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testcuda.py
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testcuda.py
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# 测试 CUDA 可用性
# 找到一个 h264 编码的mp4视频，重命名为 raw.mp4，然后复制到和当前脚本同目录下，然后执行测试
import json
import subprocess
import torch
import os
import sys
from torch.backends import cudnn
# ffmpeg
rootdir = os.getcwd()
tmpdir = os.path.join(rootdir, 'tmp')
if sys.platform == 'win32':
os.environ['PATH'] = rootdir + f';{rootdir}\\ffmpeg;' + os.environ['PATH']
else:
os.environ['PATH'] = rootdir + f':{rootdir}/ffmpeg:' + os.environ['PATH']
if torch.cuda.is_available():
print('CUDA is ok')
else:
print("no CUDA environ")
input("\nPress enter for close")
sys.exit()
if cudnn.is_available() and cudnn.is_acceptable(torch.tensor(1.).cuda()):
print('cudnn is ok')
else:
print('no cudnn ')
input("\nPress enter for close")
sys.exit()
result = subprocess.run(['ffmpeg', '-hwaccels'], text=True, stdout=subprocess.PIPE)
print(f'Accels:\n{result.stdout}')
if not os.path.exists(tmpdir):
os.makedirs(tmpdir, exist_ok=True)
# 原始视频
sourcemp4 = rootdir + "/raw.mp4"
sourceavi = rootdir + "/raw.mp4.avi"
if not os.path.exists(sourcemp4):
print('\ncopy a video rename raw.mp4, and paster to here')
input("\nPress enter for close")
sys.exit()
def runffmpeg(cmd, *, title=""):
p = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
encoding="utf-8",
stderr=subprocess.PIPE)
outs, errs = p.communicate()
if p.returncode == 0:
print(f'\n[OK] {title}:\n{cmd=}\n')
return True
print("\n\n******Its Error*******")
print(f'\n[Error] {title}\n')
print(f'{cmd=}')
print(str(errs))
print("\n******Error*******\n")
for (i, it) in enumerate(cmd):
if it == '-hwaccel' and cmd[i] == 'cuda':
print(f'hwaccel_output_format=cuda Dont Support, But hwaccel_output_format=nv12 is OK')
break
input("\nPress enter for close")
sys.exit()
def runffprobe(cmd):
try:
p = subprocess.run(['ffprobe'] + cmd, stdout=subprocess.PIPE, text=True)
if p.returncode == 0:
return p.stdout.strip()
else:
print(f'{p.stderr=}')
return False
except subprocess.CalledProcessError as e:
print(f'{e=}')
return False
# 获取视频信息
def get_video_info(mp4_file, *, video_fps=False, video_scale=False, video_time=False):
out = runffprobe(['-v', 'quiet', '-print_format', 'json', '-show_format', '-show_streams', mp4_file])
if out is False:
raise Exception(f'ffprobe error:dont get video information')
out = json.loads(out)
result = {
"video_fps": 0,
"video_codec_name": "h264",
"audio_codec_name": "aac",
"width": 0,
"height": 0,
"time": 0,
"streams_len": 0,
"streams_audio": 0
}
if "streams" not in out or len(out["streams"]) < 1:
raise Exception(f'ffprobe error:streams is 0')
if "format" in out and out['format']['duration']:
result['time'] = int(float(out['format']['duration']) * 1000)
for it in out['streams']:
result['streams_len'] += 1
if it['codec_type'] == 'video':
result['video_codec_name'] = it['codec_name']
result['width'] = int(it['width'])
result['height'] = int(it['height'])
fps, c = it['r_frame_rate'].split('/')
if not c or c == '0':
c = 1
fps = int(fps)
else:
fps = round(int(fps) / int(c))
result['video_fps'] = fps
elif it['codec_type'] == 'audio':
result['streams_audio'] += 1
result['audio_codec_name'] = it['codec_name']
if video_time:
return result['time']
if video_fps:
return ['video_fps']
if video_scale:
return result['width'], result['height']
return result
def test_cuda(*, hwaccel_output_format=""):
if hwaccel_output_format == "cuda":
acc_name = "cuda"
libx264 = "h264_nvenc"
elif hwaccel_output_format == 'nv12':
acc_name = "cuvid"
libx264 = "h264_nvenc"
else:
acc_name = None
libx264 = "libx264"
# 从视频中截取的图片
img = os.path.join(tmpdir, '1.jpg')
# 从原始视频中分离出的无声视频
novoice = os.path.join(tmpdir, 'novoice.mp4')
# 视频 音频 硬字幕合并后输出
out_hard = os.path.join(tmpdir, 'out_hard.mp4')
# 视频 音频 软字幕合并后输出
out_soft = os.path.join(tmpdir, 'out_soft.mp4')
# 配音无字幕
out_nosrt = os.path.join(tmpdir, 'out_nosrt.mp4')
# 从原始视频中分离出音频
m4a = os.path.join(tmpdir, '1.m4a')
# m4a 格式转为 wav格式
wav = os.path.join(tmpdir, '1.wav')
wavspeedup = os.path.join(tmpdir, '1-speedup.wav')
# 连接2个视频片段
concat = os.path.join(tmpdir, 'concat.txt')
# 字幕文件
srtfile = os.path.join(tmpdir, 'zimu.srt')
# 根据图片生成的视频
imgvideo = os.path.join(tmpdir, 'img.mp4')
# 从视频中截取的片段
pianduan = os.path.join(tmpdir, 'pianduan.mp4')
# 图片视频片段和截取的片段合并
hebing = os.path.join(tmpdir, 'imgvideo-pianduan.mp4')
# 获取视频信息
video_info = get_video_info(sourcemp4)
if not video_info or video_info['time'] == 0:
print("The video is error,please replace")
input("\nPress enter will close")
sys.exit()
print(f"start test -hwaccel_output_format={hwaccel_output_format} ...")
if video_info['video_codec_name'] != 'h264' or video_info['audio_codec_name'] != 'aac':
# 转换
tmptestmp4 = os.path.join(rootdir, 'tmptest.mp4')
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2']
runffmpeg(accel_pre + [
'-y',
'-i',
sourcemp4,
'-c:v',
libx264,
'-c:a',
'aac',
tmptestmp4]
, title="raw.mp4格式不正确，请确保是h264编码的mp4视频")
os.unlink(sourcemp4)
os.rename(tmptestmp4, sourcemp4)
# 获取视频信息
video_info = get_video_info(sourcemp4)
if not video_info or video_info['time'] == 0:
print("The video is error,please replace")
input("\nPress enter will close")
sys.exit()
fps = video_info['video_fps']
scale = [video_info['width'], video_info['height']]
# 从原始视频 分离出无声视频 cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
sourcemp4,
'-an',
'-c:v',
libx264,
novoice]
, title='从原始视频 分离出无声视频')
# 从原始视频 分离出音频 cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
sourcemp4,
'-vn',
'-c:a',
'copy',
m4a]
, title='从原始视频 分离出音频')
# 分离出的 m4a 转为 wav cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
m4a,
'-ac',
'1',
wav]
, title='分离出的 m4a 转为 wav')
# 提取最后一帧为图片 nv12 + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
"nv12",
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-sseof',
'-3',
'-i',
novoice,
'-q:v',
'1',
'-qmin:v',
'1',
'-qmax:v',
'1',
'-update',
'true',
img]
, title='提取最后一帧为图片')
# 根据图片创建 5s 的视频 nv12 + not h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
"nv12",
'-extra_hw_frames',
'2', ]
runffmpeg(accel_pre + [
'-y',
'-loop',
'1',
'-i',
img,
'-vf',
f"fps={fps},scale={scale[0]}:{scale[1]}",
'-c:v',
libx264,
'-crf',
'13',
'-to',
'00:00:05',
imgvideo]
, title='根据图片创建 5s 的视频')
# 截取 00:00:05 -- 00:00:15 nv12 + not h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-ss',
'00:00:05',
'-to',
'00:00:10.500',
'-i',
novoice,
'-vf',
"setpts=2*PTS",
'-c:v',
libx264,
'-crf',
'13',
pianduan]
, title='截取 00:00:05 -- 00:00:15')
# imgvideo 和 pianduan 合并
srttext = f"""
file '{imgvideo}'
file '{pianduan}'
"""
with open(concat, 'w', encoding='utf-8') as f:
f.write(srttext)
# 连接 2个视频片段 cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-f',
'concat',
'-safe',
'0',
'-i',
concat,
'-c:v',
libx264,
'-crf',
'13',
'-an',
hebing]
, title='连接 2个视频片段')
with open(srtfile, 'w', encoding='utf-8') as f:
f.write("""
1
00:00:00,000 --> 00:00:05,780
rear seat
2
00:00:05,780 --> 00:00:08,436
In this issue we introduce electromagnetic punishment in the park
3
00:00:08,436 --> 00:00:10,132
First of all, we got an electromagnetic penalty""")
if sys.platform == 'win32':
hardfile = os.path.basename(srtfile)
else:
hardfile = srtfile
# 视频 音频 硬字幕合并 nv12 + h264_cuvid
os.chdir(os.path.dirname(srtfile))
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
"nv12",
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
novoice,
'-i',
m4a,
'-c:v',
libx264,
'-c:a',
'copy',
'-vf',
f'subtitles={hardfile}',
out_hard]
, title='视频 音频 硬字幕合并')
# 视频 硬字幕 nv12 + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
"nv12",
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
novoice,
'-c:v',
libx264,
'-vf',
f'subtitles={hardfile}',
out_hard]
, title='视频 硬字幕')
# 视频 配音 软字幕 cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ['ffmpeg',
'-hide_banner',
'-ignore_unknown',
'-vsync',
'vfr',
'-hwaccel',
acc_name,
'-hwaccel_output_format',
hwaccel_output_format,
'-extra_hw_frames',
'2', '-c:v',
'h264_cuvid', ]
runffmpeg(accel_pre + [
'-y',
'-i',
novoice,
'-i',
m4a,
'-i',
srtfile,
'-c:v',
libx264,
'-c:a',
'copy',
'-c:s',
'mov_text',
'-metadata:s:s:0',
'language=chi',
out_soft]
, title='视频 配音 软字幕')
# 软字幕无配音 cuda + h264_cuvid
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ["ffmpeg", "-hide_banner",
"-ignore_unknown", "-vsync", "vfr",
"-hwaccel", acc_name,
"-hwaccel_output_format",
hwaccel_output_format,
"-extra_hw_frames", "2", "-c:v",
"h264_cuvid", ]
runffmpeg(
accel_pre + ["-y", "-i", novoice, "-i", srtfile, "-c:v", libx264, "-c:s", "mov_text",
"-metadata:s:s:0", "language=chi", out_soft], title='软字幕无配音')
# 配音无字幕
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ["ffmpeg", "-hide_banner",
"-ignore_unknown", "-vsync", "vfr",
"-hwaccel", acc_name,
"-hwaccel_output_format",
hwaccel_output_format,
"-extra_hw_frames", "2", "-c:v",
"h264_cuvid", ]
runffmpeg(accel_pre + ["-y", "-i", novoice, "-i", m4a, "-c:v", libx264, "-c:a", "copy",
out_nosrt], title='配音无字幕')
# 加速音频
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ["ffmpeg", "-hide_banner",
"-ignore_unknown", "-vsync", "vfr",
"-hwaccel", acc_name,
"-hwaccel_output_format",
hwaccel_output_format,
"-extra_hw_frames", "2", "-c:v",
"h264_cuvid", ]
runffmpeg(accel_pre + ["-y", "-i", wav, "-af", "atempo=2", wavspeedup], title='加速音频')
# mp4 转为 api
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ["ffmpeg", "-hide_banner",
"-ignore_unknown", "-vsync", "vfr",
"-hwaccel", acc_name,
"-hwaccel_output_format", "nv12",
"-extra_hw_frames", "2", ]
runffmpeg(accel_pre + ["-y", "-i", sourcemp4, "-c:v", libx264, "-c:a", "aac", sourceavi], title='mp4 转为 avi')
# avi 转为 mp4
accel_pre = ["ffmpeg", "-hide_banner", '-ignore_unknown'] if not acc_name else ["ffmpeg", "-hide_banner",
"-ignore_unknown", "-vsync", "vfr",
"-hwaccel", acc_name,
"-hwaccel_output_format",
hwaccel_output_format,
"-extra_hw_frames", "2", ]
runffmpeg(accel_pre + ["-y", "-i", sourceavi, "-c:v", libx264, "-c:a", "aac", f"{sourceavi}.mp4"],
title='avi 转为 mp4')
test_cuda(hwaccel_output_format="nv12")
print("\n[hwaccel_output_format=nv12 is ok,CUDA OK】\n\n")
print("\nNext will test hwaccel_output_format=cuda\n")
test_cuda(hwaccel_output_format="cuda")
print(
"hwaccel_output_format=cuda is ok\nMay be open videotrans/set.ini\nedit 'hwaccel_output_format=nv12' to 'hwaccel_output_format=cuda'\n And edit 'hwaccel=cuvid' to 'hwaccel=cuda'")
input("\nPress enter for close")