Estou tentando mudar minha configuração de codificação do Mac para o Windows. Como parte disso, estou tentando fazer o FFmpeg funcionar como meu codificador ProRes.
Estou convertendo de 10 bits não-compactados para o ProRes 422 HQ. Quando faço isso, as cores são visivelmente mais escuras, em comparação com o original descompactado, e um ProRes do Adobe Media Encoder.
Estou usando
./ffmpeg -i testfile.mov -c:v prores_ks -profile:v 3 -pix_fmt yuv422p10le -c:a copy prores422_ks4.mov
Eu tentei o codec ProRes e Prores_KS, com o mesmo resultado. Eu corri MediaInfo nos arquivos e tenho o seguinte:
Adobe Media Encoder (cor correta)
Format : MPEG-4 Format profile : QuickTime Codec ID : qt 2005.03 (qt ) File size : 208 MiB Duration : 13 s 13 ms Overall bit rate mode : Variable Overall bit rate : 134 Mb/s Encoded date : UTC 2018-03-14 22:08:26 Tagged date : UTC 2018-03-14 22:09:38 Writing library : Apple QuickTime TIM : 00:59:53:00 TSC : 24000 TSZ : 1001 Video ID : 1 Format : ProRes Format version : Version 0 Format profile : 422 HQ Codec ID : apch Duration : 13 s 13 ms Bit rate mode : Variable Bit rate : 132 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:2 Scan type : Progressive Bits/(Pixel*Frame) : 2.654 Stream size : 205 MiB (98%) Writing library : Apple Language : English Encoded date : UTC 2018-03-14 22:08:26 Tagged date : UTC 2018-03-14 22:08:26 Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709
FFmpeg (cores mais escuras)
Format : MPEG-4 Format profile : QuickTime Codec ID : qt 0000.02 (qt ) File size : 195 MiB Duration : 13 s 55 ms Overall bit rate mode : Variable Overall bit rate : 125 Mb/s Writing application : Lavf57.83.100 Video ID : 1 Format : ProRes Format version : Version 0 Format profile : 422 HQ Codec ID : apch Duration : 13 s 55 ms Bit rate mode : Variable Bit rate : 124 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:2 Scan type : Progressive Bits/(Pixel*Frame) : 2.485 Stream size : 192 MiB (99%) Writing library : Lavc Language : English Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709
Imagens originais
Format : MPEG-4 Format profile : QuickTime Codec ID : qt 2005.03 (qt ) File size : 2.42 GiB Duration : 13 s 55 ms Overall bit rate : 1 592 Mb/s Encoded date : UTC 2018-03-14 20:32:39 Tagged date : UTC 2018-03-14 20:32:39 Video ID : 1 Format : RGB Codec ID : r210 Codec ID/Hint : Blackmagic Design Duration : 13 s 55 ms Bit rate mode : Constant Bit rate : 1 591 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Scan type : Progressive Bits/(Pixel*Frame) : 32.000 Stream size : 2.42 GiB (100%) Language : English Encoded date : UTC 2018-03-14 20:32:39 Tagged date : UTC 2018-03-14 20:32:39 Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709
Aqui está a saída do FFMpeg
Guessed Channel Layout for Input Stream #0.2 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testfile.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2018-03-14T20:32:39.000000Z
Duration: 00:00:13.05, start: 0.000000, bitrate: 1592473 kb/s
Stream #0:0(eng): Video: r210 (r210 / 0x30313272), rgb48le(10 bpc, bt709, progressive), 1920x1080, 1590933 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 24k tbn, 24k tbc (default)
Metadata:
creation_time : 2018-03-14T20:32:39.000000Z
handler_name : Linux Alias Data Handler
encoder : 10 bit packed RGB (r210)
timecode : 00:59:53:00
Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
rotate : 0
creation_time : 2018-03-14T20:32:39.000000Z
handler_name : Libquicktime Time Code Media Handler
reel_name : untitled
timecode : 00:59:53:00
Stream #0:2(eng): Audio: pcm_s16be (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2018-03-14T20:32:39.000000Z
handler_name : Linux Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (r210 (native) -> prores (prores_ks))
Stream #0:2 -> #0:1 (copy)
Press [q] to stop, [?] for help
Output #0, mov, to 'prores422_ks9.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf57.83.100
Stream #0:0(eng): Video: prores (prores_ks) (apch / 0x68637061), yuv422p10le, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 23.98 fps, 24k tbn, 23.98 tbc (default)
Metadata:
creation_time : 2018-03-14T20:32:39.000000Z
handler_name : Linux Alias Data Handler
timecode : 00:59:53:00
encoder : Lavc57.107.100 prores_ks
Stream #0:1(eng): Audio: pcm_s16be (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2018-03-14T20:32:39.000000Z
handler_name : Linux Alias Data Handler
Aqui estão algumas imagens de exemplo da aparência da mudança. Não posso postar quadros completos ou qualquer coisa que identifique o conteúdo, mas aqui estão algumas amostras de cores.
Nota: eu aparado um quadro preto ou dois no final no Media Encoder
Eu sou um noob no FFmpeg, então qualquer ajuda seria muito apreciada! Eu suponho que estou perdendo algo óbvio.
