FFMPEG получить поток из канала через Netcat не удается

Я пытаюсь получить поток через netcat и передать его в FFMPEG, а затем вывести в файл, но получаю ошибку.

Самая простая команда, которую я пробовал, была:

$ nc -l -p 1935 | ffmpeg -v debug -y -f h264 -i pipe:0 out.mp4  ffmpeg version 3.1 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.8.2 (GCC) configuration: --prefix=/pkg/ffmpeg.org/3.1/ffmpeg --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include --enable-gpl --enable-libx264 --enable-shared --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libtheora --enable-libvorbis --enable-libx264 --enable-postproc --enable-runtime-cpudetect --enable-memalign-hack --enable-pthreads --disable-x11grab --enable-bzlib --enable-zlib --enable-static --enable-libmp3lame --enable-libx264 --enable-librtmp libavutil 55. 27.100 / 55. 27.100 libavcodec 57. 48.101 / 57. 48.101 libavformat 57. 40.101 / 57. 40.101 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 46.102 / 6. 46.102 libswscale 4. 1.100 / 4. 1.100 libswresample 2. 1.100 / 2. 1.100 libpostproc 54. 0.100 / 54. 0.100 Splitting the commandline. Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'. Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'. Reading option '-f' ... matched as option 'f' (force format) with argument 'h264'. Reading option '-i' ... matched as input file with argument 'pipe:0'. Reading option 'out.mp4' ... matched as output file. Finished splitting the commandline. Parsing a group of options: global . Applying option v (set logging level) with argument debug. Applying option y (overwrite output files) with argument 1. Successfully parsed a group of options. Parsing a group of options: input file pipe:0. Applying option f (force format) with argument h264. Successfully parsed a group of options. Opening an input file: pipe:0. [pipe @ 0xe79c80] Setting default whitelist 'crypto' [h264 @ 0xe794c0] Before avformat_find_stream_info() pos: 0 bytes read:1537 seeks:0 nb_streams:1 [h264 @ 0xe82b00] sps_id 5 out of range [h264 @ 0xe82b00] missing picture in access unit with size 1537 [h264 @ 0xe82b00] Invalid NAL unit 0, skipping. [h264 @ 0xe82b00] no frame! [h264 @ 0xe794c0] decoding for stream 0 failed [h264 @ 0xe794c0] Could not find codec parameters for stream 0 (Video: h264, 1 reference frame, none(left)): unspecified size Consider increasing the value for the 'analyzeduration' and 'probesize' options [h264 @ 0xe794c0] After avformat_find_stream_info() pos: 1537 bytes read:1537 seeks:0 frames:1 Input #0, h264, from 'pipe:0': Duration: N/A, bitrate: N/A Stream #0:0, 1, 1/1200000: Video: h264, 1 reference frame, none(left), 25 tbr, 1200k tbn, 50 tbc Successfully opened the file. Parsing a group of options: output file out.mp4. Successfully parsed a group of options. Opening an output file: out.mp4. [file @ 0xe925c0] Setting default whitelist 'file,crypto' Successfully opened the file. detected 1 logical cores   [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'video_size' to value '0x0' [buffer @ 0xe9ad60] Unable to parse option value "0x0" as image size [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'pix_fmt' to value '-1' [buffer @ 0xe9ad60] Unable to parse option value "-1" as pixel format [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'time_base' to value '1/1200000' [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'pixel_aspect' to value '0/1' [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'sws_param' to value 'flags=2' [graph 0 input from stream 0:0 @ 0xe9ac60] Setting 'frame_rate' to value '50/2' [buffer @ 0xe9ad60] Unable to parse option value "0x0" as image size [buffer @ 0xe9ad60] Error setting option video_size to value 0x0. [graph 0 input from stream 0:0 @ 0xe9ac60] Error applying options to the filter. Error opening filters! [AVIOContext @ 0xe9a700] Statistics: 0 seeks, 0 writeouts [AVIOContext @ 0xe82000] Statistics: 1537 bytes read, 0 seeks 

Из-за Consider increasing the value for the 'analyzeduration' and 'probesize' optionsсообщения, которое я тогда попробовал:

nc -l -p 1935 | ffmpeg -v debug -y -f h264 -analyzeduration 9M -probesize 9M -i pipe:0 out.mp4

Я получил ту же ошибку, поэтому я начал добавлять свои собственные параметры кодека, поскольку кажется, что он не может определить, какой это тип потока.

nc -l -p 1935 | ffmpeg -v debug -y -f h264 -c:a aac -pix_fmt yuv420p -s 1280x720 -framerate 30 -analyzeduration 9M -probesize 9M -i pipe:0 out.mp4

Но теперь я получаю:

Option video_size not found.

Есть идеи?