      57. 28.100 / 57. 28.100
Post.jsx:35 [FFMPEG stderr]   libavcodec     59. 37.100 / 59. 37.100
Post.jsx:35 [FFMPEG stderr]   libavformat    59. 27.100 / 59. 27.100
Post.jsx:35 [FFMPEG stderr]   libavdevice    59.  7.100 / 59.  7.100
Post.jsx:35 [FFMPEG stderr]   libavfilter     8. 44.100 /  8. 44.100
Post.jsx:35 [FFMPEG stderr]   libswscale      6.  7.100 /  6.  7.100
Post.jsx:35 [FFMPEG stderr]   libswresample   4.  7.100 /  4.  7.100
Post.jsx:35 [FFMPEG stderr]   libpostproc    56.  6.100 / 56.  6.100
Post.jsx:35 [FFMPEG stderr] Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
Post.jsx:35 [FFMPEG stderr]   Metadata:
Post.jsx:35 [FFMPEG stderr]     major_brand     : mp42
Post.jsx:35 [FFMPEG stderr]     minor_version   : 0
Post.jsx:35 [FFMPEG stderr]     compatible_brands: mp42mp41isomavc1
Post.jsx:35 [FFMPEG stderr]     creation_time   : 2019-03-15T17:39:05.000000Z
Post.jsx:35 [FFMPEG stderr]   Duration: 00:00:12.82, start: 0.000000, bitrate: 5124 kb/s
Post.jsx:35 [FFMPEG stderr]   Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 4985 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
Post.jsx:35 [FFMPEG stderr]     Metadata:
Post.jsx:35 [FFMPEG stderr]       creation_time   : 2019-03-15T17:39:05.000000Z
Post.jsx:35 [FFMPEG stderr]       handler_name    : L-SMASH Video Handler
Post.jsx:35 [FFMPEG stderr]       vendor_id       : [0][0][0][0]
Post.jsx:35 [FFMPEG stderr]       encoder         : AVC Coding
Post.jsx:35 [FFMPEG stderr]   Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 137 kb/s (default)
Post.jsx:35 [FFMPEG stderr]     Metadata:
Post.jsx:35 [FFMPEG stderr]       creation_time   : 2019-03-15T17:39:05.000000Z
Post.jsx:35 [FFMPEG stderr]       handler_name    : L-SMASH Audio Handler
Post.jsx:35 [FFMPEG stderr]       vendor_id       : [0][0][0][0]
Post.jsx:35 [FFMPEG stderr] Stream mapping:
Post.jsx:35 [FFMPEG stderr]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Post.jsx:35 [FFMPEG stderr]   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0x154e4f0] using cpu capabilities: none!
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0x154e4f0] profile High, level 4.0, 4:2:0, 8-bit
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0x154e4f0] 264 - core 164 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00


  


  And it just hangs there. When I use the example video URL from the official example (https://raw.githubusercontent.com/ffmpegwasm/testdata/master/video-15s.avi), it doesn't hang and it completes the function and returns me a blob URL in the same format as that first blob URL I showed you guys and this is what the ffmpeg output looks like in my console in that case :

  


  Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] frame P:160   Avg QP:23.62  size:  1512
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] frame B:385   Avg QP:26.75  size:   589
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] consecutive B-frames:  5.5%  3.6%  0.0% 90.9%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] mb I  I16..4: 12.6% 87.4%  0.0%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] mb P  I16..4:  3.8% 47.5%  1.6%  P16..4: 12.9%  7.4%  5.0%  0.0%  0.0%    skip:21.7%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] mb B  I16..4:  1.2% 10.3%  0.4%  B16..8: 22.3%  6.9%  1.4%  direct: 2.7%  skip:54.8%  L0:46.9% L1:40.2% BI:12.9%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] 8x8 transform intra:88.7% inter:74.7%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] coded y,uvDC,uvAC intra: 68.3% 0.0% 0.0% inter: 11.8% 0.0% 0.0%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] i16 v,h,dc,p: 33% 40% 24%  3%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 26% 52%  2%  1%  1%  1%  1%  3%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 21% 20%  5%  5%  5%  4%  6%  5%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] i8c dc,h,v,p: 100%  0%  0%  0%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] Weighted P-Frames: Y:12.5% UV:0.0%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] ref P L0: 48.9% 12.5% 22.3% 14.7%  1.6%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] ref B L0: 77.5% 15.7%  6.8%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] ref B L1: 90.9%  9.1%
Post.jsx:35 [FFMPEG stderr] [libx264 @ 0xdf3000] kb/s:242.65
Post.jsx:35 [FFMPEG stderr] Aborted()


  


  Where am I going wrong, what should I convert my input blob into ? And just FYI, ChatGPT has been completely garbage at helping me solve this lmao.

  


• ffmpeg mp4 to hls transcode fails on Azure Windows Server Image [closed]

  13 février, par James Weatherhead

  I am having an issue with transcoding an mp4 (any mp4) to hls. If I run the command below on my Windows 11 machine it works fine. If I run it on a clean Windows 11 VM, it works fine. If I run it on a clean Windows 2022 Server VM it works fine. If I create a Windows 2022 server image in Azure and run it... it fails (see error below)

  


  I feel like something that FFMPEG needs is missing from the default server image in Azure. Has anyone experienced this issue and found a way to solve it ?

  


  The command I am using :

  


  ffmpeg.exe -i LowPriVMs-1.mp4 -filter_complex "[0:v]split=1[v1] ; [v1]scale=w=1920:h=1080[v1out] ; " -map "[v1out]" -c:v:0 mpeg4 -b:v:0 5000k -maxrate:v:0 5350k -bufsize:v:0 7500k -map a:0 -c:a aac -b:a:0 192k -ac 2 -f hls -hls_time 10 -hls_playlist_type vod -hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename stream_%v/data%03d.ts -master_pl_name master.m3u8 -var_stream_map "v:0,a:0" stream_%v/playlist.m3u8

  


  The error returned by FFMPEG is :

  


  [out#0/hls @ 00000204c6aded40] Could not write header (incorrect codec parameters ?) : Invalid argument

  


  Has anyone else encountered this and found a solution ? I wondered if it is required to add a Feature Pack or some such dependency to Windows ?

  


  Thanks
James

  


• fate : Add test for APV 422-10 profile

  27 avril, par Mark Thompson

  fate : Add test for APV 422-10 profile
  Bitstream generated using the reference encoder, then edited to fix the
  
  colour description and an extra metadata block added.  FFmpeg decoder
  
  output is identical to the reference decoder output.
  The content used is the first three frames of "Waterfall" from the SVT
  
  Open Content Video Test Suite 2022.  This is copyright Sveriges
  
  Television AB and is used under the Creative Commons Attribution 4.0
  
  International License.
  

  • [DH] tests/Makefile
  • [DH] tests/fate/apv.mak
  • [DH] tests/ref/fate/apv-422-10