cd $(flatpak info -l org.gnome.Totem.Codecs) && find -name '*.c' -or -name '*.h'

gistfile0.txt

./files/include/libavcodec/mediacodec.h
./files/include/libavcodec/dirac.h
./files/include/libavcodec/avfft.h
./files/include/libavcodec/videotoolbox.h
./files/include/libavcodec/dxva2.h
./files/include/libavcodec/vdpau.h
./files/include/libavcodec/version.h
./files/include/libavcodec/vaapi.h
./files/include/libavcodec/dv_profile.h
./files/include/libavcodec/jni.h
./files/include/libavcodec/avdct.h
./files/include/libavcodec/d3d11va.h
./files/include/libavcodec/avcodec.h
./files/include/libavcodec/adts_parser.h
./files/include/libavcodec/qsv.h
./files/include/libavcodec/vorbis_parser.h
./files/include/libavcodec/ac3_parser.h
./files/include/libavcodec/xvmc.h
./files/include/libavformat/avformat.h
./files/include/libavformat/avio.h
./files/include/libavformat/version.h
./files/include/libswscale/version.h
./files/include/libswscale/swscale.h
./files/include/libavdevice/avdevice.h
./files/include/libavdevice/version.h
./files/include/libavutil/murmur3.h
./files/include/libavutil/stereo3d.h
./files/include/libavutil/lfg.h
./files/include/libavutil/macros.h
./files/include/libavutil/avutil.h
./files/include/libavutil/random_seed.h
./files/include/libavutil/hwcontext_mediacodec.h
./files/include/libavutil/mem.h
./files/include/libavutil/timestamp.h
./files/include/libavutil/lzo.h
./files/include/libavutil/mastering_display_metadata.h
./files/include/libavutil/audio_fifo.h
./files/include/libavutil/pixdesc.h
./files/include/libavutil/time.h
./files/include/libavutil/ripemd.h
./files/include/libavutil/motion_vector.h
./files/include/libavutil/hwcontext_videotoolbox.h
./files/include/libavutil/hwcontext_cuda.h
./files/include/libavutil/blowfish.h
./files/include/libavutil/samplefmt.h
./files/include/libavutil/hwcontext_drm.h
./files/include/libavutil/hwcontext_vdpau.h
./files/include/libavutil/hash.h
./files/include/libavutil/base64.h
./files/include/libavutil/version.h
./files/include/libavutil/ffversion.h
./files/include/libavutil/avassert.h
./files/include/libavutil/encryption_info.h
./files/include/libavutil/dict.h
./files/include/libavutil/crc.h
./files/include/libavutil/pixfmt.h
./files/include/libavutil/hwcontext.h
./files/include/libavutil/hwcontext_dxva2.h
./files/include/libavutil/intfloat.h
./files/include/libavutil/hwcontext_d3d11va.h
./files/include/libavutil/tea.h
./files/include/libavutil/buffer.h
./files/include/libavutil/channel_layout.h
./files/include/libavutil/spherical.h
./files/include/libavutil/parseutils.h
./files/include/libavutil/avconfig.h
./files/include/libavutil/eval.h
./files/include/libavutil/mathematics.h
./files/include/libavutil/aes.h
./files/include/libavutil/attributes.h
./files/include/libavutil/opt.h
./files/include/libavutil/md5.h
./files/include/libavutil/threadmessage.h
./files/include/libavutil/camellia.h
./files/include/libavutil/file.h
./files/include/libavutil/hdr_dynamic_metadata.h
./files/include/libavutil/avstring.h
./files/include/libavutil/adler32.h
./files/include/libavutil/downmix_info.h
./files/include/libavutil/tree.h
./files/include/libavutil/intreadwrite.h
./files/include/libavutil/rc4.h
./files/include/libavutil/pixelutils.h
./files/include/libavutil/bprint.h
./files/include/libavutil/cpu.h
./files/include/libavutil/error.h
./files/include/libavutil/display.h
./files/include/libavutil/hwcontext_vaapi.h
./files/include/libavutil/aes_ctr.h
./files/include/libavutil/xtea.h
./files/include/libavutil/fifo.h
./files/include/libavutil/frame.h
./files/include/libavutil/twofish.h
./files/include/libavutil/tx.h
./files/include/libavutil/timecode.h
./files/include/libavutil/cast5.h
./files/include/libavutil/sha.h
./files/include/libavutil/imgutils.h
./files/include/libavutil/rational.h
./files/include/libavutil/hmac.h
./files/include/libavutil/common.h
./files/include/libavutil/sha512.h
./files/include/libavutil/replaygain.h
./files/include/libavutil/bswap.h
./files/include/libavutil/des.h
./files/include/libavutil/log.h
./files/include/libavutil/hwcontext_qsv.h
./files/include/libavfilter/buffersink.h
./files/include/libavfilter/avfilter.h
./files/include/libavfilter/version.h
./files/include/libavfilter/buffersrc.h
./files/include/libswresample/version.h
./files/include/libswresample/swresample.h
./files/share/ffmpeg/examples/vaapi_transcode.c
./files/share/ffmpeg/examples/muxing.c
./files/share/ffmpeg/examples/scaling_video.c
./files/share/ffmpeg/examples/filtering_video.c
./files/share/ffmpeg/examples/filter_audio.c
./files/share/ffmpeg/examples/encode_audio.c
./files/share/ffmpeg/examples/http_multiclient.c
./files/share/ffmpeg/examples/metadata.c
./files/share/ffmpeg/examples/hw_decode.c
./files/share/ffmpeg/examples/remuxing.c
./files/share/ffmpeg/examples/transcoding.c
./files/share/ffmpeg/examples/avio_reading.c
./files/share/ffmpeg/examples/transcode_aac.c
./files/share/ffmpeg/examples/decode_audio.c
./files/share/ffmpeg/examples/encode_video.c
./files/share/ffmpeg/examples/avio_dir_cmd.c
./files/share/ffmpeg/examples/extract_mvs.c
./files/share/ffmpeg/examples/resampling_audio.c
./files/share/ffmpeg/examples/demuxing_decoding.c
./files/share/ffmpeg/examples/vaapi_encode.c
./files/share/ffmpeg/examples/qsvdec.c
./files/share/ffmpeg/examples/filtering_audio.c
./files/share/ffmpeg/examples/decode_video.c