我尝试使用 H264 编码器进行编码，但是当我这样做时，出现以下错误：
[h264_v4l2m2m @ 0x55682d2416c0] Could not find a valid device
[h264_v4l2m2m @ 0x55682d2416c0] can't configure encoder
我确保在配置 FFmpeg 时启用了编码器。当我运行命令时ffmpeg -codecs我看到 H264 编解码器被列为编码器：
DEV.LS h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
(decoders: h264 h264_v4l2m2m )
(encoders: libx264 libx264rgb h264_v4l2m2m h264_vaapi )
源视频的视频编解码器是 H264，所以我不确定为什么当同时有解码器和编码器时我无法使用 H264 进行编码。即使当我跑步时avcodec_find_encoder_by_name找到libx264编码器，它不能。
这是失败的代码块：
codec = avcodec_find_encoder(AV_CODEC_ID_H264);
if (!codec) {
printf("[ERROR] Failed to find video output codec\n");
return -1;
}
outputCodecContext = avcodec_alloc_context3(codec);
if (!outputCodecContext) {
printf("[ERROR] Failed to allocate memory for video output codec context\n");
return -1;
}
av_opt_set(outputCodecContext->priv_data, "preset", "slow", 0);
outputCodecContext->bit_rate = inputCodecContext->bit_rate;
outputCodecContext->width = inputCodecContext->width;
outputCodecContext->height = inputCodecContext->height;
outputCodecContext->time_base = (AVRational){1, 60};
outputCodecContext->framerate = (AVRational){60, 1};
outputCodecContext->pix_fmt = inputCodecContext->pix_fmt;
outputCodecContext->extradata = inputCodecContext->extradata;
outputCodecContext->extradata_size = inputCodecContext->extradata_size;
// This if statement fails as a result of the encoder error
if (avcodec_open2(outputCodecContext, codec, NULL) < 0) {
printf("[ERROR] Failed to open video output codec\n");
return -1;
}
return 0;
当我使用 H264 进行编码时ffmpeg命令，我没有收到任何这些错误。任何帮助表示赞赏。
