Преобразование потока bgra в mp4

Я пытаюсь записать видео симулятора iOS с помощью следующей команды;

./fbsimctl stream --bgra --fps 12 - | ffmpeg -f rawvideo -pix_fmt bgra -s 414x736 -framerate 12 -i - -f h264 -r 12 - | ffplay -

Проблема в том, что полученное видео искажено.

Похоже, что ffmpeg неправильно конвертирует формат bgra.

Есть ли другие параметры, которые мне нужно передать?

В середине примера вывода вставлено предупреждение:

Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) [swscaler @ 0x7f8342009000] Warning: data is not aligned! This can lead to a speed loss

Вот пример вывода;

./fbsimctl stream --bgra --fps 12 - | ffmpeg -f rawvideo -pix_fmt bgra -s 414x736 -framerate 12 -i - -f h264 -r 12 - | ffplay - ffmpeg version 4.0.2ffplay version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers Copyright (c) 2003-2018 the FFmpeg developers built with Apple LLVM version 9.1.0 (clang-902.0.39.2)  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma built with Apple LLVM version 9.1.0 (clang-902.0.39.2) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma libavutil 56. 14.100 / 56. 14.100 libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libavfilter 7. 16.100 / 7. 16.100 libavresample 4. 0. 0 / 4. 0. 0 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 1.100 / 5. 1.100 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 libpostproc 55. 1.100 / 55. 1.100 Running /usr/bin/xcode-select --print-path with environment { HOME = "/Users/sumancherukuri"; PATH = "/Users/sumancherukuri/Projects/webrtc/webrtc_ios/depot_tools:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"; } Connection Did Connect => Bridge: Framebuffer ((null)) | HID (null) | (null) 079C6C51-C335-4273-A566-7D0667693F99 | iPhone X | Booted | iPhone X | iOS 11.4 | x86_64: launch: Bridge: Framebuffer ((null)) | HID (null) | (null)  Mounting Surface with Attributes: { format = BGRA; "frame_size" = 11069184; height = 2436; "row_size" = 4544; width = 1125; } Input #0, rawvideo, from 'pipe:': Duration: N/A, start: 0.000000, bitrate: 117006 kb/s Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 414x736, 117006 kb/s, 12 tbr, 12 tbn, 12 tbc Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) [swscaler @ 0x7f8342009000] Warning: data is not aligned! This can lead to a speed loss [libx264 @ 0x7f8343801800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 0x7f8343801800] profile High 4:4:4 Predictive, level 2.2, 4:4:4 8-bit Output #0, h264, to 'pipe:': Metadata: encoder : Lavf58.12.100 Stream #0:0: Video: h264 (libx264), yuv444p, 414x736, q=-1--1, 12 fps, 12 tbn, 12 tbc Metadata: encoder : Lavc58.18.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1  listen started: Streaming Video frame= 56 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= frame= 79 fps= 77 q=26.0 size= 950kB time=00:00:01.75 bitrate=4448.9kbits/frame= 116 fps= 76 q=26.0 size= 2501kB time=00:00:04.83 bitrate=4239.1kbits/Input #0, h264, from 'pipe:':q= 0KB vq= 0KB sq= 0B f=0/0  Duration: N/A, bitrate: N/A 

Спасибо,

--Suman