What codecs are supported?

[ckao10301]

Use Load Video node to upload a mp4/av1 codec video and got this error. @AustinMroz

[av1 @ 0x7fc414009b80] Your platform doesn't suppport hardware accelerated AV1 decoding.
[av1 @ 0x7fc414009b80] Failed to get pixel format.
[av1 @ 0x7fc414009b80] Missing Sequence Header.
[av1 @ 0x7fc414009b80] Missing Sequence Header.
[av1 @ 0x7fc414009b80] Missing Sequence Header.

[AustinMroz]

I've been aware of this specific issues for quite a while, but this is the first time I've seen anyone other than myself run into it. I assumed it was the result of something specifically broken about my my setup (Arch Linux, AMD GPU), but it might be possible to narrow things down now. Otherwise, the equivalent "Load Video (ffmpeg)" nodes do not have this issue.

And to provide an answer for the original question: The base load video node uses OpenCV for the backend, which itself uses libavcodec. My installation uses has version 59.37.100 (which is fairly fresh), but I didn't see a quick way to check compile time options. If you're using the Load Video ffmpeg node, you can check with ffmpeg -codecs. If you have system ffmpeg installed, it will likely be preffered

Codecs for bundled imageio ffmpeg

012v 4xm 8bps a64_multi a64_multi5 aasc agm aic alias_pix amv anm ansi apng arbc asv1 asv2 aura aura2 av1 avrn avrp avs avs2 avui ayuv bethsoftvid bfi binkvideo bintext bitpacked bmp bmv_video brender_pix c93 cavs cdgraphics cdxl cfhd cinepak clearvideo cljr cllc cmv cpia cscd cyuv daala dds dfa dirac dnxhd dpx dsicinvideo dvvideo dxa dxtory dxv escape124 escape130 exr ffv1 ffvhuff fic fits flashsv flashsv2 flic flv1 fmvc fraps frwu g2m gdv gif h261 h263 h263i h263p h264 hap hevc hnm4video hq_hqa hqx huffyuv hymt idcin idf iff_ilbm imm4 indeo2 indeo3 indeo4 indeo5 interplayvideo jpeg2000 jpegls jv kgv1 kmvc lagarith ljpeg loco lscr m101 mad magicyuv mdec mimic mjpeg mjpegb mmvideo motionpixels mpeg1video mpeg2video mpeg4 msa1 mscc msmpeg4v1 msmpeg4v2 msmpeg4v3 msrle mss1 mss2 msvideo1 mszh mts2 mvc1 mvc2 mwsc mxpeg nuv paf_video pam pbm pcx pgm pgmyuv pictor pixlet png ppm prores prosumer psd ptx qdraw qpeg qtrle r10k r210 rasc rawvideo rl2 roq rpza rscc rv10 rv20 rv30 rv40 sanm scpr screenpresso sgi sgirle sheervideo smackvideo smc smvjpeg snow sp5x speedhq srgc sunrast svg svq1 svq3 targa targa_y216 tdsc tgq tgv theora thp tiertexseqvideo tiff tmv tqi truemotion1 truemotion2 truemotion2rt tscc tscc2 txd ulti utvideo v210 v210x v308 v408 v410 vb vble vc1 vc1image vcr1 vixl vmdvideo vmnc vp3 vp4 vp5 vp6 vp6a vp6f vp7 vp8 vp9 wcmv webp wmv1 wmv2 wmv3 wmv3image wnv1 wrapped_avframe ws_vqa xan_wc3 xan_wc4 xbin xbm xface xpm xwd y41p ylc yop yuv4 zerocodec zlib zmbv 4gv 8svx_exp 8svx_fib aac aac_latm ac3 adpcm_4xm adpcm_adx adpcm_afc adpcm_agm adpcm_aica adpcm_ct adpcm_dtk adpcm_ea adpcm_ea_maxis_xa adpcm_ea_r1 adpcm_ea_r2 adpcm_ea_r3 adpcm_ea_xas adpcm_g722 adpcm_g726 adpcm_g726le adpcm_ima_amv adpcm_ima_apc adpcm_ima_dat4 adpcm_ima_dk3 adpcm_ima_dk4 adpcm_ima_ea_eacs adpcm_ima_ea_sead adpcm_ima_iss adpcm_ima_oki adpcm_ima_qt adpcm_ima_rad adpcm_ima_smjpeg adpcm_ima_wav adpcm_ima_ws adpcm_ms adpcm_mtaf adpcm_psx adpcm_sbpro_2 adpcm_sbpro_3 adpcm_sbpro_4 adpcm_swf adpcm_thp adpcm_thp_le adpcm_vima adpcm_xa adpcm_yamaha alac amr_nb amr_wb ape aptx aptx_hd atrac1 atrac3 atrac3al atrac3p atrac3pal atrac9 avc binkaudio_dct binkaudio_rdft bmv_audio celt codec2 comfortnoise cook dolby_e dsd_lsbf dsd_lsbf_planar dsd_msbf dsd_msbf_planar dsicinaudio dss_sp dst dts dvaudio eac3 evrc flac g723_1 g729 gremlin_dpcm gsm gsm_ms hcom iac ilbc imc interplay_dpcm interplayacm mace3 mace6 metasound mlp mp1 mp2 mp3 mp3adu mp3on4 mp4als musepack7 musepack8 nellymoser opus paf_audio pcm_alaw pcm_bluray pcm_dvd pcm_f16le pcm_f24le pcm_f32be pcm_f32le pcm_f64be pcm_f64le pcm_lxf pcm_mulaw pcm_s16be pcm_s16be_planar pcm_s16le pcm_s16le_planar pcm_s24be pcm_s24daud pcm_s24le pcm_s24le_planar pcm_s32be pcm_s32le pcm_s32le_planar pcm_s64be pcm_s64le pcm_s8 pcm_s8_planar pcm_u16be pcm_u16le pcm_u24be pcm_u24le pcm_u32be pcm_u32le pcm_u8 pcm_vidc pcm_zork qcelp qdm2 qdmc ra_144 ra_288 ralf roq_dpcm s302m sbc sdx2_dpcm shorten sipr smackaudio smv sol_dpcm sonic sonicls speex tak truehd truespeech tta twinvq vmdaudio vorbis wavesynth wavpack westwood_snd1 wmalossless wmapro wmav1 wmav2 wmavoice xan_dpcm xma1 xma2 bin_data dvd_nav_packet klv otf scte_35 timed_id3 ttf arib_caption ass dvb_subtitle dvb_teletext dvd_subtitle eia_608 hdmv_pgs_subtitle hdmv_text_subtitle jacosub microdvd mov_text mpl2 pjs realtext sami srt ssa stl subrip subviewer subviewer1 text ttml vplayer webvtt xsub